Artykuły w czasopismach: „PIEZOELECTRIC PERFORMANCE”

1

Liu, Qing, Yichi Zhang, Jing Gao, Zhen Zhou, Hui Wang, Ke Wang, Xiaowen Zhang, Longtu Li i Jing-Feng Li. "High-performance lead-free piezoelectrics with local structural heterogeneity". Energy & Environmental Science 11, nr 12 (2018): 3531–39. http://dx.doi.org/10.1039/c8ee02758g.

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Zhang, Zhong Hua, Guang Ming Cheng, Jun Wu Kan, Ping Zeng i Jian Ming Wen. "The Influence of Multiple Piezoelectric Effects on Elastic Coefficient of Piezoelectric Ceramics". Advanced Materials Research 305 (lipiec 2011): 348–52. http://dx.doi.org/10.4028/www.scientific.net/amr.305.348.

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The development of new materials and the performance improvement of existing materials become an important subject from different aspects. In this paper, based on the theoretical research results of multiple piezoelectric effects, the influence of multiple piezoelectric effects on elastic coefficient of piezoelectric ceramics is studied. Theoretical analysis indicates that it is multiple piezoelectric effects that make piezoelectrics have two kinds of elastic and they result in the decrease of elastic compliance coefficients. Experimental validation is performed through PZT-5. Experimental results show that elastic compliance coefficient grows decreased by 0.912 times.

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Hlinka, Jiří. "Doubling up piezoelectric performance". Science 364, nr 6437 (19.04.2019): 228–29. http://dx.doi.org/10.1126/science.aax0693.

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Trolier-McKinstry, Susan, Shujun Zhang, Andrew J. Bell i Xiaoli Tan. "High-Performance Piezoelectric Crystals, Ceramics, and Films". Annual Review of Materials Research 48, nr 1 (lipiec 2018): 191–217. http://dx.doi.org/10.1146/annurev-matsci-070616-124023.

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Piezoelectric materials convert between electrical and mechanical energies such that an applied stress induces a polarization and an applied electric field induces a strain. This review describes the fundamental mechanisms governing the piezoelectric response in high-performance piezoelectric single crystals, ceramics, and thin films. While there are a number of useful piezoelectric small molecules and polymers, the article focuses on inorganic materials displaying the piezoelectric effect. Piezoelectricity is first defined, and the mechanisms that contribute are discussed in terms of the key crystal structures for materials with large piezoelectric coefficients. Exemplar systems are then discussed and compared for the cases of single crystals, bulk ceramics, and thin films.

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Yu, Fapeng, Qingming Lu, Shujun Zhang, Hewei Wang, Xiufeng Cheng i Xian Zhao. "High-performance, high-temperature piezoelectric BiB3O6 crystals". Journal of Materials Chemistry C 3, nr 2 (2015): 329–38. http://dx.doi.org/10.1039/c4tc02112f.

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BiB₃O₆ crystals possess large piezoelectric coefficients and high-temperature stability of their piezoelectric properties, which is promising for piezoelectric sensor applications.

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Duan, Shengshun, Jun Wu, Jun Xia i Wei Lei. "Innovation Strategy Selection Facilitates High-Performance Flexible Piezoelectric Sensors". Sensors 20, nr 10 (15.05.2020): 2820. http://dx.doi.org/10.3390/s20102820.

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Piezoelectric sensors with high performance and low-to-zero power consumption meet the growing demand in the flexible microelectronic system with small size and low power consumption, which are promising in robotics and prosthetics, wearable devices and electronic skin. In this review, the development process, application scenarios and typical cases are discussed. In addition, several strategies to improve the performance of piezoelectric sensors are summed up: (1) material innovation: from piezoelectric semiconductor materials, inorganic piezoceramic materials, organic piezoelectric polymer, nanocomposite materials, to emerging and promising molecular ferroelectric materials. (2) designing microstructures on the surface of the piezoelectric materials to enlarge the contact area of piezoelectric materials under the applied force. (3) addition of dopants such as chemical elements and graphene in conventional piezoelectric materials. (4) developing piezoelectric transistors based on piezotronic effect. In addition, the principle, advantages, disadvantages and challenges of every strategy are discussed. Apart from that, the prospects and directions of piezoelectric sensors are predicted. In the future, the electronic sensors need to be embedded in the microelectronic systems to play the full part. Therefore, a strategy based on peripheral circuits to improve the performance of piezoelectric sensors is proposed in the final part of this review.

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Mohammadi, S., i M. Abdalbeigi. "Analytical Optimization of Piezoelectric Circular Diaphragm Generator". Advances in Materials Science and Engineering 2013 (2013): 1–10. http://dx.doi.org/10.1155/2013/620231.

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This paper presents an analytical study of the piezoelectric circular diaphragm microgenerator using strain energy method. Piezoelectrics are the intelligent materials that can be used as transducer to convert mechanical energy into electrical energy and vice versa. The aim of this paper is to optimize produced electrical energy from mechanical pressure. Therefore, the circular metal plate equipped with piezoelectric circular patch has been considered with simply and clamped supports. A comprehensive modeling, parametrical study and the effect of the boundary conditions on the performance of the microgenerator have been investigated. The system is under variable pressure from an oscillating pressure source. Results are presented for PZT and PMN-PT piezoelectric materials with steel and aluminum substrates. An optimal value for the radius and thickness of the piezoelectric layer with a special support condition has been obtained.

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Shi, Hongwei, Kai Li, Feng Li, Jianxing Ma, Yubing Tu, Mingsheng Long, Yilin Lu, Weiping Gong, Chunchang Wang i Lei Shan. "Enhanced Piezoelectricity and Thermal Stability of Electrostrain Performance in BiFeO3-Based Lead-Free Ceramics". Nanomaterials 13, nr 5 (5.03.2023): 942. http://dx.doi.org/10.3390/nano13050942.

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BiFeO3–based ceramics possess an advantage over large spontaneous polarization and high Curie temperature, and are thus widely explored in the field of high–temperature lead–free piezoelectrics and actuators. However, poor piezoelectricity/resistivity and thermal stability of electrostrain make them less competitive. To address this problem, (1 − x) (0.65BiFeO3–0.35BaTiO3)–xLa0.5Na0.5TiO3 (BF–BT–xLNT) systems are designed in this work. It is found that piezoelectricity is significantly improved with LNT addition, which is contributed by the phase boundary effect of rhombohedral and pseudocubic phase coexistence. The small–signal and large–signal piezoelectric coefficient (d33 and d33*) peaks at x = 0.02 with 97 pC/N and 303 pm/V, respectively. The relaxor property and resistivity are enhanced as well. This is verified by Rietveld refinement, dielectric/impedance spectroscopy and piezoelectric force microscopy (PFM) technique. Interestingly, a good thermal stability of electrostrain is obtained at x = 0.04 composition with fluctuation η = 31% (Smax'−SRTSRT×100%), in a wide temperature range of 25–180 °C, which is considered as a compromise of negative temperature dependent electrostrain for relaxors and the positive one for ferroelectric matrix. This work provides an implication for designing high–temperature piezoelectrics and stable electrostrain materials.

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Yang, Zhigang, Luntao Dong, Meng Wang, Xingqi Li, Xiaopeng Liu i Guojun Liu. "A miniature piezoelectric pump with high performance". AIP Advances 12, nr 6 (1.06.2022): 065316. http://dx.doi.org/10.1063/5.0094633.

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The high performance and miniaturization of the piezoelectric pump are essential for its application. A single-chamber piezoelectric pump with a circular unimorph piezoelectric actuator and cantilever check valves is proposed in this work, which has good output performance and smaller overall size. The working principle of the piezoelectric pump was described, and the theoretical working characteristics of the cantilever check valve were analyzed in detail. The corresponding experimental prototype was made for the output performance assessment. The experimental results show that the pump has good self-suck ability under well-assembled process conditions, which provides a guarantee for the high flow rate and the output pressure of the piezoelectric pump. The maximum flow rate of 4.5 ml/min is obtained when the pump is driven by an offset sinusoidal voltage of 180Vpp at 50 Hz; the maximum output pressure of the pump reaches 52 kPa under 180Vpp at 150 Hz. In addition, at 70 Hz, 180Vpp, the comprehensive performance of the piezoelectric pump is better, with a flow rate above 3 ml/min and an output pressure over 35 kPa. The proposed piezoelectric pump has the characteristics of simple structure, high performance, small size, and low cost, which can be applied in microelectronic cooling, biomedical, and other fields.

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Matzen, S., S. Gable, N. Lequet, S. Yousfi, K. Rani, T. Maroutian, G. Agnus, H. Bouyanfif i P. Lecoeur. "High piezoelectricity in epitaxial BiFeO₃ microcantilevers". Applied Physics Letters 121, nr 14 (3.10.2022): 142901. http://dx.doi.org/10.1063/5.0105404.

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The large switchable ferroelectric polarization and lead-free composition of BiFeO3 make it a promising candidate as an active material in numerous applications, in particular, in micro-electro-mechanical systems (MEMS) when BiFeO3 is integrated in a thin film form on a silicon substrate. Here, 200-nm-thick Mn-doped BiFeO3 thin films have been epitaxially grown on a SrRuO3/SrTiO3/Si substrate and patterned into microcantilevers as prototype device structures for piezoelectric actuation. The devices demonstrate excellent ferroelectric response with a remanent polarization of 55 μC/cm2. The epitaxial BiFeO3 MEMS exhibit very high piezoelectric response with transverse piezoelectric coefficient d31 reaching 83 pm/V. The BiFeO3 cantilevers show larger electromechanical performance (the ratio of curvature/electric field) than that of state-of-art piezoelectric cantilevers, including well-known PZT (Pb(Zr,Ti)O3) and the hyper-active PMN–PT (Pb(Mg1/3Nb2/3)O3-PbTiO3). In addition, the piezoelectricity in BiFeO3 MEMS is found to depend on the ferroelectric polarization direction, which could originate from the flexoelectric effect and be exploited to further enhance the electromechanical performance of the devices. These results could potentially lead to a replacement of lead-based piezoelectrics by BiFeO3 in many microdevices.

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Huangfu, Geng, Kun Zeng, Binquan Wang, Jie Wang, Zhengqian Fu, Fangfang Xu, Shujun Zhang, Haosu Luo, Dwight Viehland i Yiping Guo. "Giant electric field–induced strain in lead-free piezoceramics". Science 378, nr 6624 (9.12.2022): 1125–30. http://dx.doi.org/10.1126/science.ade2964.

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Piezoelectric actuators are indispensable over a wide range of industries for their fast response and precise displacement. Most commercial piezoelectric actuators contain lead, posing environmental challenges. We show that a giant strain (1.05%) and a large-signal piezoelectric strain coefficient (2100 picometer/volt) are achieved in strontium (Sr)–doped (K,Na)NbO 3 lead-free piezoceramics, being synthesized by the conventional solid-state reaction method without any post treatment. The underlying mechanism responsible for the ultrahigh electrostrain is the interaction between defect dipoles and domain switching. The fatigue resistance, thermal stability, and strain value (0.25%) at 20 kilovolt/centimeter are comparable with or better than those of commercial Pb(Zr,Ti)O 3 -based ceramics, showing great potential for practical applications. This material may provide a lead-free alternative with a simple composition for piezoelectric actuators and a paradigm for the design of high-performance piezoelectrics.

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Fox, David. "A High Performance Piezoelectric Cable". Ferroelectrics 115, nr 4 (marzec 1991): 215–24. http://dx.doi.org/10.1080/00150193.1991.11876608.

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Fox, David. "A high performance piezoelectric cable". Ferroelectrics 115, nr 1 (marzec 1991): 215–24. http://dx.doi.org/10.1080/00150199108222380.

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Taib, Bibi Nadia, Norhayati Sabani, Chan Buan Fei, Mazlee Mazalan i Mohd Azarulsani Md Azidin. "Performance Analysis of Varied Dimensions Piezoelectric Energy Harvester". Applied Mechanics and Materials 754-755 (kwiecień 2015): 481–88. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.481.

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Thin film piezoelectric material plays a vital role in micro-electromechanical systems (MEMS), due to its low power requirements and the availability of high energy harvesting. Zinc oxide is selected for piezoelectric material because of its high piezoelectric coupling coefficient, easy to deposit on silicon substrate and excellent adhesion. Deposited ZnO and Al improve the electrical properties, electrical conductivity and thermal stability. The design, fabrication and experimental test of fabricated MEMS piezoelectric cantilever beams operating in d33 mode were presented in this paper. PVD (Physical Vapor Deposition) was selected as the deposition method for aluminium while spincoating was chosen to deposit ZnO thin film. The piezoelectric cantilever beam is arranged with self-developed experimental setup consisting of DC motor and oscilloscope. Based on experimental result, the longer length of piezoelectric cantilever beam produce higher output voltage at oscilloscope. The piezoelectric cantilevers generated output voltages which were from 2.2 mV to 8.8 mV at 50 Hz operation frequency. One of four samples achieved in range of desired output voltage, 1-3 mV and the rest samples produced a higher output voltage. The output voltage is adequate for a very low power wireless sensing nodes as a substitute energy source to classic batteries.

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Zhang Tian-Le, Huang Xi, Zheng Kai, Zhang Xin-Wu, Wang Yu-Jie, Wu Li-Ming, Zhang Xiao-Qing, Zheng Jie i Zhu Biao. "Influence of polarization voltage on piezoelectric performance of polypropylene piezoelectret films". Acta Physica Sinica 63, nr 15 (2014): 157703. http://dx.doi.org/10.7498/aps.63.157703.

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An, Zhi-Hong, Lin-Min Huang, Jin-Bo Zhao, Qian-Qian Hu, Zhuan-Lan Sun, Huan Zheng i Xiao-Qing Zhang. "High performance laminated FEP/PTFE piezoelectret films for air-borne sound transducers". Acta Physica Sinica 71, nr 2 (2022): 027701. http://dx.doi.org/10.7498/aps.71.20211609.

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Piezoelectret (also known as ferroelectret) is a kind of cellular electret material with strong piezoelectric effect. Such a material exhibits flexibility, low density and small acoustic impedance. Therefore, piezoelectret is an ideal material for air-borne flexible sound transducers. Aiming at high-sensitivity and thermal-stability sound transducers, in this work, laminated fluorinated polyethylene propylene (FEP) and polytetrafluoroethylene (PTFE) piezoelectret film with a regular cellular microstructure is prepared by a procedure involving template-based cellular structure formation and polarization. The results show that the characteristic acoustic impedance of such a laminated FEP/PTFE film is 0.02 MRayl. The quasi-static piezoelectric charge coefficient d33 up to 800 pC/N is achieved in a small applied pressure range. The maximum value of sensitivity of the microphones based on laminated FEP/PTFE piezoelectrets film can reach to 6.4 mV/Pa at 1 kHz. Besides, the frequency response curve of the device is flat in the whole audio range. For an ultrasonic transmitter with a diameter of 20 mm, driven by a voltage of 600 V (Vp), the sound pressure level (SPL) generated by it increases from 80 to 90 dB (Ref. 20 µPA) as frequency increases from 40 to 80 kHz. The thermal stability of the sensitivity for the transducers made of such a laminated FEP/PTFE piezoelectret film is much superior to that of polypropylene (PP) piezoelectret based device. The sensitivity of the present device remains 26% of the initial value after being annealed at 125 ℃ for 211 h. The improvement of thermal stability is attributed to the excellent space charge storage stability of FEP and PTFE.

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Della, C. N., i D. Shu. "Performance of 1–3 piezoelectric composites with porous piezoelectric matrix". Applied Physics Letters 103, nr 13 (23.09.2013): 132905. http://dx.doi.org/10.1063/1.4822109.

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Zhang, Can Can, Jian Guo Sheng i Ping Zeng. "Study of the Manufacture about Nanogenerators and their Performance". Advanced Materials Research 465 (luty 2012): 86–90. http://dx.doi.org/10.4028/www.scientific.net/amr.465.86.

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With the development of science and technology, the smaller sizes generator, the more attention by people. The main purpose of this article is to manufacture three-phase nanogenerator and piezoelectric nanogenerator under vibration, and their working principle are introduced and their performances are studied. The results show that, using the present nanomaterials, three-phase nanogenerator and piezoelectric nanogenerator can be prepared. In ambient vibration condition, piezoelectric materials produce larger rated current and voltage. However, copper laps cutting magnetic line of force produce less rated current and voltage. So the piezoelectric nanogenerator can be separately used to supply power. It may produce higher voltage, current and power if three-phase nanogenerator and piezoelectric nanogenerator in series-parallel connection, and there is commercial value.

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Zhang, Ji Gang, Wen Yan Deng i Jian Han. "Experimental Study about the Performance of the Piezoelectric Friction Damper". Advanced Materials Research 163-167 (grudzień 2010): 2969–72. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2969.

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Because of its excellent energy dissipation capacity, friction damper has a wide application in engineering structure, while its use is restricted by constant frictional force. Piezoelectric ceramic actuator has electrochromic deformation ability, by the use of this advantage to combine piezoelectric ceramic actuator with friction damper to form piezoelectric friction damper. This paper conducts some experiments, to study the force output performance and response time of piezoelectric friction damper as well as its hysteretic behavior. The results show piezoelectric friction damper has good force output capacity with the input voltage increases, and the hysteretic behavior is stable, which almost has no relevance with loading frequency.

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Huang, Fang Sheng, Zhi Hua Feng, Yu Ting Ma i Qiao Sheng Pan. "Investigation on high-frequency performance of spiral-shaped trapezoidal piezoelectric cantilever". Modern Physics Letters B 32, nr 17 (18.06.2018): 1850187. http://dx.doi.org/10.1142/s0217984918501877.

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Trapezoidal structure has been proposed for construction of piezoelectric cantilever to increase inherent frequency. To further break through the limitation on frequency value, trapezoidal piezoelectric cantilever is rolled into spiral-shaped piezoelectric cantilever with identical effective length in this study, which is verified in COMSOL simulations and experiments. A prototype shows that after rolling the straight shape into a spiral shape for the trapezoidal piezoelectric cantilever, the first inherent frequency promotes 4.5 times from 98100 Hz to 441,900 Hz, which is consistent with theoretic analysis. The spiral-shaped trapezoidal piezoelectric cantilever is suitable for working as an actuator in micro flapping-wing aircraft.

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Wang, Aochen, Ming Hu, Liwei Zhou i Xiaoyong Qiang. "Self-Powered Wearable Pressure Sensors with Enhanced Piezoelectric Properties of Aligned P(VDF-TrFE)/MWCNT Composites for Monitoring Human Physiological and Muscle Motion Signs". Nanomaterials 8, nr 12 (7.12.2018): 1021. http://dx.doi.org/10.3390/nano8121021.

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Self-powered operation, flexibility, excellent mechanical properties, and ultra-high sensitivity are highly desired properties for pressure sensors in human health monitoring and anthropomorphic robotic systems. Piezoelectric pressure sensors, with enhanced electromechanical performance to effectively distinguish multiple mechanical stimuli (including pressing, stretching, bending, and twisting), have attracted interest to precisely acquire the weak signals of the human body. In this work, we prepared a poly(vinylidene fluoride-trifluoroethylene)/ multi-walled carbon nanotube (P(VDF-TrFE)/MWCNT) composite by an electrospinning process and stretched it to achieve alignment of the polymer chains. The composite membrane demonstrated excellent piezoelectricy, favorable mechanical strength, and high sensitivity. The piezoelectric coefficient d33 value was approximately 50 pm/V, the Young’s modulus was ~0.986 GPa, and the sensitivity was ~540 mV/N. The resulting composite membrane was employed as a piezoelectric pressure sensor to monitor small physiological signals including pulse, breath, and small motions of muscle and joints such as swallowing, chewing, and finger and wrist movements. Moderate doping with carbon nanotubes had a positive impact on the formation of the β phase of the piezoelectric device, and the piezoelectric pressure sensor has the potential for application in health care systems and smart wearable devices.

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Cao, Hong Xia, Chuang Zhang, Qing Quan Liu i You Bao Wang. "Elastomechanical Study of Magnetoeletric Coupling in Bilayer of Lithium Zinc Ferrite and Lead Zirconate Titanate". Advanced Materials Research 602-604 (grudzień 2012): 813–20. http://dx.doi.org/10.4028/www.scientific.net/amr.602-604.813.

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A theoretical model based on the constitutive equations of piezoelectrics and magnetostrictor is introduced to discuss the magnetoelectric (ME) coupling in freebody bilayer containing magnetostrictive and piezoelectric phases. The ME coupling at low frequency of Ni0.8Zn0.2Fe2O4–PZT bilayer have been studied by using the model and the corresponding material parameters of individual phases. The results show that the ME voltage coefficients can increase to a maximum at a given volume fraction of piezoelectric phase. An approximately linear increase of the maximum has been obtained with strengthening interface coupling. Analysis shows that large magnetostriction, appropriate volume fraction and ideal interface coupling are key ingredients for obtaining excellent ME performance.

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Huang, Fang Sheng, Zhi Hua Feng, Yu Ting Ma, Qiao Sheng Pan, Lian Sheng Zhang, Yong Bin Liu i Liang Guo He. "High-frequency performance for a spiral-shaped piezoelectric bimorph". Modern Physics Letters B 32, nr 10 (10.04.2018): 1850111. http://dx.doi.org/10.1142/s0217984918501117.

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Piezoelectric cantilever is suitable as an actuator for micro-flapping-wing aircraft. Higher resonant frequency brings about stronger flight energy, and the flight amplitude can be compensated by displacement–amplification mechanism, such as lever. To obtain a higher resonant frequency, straight piezoelectric bimorph was rolled into spiral-shaped piezoelectric bimorph with identical effective length in this study, which is verified in COMSOL simulations. Simulation results show that compared with the straight piezoelectric bimorph, the spiral-shaped piezoelectric bimorph with two turns has higher inherent frequencies (from 204.79 Hz to 504.84 Hz in terms of axial oscillation mode, and from 319.77 Hz to 704.48 Hz in terms of tangential torsional mode). The spiral-shaped piezoelectric bimorph is fabricated by a precise laser cutting process and consists of two turns with effective length of 60 mm, width of 2.5 mm, and thickness of 1.6 mm, respectively. With the excitation voltage of 100 Vpp applying an electric field across the thickness of the bimorph, the tip displacement of the actuator in the axial oscillation and tangential torsional modes are 85 [Formula: see text]m and 15 [Formula: see text]m, respectively.

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Wang, Qian, Hong-Ze Yan, Xian Zhao i Chun-Ming Wang. "Polymorphic Phase Transition and Piezoelectric Performance of BaTiO3-CaSnO3 Solid Solutions". Actuators 10, nr 6 (13.06.2021): 129. http://dx.doi.org/10.3390/act10060129.

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BaTiO3-based piezoelectric ceramics have attracted considerable attention in recent years due to their tunable phase structures and good piezoelectric properties. In this work, the (1 − x)BaTiO3−xCaSnO3 (0.00 ≤ x ≤ 0.16, abbreviated as BT−xCS) solid solutions, were prepared by traditional solid-state reaction methods. The phase transitions, microstructure, dielectric, piezoelectric, and ferroelectric properties of BT-xCS have been investigated in detail. The coexistence of rhombohedral, orthorhombic, and tetragonal phases near room temperature, i.e., polymorphic phase transition (PPT), has been confirmed by X-ray diffraction and temperature-dependent dielectric measurements in the compositions range of 0.06 ≤ x ≤ 0.10. The multiphase coexistence near room temperature provides more spontaneous polarization vectors and facilitates the process of polarization rotation and extension by an external electric field, which is conducive to the enhancement of piezoelectric response. Remarkably, the composition of BT-0.08CS exhibits optimized piezoelectric properties with a piezoelectric coefficient d33 of 620 pC/N, electromechanical coupling factors kp of 58%, kt of 40%, and a piezoelectric strain coefficient d33* of 950 pm/V.

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Liu, Wei, Yunlai Shi, Zhijun Sun i Li Zhang. "Poling-Free Hydroxyapatite/Polylactide Nanogenerator with Improved Piezoelectricity for Energy Harvesting". Micromachines 13, nr 6 (31.05.2022): 889. http://dx.doi.org/10.3390/mi13060889.

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Polylactide-based piezoelectric nanogenerators were designed and fabricated with improved piezoelectric performances by blending polylactide with hydroxyapatite. The addition of hydroxyapatite significantly improves the crystallinity of polylactide and helps to form hydrogen bonds, which further improved the piezoelectric output performance of these piezoelectric nanogenerators with over three times the open circuit voltage compared with that of pure-polylactide-based devices. Such excellent piezoelectricity of hydroxyapatite/polylactide-based nanogenerators give them great potential for energy harvesting fields.

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Zhang, Kai, De Shi Wang i Qi Zheng Zhou. "Study on the Electromechanical Coupling Performance of Bimorph Piezoelectric Cantilever". Applied Mechanics and Materials 302 (luty 2013): 447–51. http://dx.doi.org/10.4028/www.scientific.net/amm.302.447.

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In order to accurately predict the electromechanical coupling performance of bimorph piezoelectric cantilever structure. Based on Euler-Bernoulli beam assumption, the expression of output voltage response of the bimorph piezoelectric cantilever is written, the output voltage curve of unit acceleration excitation are obtained, the law of the output voltage influenced by the structure parameters of the cantilever beam length, width and thickness of the metal beam and the piezoelectric layer are analyzed, the results will play an important theoretical and engineering significance in the development of high efficient piezoelectric energy harvesting device.

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Deng, Weili, Long Jin i Weiqing Yang. "Piezoelectric Materials Design for High-Performance Sensing". Crystals 13, nr 7 (5.07.2023): 1063. http://dx.doi.org/10.3390/cryst13071063.

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Piezoelectric materials can realize the mutual conversion of electrical energy and mechanical energy, and are widely used in electronic devices such as piezoelectric filters, micro-displacers, actuators, and sensors, which have crucial uses in the fields of information and communication, biomedicine, military defense, etc [...]

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Sun, Min, Dong Yu Xu i Shi Feng Huang. "Performance Analysis of the 1-3 Piezoelectric Composites and Transducer Fabrication". Materials Science Forum 687 (czerwiec 2011): 339–42. http://dx.doi.org/10.4028/www.scientific.net/msf.687.339.

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1-3 polymer-based piezoelectric composites were fabricated using epoxy as the matrix by the cut-filling method. The influences of PMN volume fraction on the piezoelectric and dielectric properties of the composite were analyzed, and then the piezoelectric composite was fabricated to transducer whose properties were also analyzed. The results indicate that with increasing the PMN volume fraction, both the hydrostatic piezoelectric voltage gh and hydrostatic figures of merit dh·gh of the composite decrease, while the relative dielectric constant εr increases. The hydrostatic piezoelectric strain dh has the optimum value in the PMN volume fraction range of 40%-60%. The resonant frequency of transducer in water is 306.5 kHz and anti-resonant frequency is 352.6 kHz.

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Hu, H. P., Z. J. Cui i J. G. Cao. "Performance of a Piezoelectric Bimorph Harvester with Variable Width". Journal of Mechanics 23, nr 3 (wrzesień 2007): 197–202. http://dx.doi.org/10.1017/s1727719100001222.

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AbstractThis article analyzes the performance of a piezoelectric energy harvester in the flexural mode for scavenging ambient vibration energy. The energy harvester consists of a piezoelectric bimorph plate with a variable width. A theoretical study is performed and the computational results show that the output power density increases initially, reaches a maximum, and then decreases monotonically with the increasing width, underscoring the importance for the width design of the scavenging structure. Further analysis indicates that the peak of output power density is determined by both the bimorph deformation amplitude and the efficiency in scavenging-energy. The analysis for this simplified model piezoelectric harvester provides a framework for further development on design guidelines for piezoelectric energy harvesters of optimal performance.

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Zhang, Jigang, Wenyan Deng i Zhuwen Yue. "Experimental Study about the Hysteretic Performance of the Pall-typed Piezoelectric Friction Damper". Open Civil Engineering Journal 6, nr 1 (6.04.2012): 48–54. http://dx.doi.org/10.2174/1874149501206010048.

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Because of its excellent energy dissipation capacity, friction damper has a wide application in engineering structure, while its use is restricted by constant frictional force. Piezoelectric ceramic actuator has electrochromic deformation ability, by the use of this advantage to combine piezoelectric ceramic actuator with friction damper to form piezoelectric friction damper. This paper conducts some experiments, firstly to study the force output performance, response time of ordinary piezoelectric friction damper, hysteretic behavior as well as its energy dissipation, secondly to study the performance of the Pall-typed piezoelectric friction damper which is consisted by Pall-typed frictional damper and piezoelectric ceramic actuator. The results show piezoelectric friction dampers have good force output capacity and they increase with the input voltage increases; the dampers have a quick response and a short response time; the hysteretic behaviors are stable, which almost has no relevance with loading frequency.

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QIU, J. H., K. J. ZHU i H. L. JI. "FABRICATION AND PERFORMANCE OF HIGH TEMPERATURE STYLE FUNCTIONALLY GRADED PIEZOELECTRIC BENDING ACTUATORS". Modern Physics Letters B 23, nr 03 (30.01.2009): 433–36. http://dx.doi.org/10.1142/s0217984909018588.

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To avoid the delamination of bimorph actuator and enhance the performance of the room-temperature type functionally graded (RTFG) piezoelectric bending actuator, the high temperature type FG (HTFG) piezoelectric bending actuator was designed and fabricated. The material compositions with different dielectric and piezoelectric constants were selected from the Pb ( Ni 1/3 N b 2/3) O 3- PbZrO 3- PbTiO 3 (PNN-PZ-PT) family, and used as the five layers in the HTFG piezoelectric actuator. Compared with the FG actuator, the HTFG actuator has advantages for applications at high temperature. The durability of the fabricated HTFG piezoelectric actuators was measured in a vibration test and compared with that of the bimorph actuator to evaluate the improvement of performance. The results show that the durability of the HTFG piezoelectric actuators is much higher than that of the bimorph actuator.

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He, Zhongchen, François Rault, Astha Vishwakarma, Elham Mohsenzadeh i Fabien Salaün. "High-Aligned PVDF Nanofibers with a High Electroactive Phase Prepared by Systematically Optimizing the Solution Property and Process Parameters of Electrospinning". Coatings 12, nr 9 (7.09.2022): 1310. http://dx.doi.org/10.3390/coatings12091310.

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Poly(vinylidene fluoride) (PVDF)-electrosprayed nanofibers have been the subject of much research due to their flexibility and piezoelectric properties compared to other piezoelectrics, for example, ceramics or other polymeric materials. The piezoelectric performance of PVDF is mainly related to the presence of β-phase. This study aims to determine the influence of working and formulation parameters on the generation of β-phase, morphology, and crystal structure of PVDF nanofibers. In addition, this research innovatively analyzes the effect of the dispersion state of PVDF molecular chains in the solvent on the electrospinning results. The morphology and crystal structure of PVDF nanofibers were determined using scanning electron microscopy (SEM), differential scanning calorimetry (DSC), and Fourier transform infrared spectroscopy (FTIR). Beadless nanofibers are obtained when the PVDF concentration reaches the semi-diluted regime entangled in dimethylformamide (DMF) or DMF/acetone solution. The optimization of the process parameters (static collector, tip to collector distance—25 cm, flow rate—1 mL/h, applied voltage—20 kV) allows the increase in the β-phase fraction from 68.3% ± 1.2% to 94.5% ± 0.6% for a PVDF concentration of 25 w/v% in a DMF/acetone mixture (2/3 v/v). With these same parameters applied to a rotating collector, it was observed that the piezoelectric performance is at maximum for a maximum β-phase fraction of 90.6% ± 1.1%, obtained for a rotational speed of 200 rpm. The effect of orientation of PVDF nanofibers on piezoelectric properties was quantitatively discussed for the first time; the piezoelectric properties are independent of the alignment of the nanofibers.

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Zhang, Dandan, Xiuli Zhang, Xingjia Li, Huiping Wang, Xiaodong Sang, Guodong Zhu i Yuhei Yeung. "Enhanced piezoelectric performance of PVDF/BiCl3/ZnO nanofiber-based piezoelectric nanogenerator". European Polymer Journal 166 (marzec 2022): 110956. http://dx.doi.org/10.1016/j.eurpolymj.2021.110956.

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Liu, Hai Peng, Shi Qiao Gao i Lei Jin. "Study on the Energy Harvesting Performance of PE Cantilever Beam". Key Engineering Materials 645-646 (maj 2015): 1189–94. http://dx.doi.org/10.4028/www.scientific.net/kem.645-646.1189.

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Harvesting ambient vibration energy through piezoelectric (PE) means is a popular energy harvesting technique. The merit of applying PE means to supply energy for microelectronic devices is that they can reduce the battery weight and possibly make the device self-powered by harvesting mechanical energy. This investigation will examine the energy generating performance of miniature PE cantilever beam through theoretical modeling, simulation and experiment testing. Through the theoretical analysis of the piezoelectric energy harvesting structure, the expression of open circuit voltage output is obtained. Using ANSYS software, the working performance of piezoelectric cantilever beam is analyzed. On the basis of theoretical analysis and simulation optimization, a set of experimental system is established to test the energy harvesting performance of the piezoelectric cantilever beam. The testing result shows that the harvested energy by the piezoelectric cantilever beam could supply electrical power to some micro electrical devices.

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Camargo-Chávez, J. E., S. Arceo-Díaz, E. E. Bricio-Barrios i R. E. Chávez-Valdez. "Piezoelectric mathematical modeling; technological feasibility in the generation and storage of electric charge". Journal of Physics: Conference Series 2159, nr 1 (1.01.2022): 012009. http://dx.doi.org/10.1088/1742-6596/2159/1/012009.

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Abstract Emerging technologies are efficient alternatives for satisfying the growing demand for sustainable and cheap energy sources. Piezoelectrics are one of the most promising energy sources derived from emerging technologies. These materials are capable of converting mechanical energy into electricity or vice versa. Piezoelectrics have been used for almost a hundred years to generate electrical and sound pulses. However, the use of piezoelectrics for power generation is constrained by the cost associated with equipment and infrastructure. This problem has been addressed through mathematical models that relate the physical and electrical properties of the piezoelectric material with the voltage generated. Although these models have high performance, they do not incorporate voltage rectification and electrical charge storage stages. This work presents a mathematical model that describes the relationship of the physical and electromechanical properties of a system employing a piezoelectric for energy generation. The voltage of the system and the charge stored in a capacitor are calculated through this model. Also, contour diagrams are presented as a tool for facilitating the efficiency of energy generation.

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Zeng, Ping, Li’an Li, Jingshi Dong, Guangming Cheng, Junwu Kan i Feng Xu. "Structure design and experimental study on single-bimorph double-acting check-valve piezoelectric pump". Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, nr 14 (16.07.2015): 2339–44. http://dx.doi.org/10.1177/0954406215596357.

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A novel piezoelectric pump called single-bimorph double-acting check-valve piezoelectric pump was proposed in this paper in order to improve the output performance of the single-bimorph single-chamber piezoelectric membrane pump. The constituent parts of the newly designed piezoelectric pump have no difference with the single-bimorph single-chamber check-valve piezoelectric membrane pump except the structural difference of the pump body. There are two serial-connection pump chambers which are formed by the two sides of the piezoelectric bimorph and the pump body of the newly designed piezoelectric pump. The new piezoelectric pump was fabricated, and output performance was experimentally investigated. The maximum flow rate against zero back pressure of the new pump was 318 ml/min and the pumping pressure reached 40.5 kPa at the operating voltage of 90 V. The output power was roughly twice that of the single-bimorph single-chamber check-valve piezoelectric membrane pump. The testing results proved that the new piezoelectric pump could enhance the output performance and the energy conversion efficiency of the piezoelectric bimorph comparing with the single-bimorph single-chamber check-valve piezoelectric membrane pump.

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Liu, Zichao, Wei Pan, Changhou Lu i Yongtao Zhang. "Numerical analysis on the static performance of a new piezoelectric membrane restrictor". Industrial Lubrication and Tribology 68, nr 5 (8.08.2016): 521–29. http://dx.doi.org/10.1108/ilt-07-2015-0098.

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Purpose This paper aims to establish an accurate mathematical model of a piezoelectric membrane restrictor that can be applied to control the shaft’s centerline orbit. Design/methodology/approach The methodology uses three coupled equations to establish a mathematical model of the piezoelectric membrane restrictor – Reynolds equation, the membrane deformation equation and the flow rate equation. A data identification method is used to propose the flow rate formulas for the piezoelectric membrane restrictor. Findings It has been found that the structural parameters, the membrane center deformation and the inlet and outlet pressures of the piezoelectric membrane restrictor have an effect on the static performance of the restrictor. The identified flow rate result of the piezoelectric membrane restrictor is consistent with the models. Originality/value The paper provides an accurate mathematical model of the piezoelectric membrane restrictor which can also be applied to other membrane restrictors.

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Sheng, Jian Guo, Ping Zeng i Can Can Zhang. "Study of the Manufacture about Piezoelectric Nanogenerator under Micro Vibration and its Performance". Applied Mechanics and Materials 105-107 (wrzesień 2011): 2109–12. http://dx.doi.org/10.4028/www.scientific.net/amm.105-107.2109.

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With the development of science and technology, the smaller sizes generator, the more attention by people. The main purpose of this article is to manufacture piezoelectric nanogenerator under micro vibration and its working principle is introduced and its performance is studied. The results show that, using the present nanomaterials, piezoelectric materials can be prepared. When its wind in copper laps, under the situation of micro pulse vibration its can turn into electrical energy, thus yield piezoelectric nanogenerators. In ambient vibration condition, piezoelectric materials produce larger rated current and voltage. However, copper laps cutting magnetic line of force produce less rated current and voltage. So the piezoelectric nanogenerators can be separately used to supply power. If multiple piezoelectric nanogenerator in tandem may produce higher voltage, current and power, which possess commercial value.

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Zhou, Gongbo, Houlian Wang, Zhencai Zhu, Linghua Huang i Wei Li. "Performance Analysis of Wind-Induced Piezoelectric Vibration Bimorph Cantilever for Rotating Machinery". Shock and Vibration 2015 (2015): 1–10. http://dx.doi.org/10.1155/2015/216353.

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Harvesting the energy contained in the running environment of rotating machinery would be a good way to supplement energy to the wireless sensor. In this paper, we take piezoelectric bimorph cantilever beam with parallel connection mode as energy collector and analyze the factors which can influence the generation performance. First, a modal response theory model is built. Second, the static analysis, modal analysis, and piezoelectric harmonic response analysis of the wind-induced piezoelectric bimorph cantilever beam are given in detail. Finally, an experiment is also conducted. The results show that wind-induced piezoelectric bimorph cantilever beam has low resonant frequency and stable output under the first modal mode and can achieve the maximum output voltage under the resonant condition. The output voltage increases with the increase of the length and width of wind-induced piezoelectric bimorph cantilever beam, but the latter increasing amplitude is relatively smaller. In addition, the output voltage decreases with the increase of the thickness and the ratio of metal substrate to piezoelectric patches thickness. The experiment showed that the voltage amplitude generated by the piezoelectric bimorph cantilever beam can reach the value simulated in ANSYS, which is suitable for actual working conditions.

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Du, Cong, Pengfei Liu, Hailu Yang, Gengfu Jiang, Linbing Wang i Markus Oeser. "Finite Element Modeling and Performance Evaluation of Piezoelectric Energy Harvesters with Various Piezoelectric Unit Distributions". Materials 14, nr 6 (14.03.2021): 1405. http://dx.doi.org/10.3390/ma14061405.

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The piezoelectric energy harvester (PEH) is a device for recycling wasted mechanical energy from pavements. To evaluate energy collecting efficiency of PEHs with various piezoelectric unit distributions, finite element (FE) models of the PEHs were developed in this study. The PEH was a square of 30 cm × 30 cm with 7 cm in thickness, which was designed according to the contact area between tire and pavement. Within the PEHs, piezoelectric ceramics (PZT-5H) were used as the core piezoelectric units in the PEHs. A total of three distributions of the piezoelectric units were considered, which were 3 × 3, 3 × 4, and 4 × 4, respectively. For each distribution, two diameters of the piezoelectric units were considered to investigate the influence of the cross section area. The electrical potential, total electrical energy and maximum von Mises stress were compared based on the computational results. Due to the non-uniformity of the stress distribution in PEHs, more electrical energy can be generated by more distributions and smaller diameters of the piezoelectric units; meanwhile, more piezoelectric unit distributions cause a higher electrical potential difference between the edge and center positions. For the same distribution, the piezoelectric units with smaller diameter produce higher electrical potential and energy, but also induce higher stress concentration in the piezoelectric units near the edge.

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Liu, Yan Hui, Ping Tan, Fu Lin Zhou, Yong Feng Du i Wei Ming Yan. "Numerical Analysis and Performance Test of Bidirectional Piezoelectric Control Device". Advanced Materials Research 163-167 (grudzień 2010): 2977–82. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.2977.

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Based on the configuration and mechanical characteristics of piezoelectric actuator, the bidirectional piezoelectric variable friction control device which can produce control force in two orthogonal directions was designed and the relation equation of control force with input voltage for this control device was presented. Finally, one piezoelectric variable friction control device was manufactured and performance test of this control device was processed. The result of numerical analysis and experiment shows the bidirectional piezoelectric variable friction control device can produce semi-active control force fast, and the performance of this control device do not change when the frequency of input excitation varies and the control force of this control device has stable mechanical properties.

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Gong, Jun Jie, Ying Ying Xu, Zhi Lin Ruan i Long Chao Dai. "Experimental Investigation of Piezoelectric Bimorph Cantilever on Vibration Energy Harvesting Performance". Advanced Materials Research 655-657 (styczeń 2013): 816–22. http://dx.doi.org/10.4028/www.scientific.net/amr.655-657.816.

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The bimorph piezoelectric cantilever model for vibration energy harvesting was established to analyse its natural frequency and generating performance according to Euler-Bernoulli theory. The influence of the length and thickness of piezoelectric cantilever on natural frequency and generating voltage was discussed by computing the cantilever equivalent stiffness. Experimental investigation was performed to measure its natural frequency and output generating voltage of bimorph piezoelectric cantilever, and the effect of cantilever with different proof mass and structural parameters on generating performance was also analysed. Theoretical results of bimorph piezoelectric cantilever are compared with experimental results qualitatively, good correlations are observed.

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Hajheidari, Peyman, Ion Stiharu i Rama Bhat. "Performance of non-uniform functionally graded piezoelectric energy harvester beams". Journal of Intelligent Material Systems and Structures 31, nr 13 (12.06.2020): 1604–16. http://dx.doi.org/10.1177/1045389x20930083.

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The appearance of functionally graded piezoelectric materials has solved the lamination problem of the conventional piezoelectric structures. Functionally graded piezoelectric materials are the new materials with unexplored capabilities. This article theoretically investigates the effects of non-uniformity on the performance of the functionally graded piezoelectric material cantilever beams subjected to harmonic excitation. The governing equations are derived based on Timoshenko and Euler–Bernoulli beam theories. The finite element method with the application of superconvergent element is employed here for the discretization and the vibration analysis of the system. This model is validated by comparing the numerical results with the experimental results of piezoelectric energy harvesters of conventional shapes available in the open literature. Parametric studies are carried out with respect to the effects of tapering ratios, the degree of non-uniformity, load resistance, and the volume fraction parameter on the electrical output power and the fundamental resonance frequency. It was observed that the application of diverging beams noticeably enhances the power output per mass of piezoelectric element extracted while decreases the natural frequency which is advantageous for scavenging energy from ambient surroundings. The results reveal that there is an optimal value for the non-homogeneous parameter leading to the maximized harvested energy under different operating conditions.

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Li, Cong. "Road Performance of Common Piezoelectric Transducer for Asphalt Pavement Energy Harvesting". Applied Mechanics and Materials 744-746 (marzec 2015): 1491–94. http://dx.doi.org/10.4028/www.scientific.net/amm.744-746.1491.

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The discussion in the paper is focused on energy transition efficiency, stiffness and intensity of common piezoelectric transducers in the following aspects. Firstly, we have found out that bridge piezoelectric transducers possess high energy transition efficiency and the similar stiffness to asphalt pavement through comparing and analyzing road performance of several common piezoelectric transducers. Thus, we hold the view that it is applicable for energy collection of asphalt pavement and will be analyzed subsequently. Secondly, we have analyzed energy transition efficiency and stiffness characteristics of arc bridge piezoelectric transducer and rectangular bridge piezoelectric transducer in laboratory test. The results show that, under the same load stress, arc transducers are better than rectangular transducers in terms of energy transition efficiency; but comparing with rectangular transducers, arc transducers are more prone to be destroyed, which is not helpful for bearing traffic load.

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Ikei, Alec, James Wissman, Kaushik Sampath, Gregory Yesner i Syed N. Qadri. "Tunable In Situ 3D-Printed PVDF-TrFE Piezoelectric Arrays". Sensors 21, nr 15 (24.07.2021): 5032. http://dx.doi.org/10.3390/s21155032.

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In the functional 3D-printing field, poly(vinylidene fluoride-co-trifluoroethylene) (PVDF-TrFE) has been shown to be a more promising choice of material over polyvinylidene fluoride (PVDF), due to its ability to be poled to a high level of piezoelectric performance without a large mechanical strain ratio. In this work, a novel presentation of in situ 3D printing and poling of PVDF-TrFE is shown with a d33 performance of up to 18 pC N−1, more than an order of magnitude larger than previously reported in situ poled polymer piezoelectrics. This finding paves the way forward for pressure sensors with much higher sensitivity and accuracy. In addition, the ability of in situ pole sensors to demonstrate different performance levels is shown in a fully 3D-printed five-element sensor array, accelerating and increasing the design space for complex sensing arrays. The in situ poled sample performance was compared to the performance of samples prepared through an ex situ corona poling process.

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Ardelean, Emil V., Daniel G. Cole i Robert L. Clark. "High Performance ‘‘V-stack’’ Piezoelectric Actuator". Journal of Intelligent Material Systems and Structures 15, nr 11 (listopad 2004): 879–89. http://dx.doi.org/10.1177/1045389x04045150.

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Ewere, Felix, i Gang Wang. "Performance of galloping piezoelectric energy harvesters". Journal of Intelligent Material Systems and Structures 25, nr 14 (19.11.2013): 1693–704. http://dx.doi.org/10.1177/1045389x13505251.

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MASUBUCHI, Hisashi, i Keisuke MATSUMOTO. "Performance Test of the Piezoelectric Fan". Proceedings of the JSME annual meeting 2004.2 (2004): 479–80. http://dx.doi.org/10.1299/jsmemecjo.2004.2.0_479.

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Yaghootkar, Bahareh, Soheil Azimi i Behraad Bahreyni. "A High-Performance Piezoelectric Vibration Sensor". IEEE Sensors Journal 17, nr 13 (1.07.2017): 4005–12. http://dx.doi.org/10.1109/jsen.2017.2707063.

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Kan, Junwu, Kehong Tang, Hongwei Zhao, Chenghui Shao i Guoren Zhu. "Performance analysis of piezoelectric bimorph generator". Frontiers of Mechanical Engineering in China 3, nr 2 (8.04.2008): 151–57. http://dx.doi.org/10.1007/s11465-008-0039-9.

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