Log in

Relevant bibliographies by topics / Relaxor perovskite / Journal articles

To see the other types of publications on this topic, follow the link: Relaxor perovskite.

Journal articles on the topic 'Relaxor perovskite'

Author: Grafiati

Published: 9 March 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Relaxor perovskite.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Lu, Chung-Hsin, and Wen-Jeng Hwang. "Phase Evolution and Dielectric Characterization of Lead Nickel Niobate–lead Zirconate Ceramics Prepared from the Hydrothermally Derived Precursors." Journal of Materials Research 14, no. 4 (April 1999): 1364–70. http://dx.doi.org/10.1557/jmr.1999.0186.

Full text

Abstract:

The perovskite compounds with the composition of (1 – x) Pb(Ni1/3Nb2/3)O3 –xPbZrO3 have been successfully prepared from hydrothermally treated precursors. During calcination, the primary intermediate compound is pyrochlore phase in the Pb(Ni1/3Nb2/3)O3-rich composition, while it is PbZrO3 on the PbZrO3-rich side. On calcination at 800 °C, all precursors convert into perovskite phases. In the formed solid solutions, increasing PbZrO3 content results in a rise in the apparent Curie temperature as well as the maximum dielectric permittivity. The Pb(Ni1/3Nb2/3)O3-rich perovskites (x < 0.8) possess the characteristics of relaxor ferroelectrics. With increasing PbZrO3 content, the dielectric response gradually becomes less diffuse and dispersive, reflecting a reduction in the relaxor characteristics of the formed perovskites.

APA, Harvard, Vancouver, ISO, and other styles

2

Blinc, R., B. Zalar, and Alan Gregorovic. "NMR and the local structure of relaxors." Science of Sintering 34, no. 1 (2002): 3–11. http://dx.doi.org/10.2298/sos0201003b.

Full text

Abstract:

The relaxor transition in cubic perovskite relaxors (PMN, PSN and PST) and tungsten bronze relaxor (SBN) has been studied by NMR. The observed spectra are composed of a narrow -1/2 ? 1/2 central transition superimposed on a broad background due to satellite transitions. The chemical heterogeneity, responsible for relaxor properties, is reflected here in the structure of the central transition part. The latter is composed of two components, one due to ordered and the other due to disordered regions. Despite of the fact that the macroscopic symmetry does not change when relaxor transition occurs, a non-zero quadruple coupling constant determined from NMR clearly demonstrates the broken local symmetry.

APA, Harvard, Vancouver, ISO, and other styles

3

Xiong, Wei, Hangfeng Zhang, Zimeng Hu, Michael J. Reece, and Haixue Yan. "Low thermal conductivity in A-site high entropy perovskite relaxor ferroelectric." Applied Physics Letters 121, no. 11 (September 12, 2022): 112901. http://dx.doi.org/10.1063/5.0102088.

Full text

Abstract:

An A-site disordered high entropy perovskite (Pb1/6Ba1/6Sr1/6Ca1/6Na1/6Bi1/6)TiO3 (PBSCNBi) ceramic was prepared by a solid-state reaction method. XRD and scanning electron microscopy-energy dispersive x ray confirmed a single-phase tetragonal solid solution. Dielectric and hysteresis loop measurements showed relaxor ferroelectricity at room temperature; Curie Weiss fitting gives a Burns temperature (Tb) of 123 °C, and Vogel–Fulcher fitting gives a freezing temperature (Tf) of −67.24 °C, which confirms the room-temperature relaxor ferroelectricity of PBSCNBi. This is attributed to local chemical inhomogeneities in the high entropy ceramics. PBSCNBi also has a low thermal conductivity (1.15 W m−1 K−1 at room temperature) compared to all of its constituent simple perovskites (e.g., BaTiO3, PbTiO3, SrTiO3 CaTiO3, and Na1/2Bi1/2TiO3 in the range of 25–100 °C), which is attributed to the enhanced phonon scattering by both polar nanoregions and the mass contrast effect in the multi-element perovskite. This work demonstrates the great potential of making A-site high entropy ceramics with relaxor ferroelectric properties.

APA, Harvard, Vancouver, ISO, and other styles

4

Osman, Rozana A. M., Mohd Sobri Idris, Zul Azhar Zahid Jamal, Sanna Taking, Syarifah Norfaezah Sabki, Prabakaran A. L. Poopalan, Mohd Natashah Norizan, and Ili Salwani Mohamad. "Ferroelectric and Relaxor Ferroelectric to Paralectric Transition Based on Lead Magnesium Niobate (PMN) Materials." Advanced Materials Research 795 (September 2013): 658–63. http://dx.doi.org/10.4028/www.scientific.net/amr.795.658.

Full text

Abstract:

First ferroelectric materials were found in Rochelle salt was in a perovskite structure. Lead Magnesium Niobate (PMN) is a perovskites with a formula of PbMg1/3Nb2/3O3 (PMN) and are typical representatives for most of all ferroelectrics materials with relaxor characteristic. It posses high dielectric permittivity which nearly ~ 20,000[ with a broad dielectric permittivity characteristic, known as relaxor ferroelectric below room temperature. Some of the researcher might think that the transition from relaxor ferroelectric to paraelectric is similar to the characteristic as observed from ferroelectric to paraelectric, but it is not necessary. The puzzling is how do we categorise them. How is the domain structure look like typically in ceramic materials.

APA, Harvard, Vancouver, ISO, and other styles

5

Tyunina, M., and J. Levoska. "Thin Films of Perovskite Relaxor Ferroelectrics." Ferroelectrics 298, no. 1 (January 2004): 353–59. http://dx.doi.org/10.1080/00150190490423868.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Elissalde, C., A. Simon, and J. Ravez. "A new perovskite oxyfluoride relaxor ferroelectric." Ferroelectrics 199, no. 1 (July 1997): 217–21. http://dx.doi.org/10.1080/00150199708213442.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Sivasubramanian, Venkatasubramanian, Sarveswaran Ganesamoorthy, and Seiji Kojima. "Anomalies of Brillouin Light Scattering in Selected Perovskite Relaxor Ferroelectric Crystals." Materials 16, no. 2 (January 8, 2023): 605. http://dx.doi.org/10.3390/ma16020605.

Full text

Abstract:

Compositionally disordered perovskite compounds have been one of the exotic topics of research during the past several years. Colossal piezoelectric and electrostrictive effects have been observed in disordered perovskite ferroelectric materials. The key ingredient in the physical behavior of disordered perovskites is the nucleation and growth of the local dipolar regions called polar nanoregions (PNRs). PNRs begin to nucleate far above the temperature of the dielectric maximum Tm and exhibit varied relaxation behavior with temperature. The evidence for the existence of various stages in the relaxation dynamics of PNRs was revealed through the study of the temperature evolution of optical phonons by Raman scattering. The quasi-static regime of PNRs is characterized by the strong coupling between the local polarization and strain with the local structural phase transition and the critical slowing of the relaxation time. Strong anomalies in the frequency and the width of the acoustic phonons, and emergence of the central peak in the quasi-static region of the relaxation dynamics of PNRs have been observed through Brillouin scattering studies. In this review, we discuss the anomalies observed in Brillouin scattering in selected disordered perovskite ferroelectrics crystals such as Pb(Mg1/3Ta2/3)O3, Pb(Sc1/2Ta1/2)O3, 0.65PIN-0.35PT and Sr0.97Ca0.03TiO3 to understand dynamical behavior of PNRs.

APA, Harvard, Vancouver, ISO, and other styles

8

Kreisel, J., P. Bouvier, P. A. Thomas, and A. M. Glazer. "Phase transitions in perovskite-type relaxor ferroelectrics." Acta Crystallographica Section A Foundations of Crystallography 58, s1 (August 6, 2002): c249. http://dx.doi.org/10.1107/s0108767302094953.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Riemer, Lukas M., Li Jin, Hana Uršič, Mojca Otonicar, Tadej Rojac, and Dragan Damjanovic. "Dielectric and electro-mechanic nonlinearities in perovskite oxide ferroelectrics, relaxors, and relaxor ferroelectrics." Journal of Applied Physics 129, no. 5 (February 7, 2021): 054101. http://dx.doi.org/10.1063/5.0035859.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sekar, Michael M. A., Arvind Halliyal, and K. C. Patil. "Synthesis, characterization, and properties of lead-based relaxor ferroelectrics." Journal of Materials Research 11, no. 5 (May 1996): 1210–18. http://dx.doi.org/10.1557/jmr.1996.0155.

Full text

Abstract:

Lead-based relaxor ferroelectrics such as Pb(Mg1/3Nb2/3)O3 (PMN), Pb(Zn1/3Nb2/3)O3 (PZN), and their solid solutions with BaTiO3 and PbTiO3 have been prepared by a solution combustion process which involves metal nitrates/oxalate and tetraformal trisazine (TFTA) at 350 °C. Thermal evolution of perovskite relaxors has been investigated at different temperatures of calcination using the powder x-ray diffraction method. Particles are fine and sinter-active at low temperature (1050 °C). Both particulate and dielectric properties are compared.

APA, Harvard, Vancouver, ISO, and other styles

11

Stringer, C. J., T. R. Shrout, and C. A. Randall. "High-temperature perovskite relaxor ferroelectrics: A comparative study." Journal of Applied Physics 101, no. 5 (March 2007): 054107. http://dx.doi.org/10.1063/1.2537753.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Zenkner, Mandy, Ulrich Straube, and Günther Schmidt. "Ferroelectric to Relaxor Crossover in Perovskite-type Systems." Ferroelectrics 460, no. 1 (February 17, 2014): 1–10. http://dx.doi.org/10.1080/00150193.2014.874856.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Fan, Huiqing, Zhuo Xu, Liangying Zhang, and Xi Yao. "Dielectric behavior of poled complex perovskite relaxor ferroelectrics." Chinese Science Bulletin 42, no. 2 (January 1997): 169–72. http://dx.doi.org/10.1007/bf03182796.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Bokov, A. A., and Z. G. Ye. "Recent progress in relaxor ferroelectrics with perovskite structure." Journal of Materials Science 41, no. 1 (January 2006): 31–52. http://dx.doi.org/10.1007/s10853-005-5915-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Srisombat, Laongnuan, Orawan Khamman, Rattikorn Yimnirun, Supon Ananta, and T. Randall Lee. "XPS Characterization of Perovskite Relaxor PNN Ceramics Prepared by Corundum Precursor Method." Key Engineering Materials 421-422 (December 2009): 415–18. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.415.

Full text

Abstract:

Perovskite ferroelectric PNN ceramics have been obtained from oxides by sintering in air, using a two-stage process with corundum Ni4Nb2O9 precursor. Under suitable firing condition, XRD analysis revealed that the ceramics consist of 100% perovskite phase. The SEM, EDX, and XPS techniques were employed to investigate the chemical composition of the surfaces of the PNN ceramics. Fluctuation in chemical composition, precipitation of NiO and the Pb-Ni-Nb-O phase different from perovskite were found.

APA, Harvard, Vancouver, ISO, and other styles

16

HLINKA, J. "DO WE NEED THE ETHER OF POLAR NANOREGIONS?" Journal of Advanced Dielectrics 02, no. 02 (April 2012): 1241006. http://dx.doi.org/10.1142/s2010135x12410068.

Full text

Abstract:

This paper deals with possible experimental signatures of the so-called polar nanoregions in lead-based perovskite relaxors. It outlines both traditional and alternative approaches to these signatures. It is argued that the concept of polar nanoregions is useful but largely speculative. Polar nanoregions are compared with ferroelectric nanodomains. Qualitative explanation of the principal "relaxor" properties of PMN are discussed in both frameworks. It is argued that polarization as a vector may not be well defined at any nanometric region in PMN Crystal.

APA, Harvard, Vancouver, ISO, and other styles

17

Sung, C. M., A. J. Gorton, J. Chen, M. P. Harmer, and D. M. Smyth. "AEM study of perovskite Pb(Zn1/3Nb2/3)O3 ferroelectric relaxor." Proceedings, annual meeting, Electron Microscopy Society of America 47 (August 6, 1989): 514–15. http://dx.doi.org/10.1017/s0424820100154548.

Full text

Abstract:

Lead zinc niobate (Pb(Zn1/3Nb2/3)O3 : PZN) is a ferroelectric relaxor with perovskite-related stmcture exhibiting a diffuse phase transition at ˜140°C. Single crystals of PZN have shown excellent dielectric, electro-optic and electrostrictive properties. However, attempts to achieve these properties in polycrystalline ceramic PZN samples have failed. Using conventional powder processing it has not been possible to synthesize a monophase perovskite stmcture, due to the pervasion of lead niobate pyrochlore phases. It is thought that the pyrochlore phases are the detrimental factor of most importance. However, lack of information on pyrochlore structures and on the PZN perovskite phase prevents full characterization of the microstructures of ceramic samples. To understand more completely the composition and stmcture of the various phases present in PZN ceramics, an AEM study of polycrystalline samples has been undertaken. Furthermore a clarification of the microchemical ordering situation in PZN has been achieved.

APA, Harvard, Vancouver, ISO, and other styles

18

Kim, Su-Chan, and Hyun M. Jang. "Pb()O3-type Perovskites: Part II. Short-range Order Parameter as a Criterion of the Distinction Between Relaxor and Normal Ferroelectrics." Journal of Materials Research 12, no. 8 (August 1997): 2127–33. http://dx.doi.org/10.1557/jmr.1997.0285.

Full text

Abstract:

A classification scheme of Pb()O3-type perovskites with respect to the B-site order parameters was proposed based on the theoretical calculation of the short-range order parameter (σ) using the pair-correlation model. The calculated order parameters predict that a Pb()O3-type perovskite without any charge difference between B′ and B″ cations [e.g., Pb(Zr1/2Ti1/2)O3 (PZT)] is represented by a completely disordered state with the absence of a finite coherence length. On the other hand, a Pb()O3-type perovskite system having different ionic charges is characterized either by the short-range ordering with a nanoscale coherence length or by the macroscopic long-range ordering, depending on the magnitude of ionic charge difference between B′ and B″ ions. The normal ferroelectricity in Pb()O3-type complex perovskites was then correlated either with a completely disordered state (σ = 0) or with a perfectly ordered state (σ = 0), whereas the relaxor behavior was attributed to the nanoscale short-range ordering (0 < σ < 1) in the configuration of the B-site cations.

APA, Harvard, Vancouver, ISO, and other styles

19

Srikanth, V., and E. C. Subbarao. "Chemical reactions of lead magnesium niobate titanate in the presence of a glass." Journal of Materials Research 6, no. 6 (June 1991): 1308–23. http://dx.doi.org/10.1557/jmr.1991.1308.

Full text

Abstract:

A relaxor ferroelectric of composition 0.93Pb(Mg1/3Nb2/3)O3-0.07PbTiO3 was sintered with 3 wt.% commercial sealing glass at 750 °C for 30 min to achieve ≥95% of theoretical density and a nearly pure perovskite phase. At higher glass additions (up to 20 wt.%), higher sintering temperatures (up to 800 °C), and longer sintering times (up to 4 h), the amount of perovskite (PMN type) decreases and that of pyrochlore (6PbO · MgO · 3Nb2O5 or 3PbO · 2Nb2O5) increases. On sintering at 800 °C for 4 h no perovskite phase is present in compositions with even 1% glass addition. The reaction of glass with the PMN phase was found to lead to the disappearance of the perovskite. Addition of 0.1 to 0.6 wt.% MgO to compositions containing 1 and 3 wt.% glass (and balance PMN-PT) results in essentially pure PMN perovskite phase on sintering at 700–800 °C for 30–240 min, confirming that the reaction of glass with PMN and depletion of MgO from PMN can be arrested. The sintered ceramics exhibit relaxor behavior and possess dielectric properties essentially commensurate with the phase composition.

APA, Harvard, Vancouver, ISO, and other styles

20

Gui, Hong, Binglin Gu, and Xiaowen Zhang. "Distribution of relaxation times in perovskite‐type relaxor ferroelectrics." Journal of Applied Physics 78, no. 3 (August 1995): 1934–39. http://dx.doi.org/10.1063/1.360231.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Kojima, Seiji, and Shinya Tsukada. "Micro-Brillouin Scattering of Relaxor Ferroelectrics with Perovskite Structure." Ferroelectrics 405, no. 1 (October 29, 2010): 32–38. http://dx.doi.org/10.1080/00150193.2010.482885.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Lin, Y. Q., X. M. Chen, and X. Q. Liu. "Relaxor-like dielectric behavior in La2NiMnO6 double perovskite ceramics." Solid State Communications 149, no. 19-20 (May 2009): 784–87. http://dx.doi.org/10.1016/j.ssc.2009.02.028.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Scarisoreanu, N., M. Dinescu, F. Craciun, P. Verardi, A. Moldovan, A. Purice, and C. Galassi. "Pulsed laser deposition of perovskite relaxor ferroelectric thin films." Applied Surface Science 252, no. 13 (April 2006): 4553–57. http://dx.doi.org/10.1016/j.apsusc.2005.07.140.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Malibert, C., B. Dkhil, J. M. Kiat, D. Durand, J. F. Bérar, and A. Spasojevic-de Biré. "Order and disorder in the relaxor ferroelectric perovskite (PSN): comparison with simple perovskites and." Journal of Physics: Condensed Matter 9, no. 35 (September 1, 1997): 7485–500. http://dx.doi.org/10.1088/0953-8984/9/35/022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Šimėnas, Mantas, Sergejus Balčiūnas, Aneta Ciupa, Linas Vilčiauskas, Džiugas Jablonskas, Martynas Kinka, Adam Sieradzki, Vytautas Samulionis, Mirosław Ma̧czka, and Jūras Banys. "Elucidation of dipolar dynamics and the nature of structural phases in the [(CH3)2NH2][Zn(HCOO)3] hybrid perovskite framework." Journal of Materials Chemistry C 7, no. 22 (2019): 6779–85. http://dx.doi.org/10.1039/c9tc01275c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Fan, Huiqing, Biaolin Peng, and Qi Zhang. "Preparation and Field-Induced Electrical Properties of Perovskite Relaxor Ferroelectrics." Transactions on Electrical and Electronic Materials 16, no. 1 (February 25, 2015): 1–4. http://dx.doi.org/10.4313/teem.2015.16.1.1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Kusumoto, Keiji, and Tadashi Sekiya. "Processing and properties of relaxor ferroelectric PNN-PT perovskite ceramics." Ferroelectrics 240, no. 1 (January 2000): 1593–600. http://dx.doi.org/10.1080/00150190008227987.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Rayevsky, I. P., M. S. Novikov, L. A. Petrukhina, O. A. Gubaidulina, A. Ye Kuimov, and M. A. Malitskaya. "Relaxor perovskite multilayer actuators and capacitors with internal ceramic electrodes." Ferroelectrics 131, no. 1 (June 1992): 327–29. http://dx.doi.org/10.1080/00150199208223434.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Nambu, Shinji, and Koshiro Sugimoto. "Theory of diffuse phase transition in complex perovskite relaxor ferroelectrics." Ferroelectrics 198, no. 1 (June 1997): 11–30. http://dx.doi.org/10.1080/00150199708228334.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Thomas, Pamela, Jessica Marshall, and David Walker. "Perovskite BaTiO3 doped with pyrochlore bismuth zinc niobate – a new perovskite relaxor ferroelectric BZN-BT." Acta Crystallographica Section A Foundations and Advances 75, a2 (August 18, 2019): e283-e283. http://dx.doi.org/10.1107/s2053273319092738.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Wang, Zujian, and Xifa Long. "Non-relaxor responses of highly ordered Pb(Sc1/2Nb1/2)O3 crystals." CrystEngComm 16, no. 29 (2014): 6588–92. http://dx.doi.org/10.1039/c4ce00307a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Lan, De Jun, Yi Chen, Qiang Chen, Yi Hang Jiang, Ding Quan Xiao, and Jian Guo Zhu. "The Crystalline, Dielectric and Pyroelectric Properties of (1-x)Pb(Sc_0.5Ta_0.5)O₃-xPb(Zr_0.52Ti_0.48)O₃ Relaxor Ferroelectric Ceramics." Key Engineering Materials 336-338 (April 2007): 169–72. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.169.

Full text

Abstract:

The (1-x)PST-xPZT(PSTZT) complex perovskite relaxor ferroelectric ceramics were prepared by wolframite precursor process(named two-step-sintering method, TSSM) and conventional oxides mixing method (named one-step-sintering method, OSSM), respectively. The experimental results demonstrated that pure perovskite PSTZT ceramics could be acquired by OSSM or TSSM. The temperature dependence of permittivity and dielectric loss of PSTZT ceramics indicated that PSTZT ceramics are relaxor ferroelectric ceramics with a complete diffusive phase transition. The pyroelectric properties of PSTZT ceramics prepared by OSSM and TSSM were also investigated via quiet-state method. It was found that the larger the x value of (1-x)PST-xPZT is, the lower the pyroelectric coefficient of PSTZT ceramics is. The pyroelectric coefficient of 0.9PST-0.1PZT ceramics is about (8~25) × 10-8C/cm2·K at room temperature. The pyroelectric figure of merit of PSTZT ceramics was also discussed.

APA, Harvard, Vancouver, ISO, and other styles

33

Wang, Caiyan, Zhengqian Fu, Nan Zhang, Marek Paściak, Jian Zhuang, Zenghui Liu, Wei Ren, and Zuo-guang Ye. "Determination of chemical ordering in the complex perovskite Pb(Cd1/3Nb2/3)O3." IUCrJ 5, no. 6 (October 24, 2018): 808–15. http://dx.doi.org/10.1107/s2052252518013805.

Full text

Abstract:

Pure-phase Pb(Cd1/3Nb2/3)O3 (PCN) single crystals and ceramics with a complex perovskite structure are synthesized for the first time. The local chemical ordering in PCN has been investigated by X-ray diffraction (including diffuse scattering) and Cs-corrected transmission electron microscopy experiments. It is concluded that the PCN samples have large coherent chemical ordering regions that even extend to the long range, and the ordering model is consistent with β-type chemical ordered regions. The antiphase domain boundaries were also observed. Two dielectric anomaly peaks were found in these two types of samples, one of which indicates possible relaxor behaviour. The novel structure of the completely ordered regions and its relationship with the electrical properties make PCN a unique material for the fundamental understanding of chemically substituted perovskites.

APA, Harvard, Vancouver, ISO, and other styles

34

Zhang, Min-Hao, Jun-Lei Qi, Yi-Qian Liu, Shun Lan, Zi-Xi Luo, Hao Pan, and Yuan-Hua Lin. "High energy storage capability of perovskite relaxor ferroelectrics via hierarchical optimization." Rare Metals 41, no. 3 (November 27, 2021): 730–44. http://dx.doi.org/10.1007/s12598-021-01869-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Zhou, Donghua H., Gina L. Hoatson, and Robert L. Vold. "Local structure in perovskite relaxor ferroelectrics: high-resolution 93Nb 3QMAS NMR." Journal of Magnetic Resonance 167, no. 2 (April 2004): 242–52. http://dx.doi.org/10.1016/j.jmr.2003.12.015.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Simon, Annie, and Jean Ravez. "New lead-free non-stoichiometric perovskite relaxor ceramics derived from BaTiO3." Solid State Sciences 5, no. 11-12 (November 2003): 1459–64. http://dx.doi.org/10.1016/s1293-2558(03)00194-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Gui, Hong, Binglin Gu, and Xiaowen Zhang. "Theoretical study of polarization behaviors in complex perovskite-type relaxor ferroelectrics." Ferroelectrics 197, no. 1 (June 1997): 63–66. http://dx.doi.org/10.1080/00150199708008385.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

ANANTA, S., R. YIMNIRUN, and O. KHAMMAN. "EFFECT OF NICKEL NIOBATE B-SITE PRECURSORS ON PHASE FORMATION, MICROSTRUCTURE AND DIELECTRIC PROPERTIES OF PEROVSKITE PNN CERAMICS." Functional Materials Letters 01, no. 03 (December 2008): 229–33. http://dx.doi.org/10.1142/s1793604708000307.

Full text

Abstract:

Relaxor perovskite lead nickel niobate (PNN) ceramics were fabricated by using B-site precursor method, in which both columbite- NiNb 2 O 6 and corundum- Ni 4 Nb 2 O 9 were separately employed as nickel niobate B-site precursors. It has been found that optimization of sintering condition can successfully lead to highly dense and pure PNN ceramics in both routes. Between the two B-site precursor routes, pure perovskite PNN ceramics with slightly better densification and dielectric properties can be produced by using the columbite-route.

APA, Harvard, Vancouver, ISO, and other styles

39

Eršte, A., A. Kupec, B. Kmet, B. Malič, and V. Bobnar. "Stable dielectric response in lead-free relaxor K0.5Na0.5NbO3–SrTiO3 thin films." Journal of Advanced Dielectrics 04, no. 02 (April 2014): 1450012. http://dx.doi.org/10.1142/s2010135x1450012x.

Full text

Abstract:

K 0.5 Na 0.5 NbO 3– SrTiO 3 (KNN–STO) thin films of different compositions were prepared by the chemical solution deposition method. While structural investigations confirmed the formation of perovskite solid solution in all developed films, dielectric experiments revealed a relaxor broad dispersive maximum in the sample with 15 mol% of STO, exhibiting for a thin film high ε′ ~ 330 at ~ 210 K. The history-dependent effects of this relaxor sample were compared to those of KNN–STO ceramics and, furthermore, shown to be much weaker than in widely used lead-based ferroelectric and relaxor ( Pb , La )( Zr , Ti ) O 3 ceramics: While fatigue endurance results revealed a slight drop in polarization after 3 × 105 switching cycles, the results of aging of the dielectric constant revealed no notable decrease in its values after 106 s.

APA, Harvard, Vancouver, ISO, and other styles

40

Zhu, W. Z., M. Yan, P. Q. Mantas, J. L. Baptista, and A. L. Kholkin. "Effect of Lanthanum-doping on the Dielectric Properties of Pb(Fe1/2Ta1/2)O3 Relaxor Ferroelectrics." Journal of Materials Research 17, no. 7 (July 2002): 1779–84. http://dx.doi.org/10.1557/jmr.2002.0263.

Full text

Abstract:

This paper reports the influence of lanthanum-doping on the dielectric behavior of Pb(Fe1/2Ta1/2)O3 relaxor ferroelectrics, where the La ions are incorporated into the B-site of the perovskite constructing unit and the resultant charge imbalance is compensated by the presence of free charge carriers (holes). The formulated compositions were fabricated using one-step preparation method, and a nearly pure perovskite phase was attained, as verified by XRD analysis. Both the dielectric permittivity maximum (ε′max) and the temperature at which ε′max occurs (Tm) are progressively reduced by La-doping. The degree of frequency dispersion, however, is promoted, indicating the weakened ferroelectric couplings among the oxygen octahedra as a result of lanthanum incorporation. Moreover, the breadth of paraelectric to ferroelectric phase transition is broadened with an increase in lanthanum content, due to enhanced inhomogeneity and increase in the number of B-site cations. Frequency spectroscopy at a certain temperature below Tm reveals a widening of the size distribution of ferroelectric nanodomains, which is characteristic of relaxor microstructure, by La-doping.

APA, Harvard, Vancouver, ISO, and other styles

41

Chen, Jin, Hui Qing Fan, Xiu Li Chen, and Shao Jun Qiu. "Preparations and Characterizations of Perovskite PMN Ceramics by Using a One-Step Calcination Method." Advanced Materials Research 26-28 (October 2007): 255–58. http://dx.doi.org/10.4028/www.scientific.net/amr.26-28.255.

Full text

Abstract:

A relaxor ferroelectric material, Pb(Mg1/3Nb2/3)O3 (PMN) powder with a pyrochlore-free phase, was prepared by using a one-step calcinations method. The pyrochlore phase was prevented by coating Mg(OH)2 on Nb2O5 particles. Pure-perovskite PMN powder was synthesized by a single calcination of the coating powder mixed with appropriate amounts of PbO at 900 oC for 2 h. The pyrochlore-free perovskite PMN powders were sintered to 96.9% density at 1100 oC. The sintered PMN ceramics exhibited a dielectric constant maximum of ~11 700 at room temperature at a frequency of 1 kHz.

APA, Harvard, Vancouver, ISO, and other styles

42

Fan, Hui Qing. "Growth and Characterizations of Relaxor-Based Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ Thin Films by Sol-Gel Method." Key Engineering Materials 280-283 (February 2007): 839–44. http://dx.doi.org/10.4028/www.scientific.net/kem.280-283.839.

Full text

Abstract:

Relaxor-based 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-PT) thin films were grown epitaxially on silicon substrates by sol-gel method and PbO cover coat technique, and investigated by x-ray diffraction, auger electron spectroscopy, scanning electron microscopy, and transmission electron microscopy. The phase development and microstrure evolution of the PMN-PT film were significantly affected by the final annealing temperature and time. A perovskite PMN-PT film was obtained after annealing at 850oC for 1 min. Then, highly <100>-oriented and textured PMN-PT films could be achieved by using a LaNiO3 perovskite template.

APA, Harvard, Vancouver, ISO, and other styles

43

Veerapandiyan, Vignaswaran, Federica Benes, Theresa Gindel, and Marco Deluca. "Strategies to Improve the Energy Storage Properties of Perovskite Lead-Free Relaxor Ferroelectrics: A Review." Materials 13, no. 24 (December 16, 2020): 5742. http://dx.doi.org/10.3390/ma13245742.

Full text

Abstract:

Electrical energy storage systems (EESSs) with high energy density and power density are essential for the effective miniaturization of future electronic devices. Among different EESSs available in the market, dielectric capacitors relying on swift electronic and ionic polarization-based mechanisms to store and deliver energy already demonstrate high power densities. However, different intrinsic and extrinsic contributions to energy dissipations prevent ceramic-based dielectric capacitors from reaching high recoverable energy density levels. Interestingly, relaxor ferroelectric-based dielectric capacitors, because of their low remnant polarization, show relatively high energy density and thus display great potential for applications requiring high energy density properties. In this study, some of the main strategies to improve the energy density properties of perovskite lead-free relaxor systems are reviewed, including (i) chemical modification at different crystallographic sites, (ii) chemical additives that do not target lattice sites, and (iii) novel processing approaches dedicated to bulk ceramics, thick and thin films, respectively. Recent advancements are summarized concerning the search for relaxor materials with superior energy density properties and the appropriate choice of both composition and processing routes to match various applications’ needs. Finally, future trends in computationally-aided materials design are presented.

APA, Harvard, Vancouver, ISO, and other styles

44

Das, Rutuparna, and Ram Choudhary. "Structure, dielectric and electrical properties of relaxor lead-free double perovskite: Nd2NiMnO6." Processing and Application of Ceramics 13, no. 1 (2019): 1–11. http://dx.doi.org/10.2298/pac1901001d.

Full text

Abstract:

In this paper, dielectric relaxor, impedance, AC conductivity and electrical modulus of double perovskite Nd2NiMnO6, prepared by a solid state reaction method and sintered at 1250?C, have been reported in the wide temperature (25-150?C) and frequency (1 kHz-1MHz) ranges. From the preliminary X-ray structural analysis, it is found that the structure of the material is monoclinic. In the study of the temperature dependence of the dielectric constant, the relaxor behaviour of the material is observed. Such type of behaviour is explained by a modified Curie-Weiss and a Vogel-Fulcher law. By analysing Nyquist plots, the existence of grain and grain boundary effects is established. The non-Debye type of relaxation is investigated by the analysis of complex impedance and the modulus data. From the study of impedance data, it is found that the grain resistance is reduced with the increase in temperature indicating the existence of negative temperature coefficient of resistance (NTCR) behaviour in the material which also matches with temperature versus AC conductivity plots. From these results, it may be concluded that this compound may have extreme potential for different high temperature applications.

APA, Harvard, Vancouver, ISO, and other styles

45

Xia, Wen, Li Hua Xu, Han Zhang, and Jun Jun Song. "Preparation of Pb(Mg_1/3Nb_2/3)O₃ Relaxor Ferroelectric by Sol-Gel Route." Key Engineering Materials 336-338 (April 2007): 46–48. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.46.

Full text

Abstract:

Without addition of any thermodynamically stable perovskite compound such as PbTiO3, Pb(Mg1/3Nb2/3)O3 was fabricated by a new sol-gel route, and the processing parameter was studied. The result showed that the chelating effect of ammonium citrate was relatively better than that of citric acid in this system. When the ratio of ammonium citrate to Nb2O5 was 8.33, the colloid of Nb2O5·nH2O was in state of transparency. The effects of heat treatment on the formation of perovskite phase of Pb(Mg1/3Nb2/3)O3 powders were characterized by X-Ray Diffraction (XRD) method. With increasing heat treatment temperature or holding time, pyrochlore phase turned into perovskite phase gradually, and after second calcination, the content of perovskite phase increased significantly from 54% to 72%.

APA, Harvard, Vancouver, ISO, and other styles

46

Таланов, М. В., and Л. А. Резниченко. "Фазовые диаграммы твердых растворов сегнетоэлектриков-релаксоров по данным диэлектрической спектроскопии." Физика твердого тела 60, no. 3 (2018): 435. http://dx.doi.org/10.21883/ftt.2018.03.45540.10d.

Full text

Abstract:

AbstractThe dielectric spectra of Pb(_1– z )Ba_ z (Mg_1/3Nb_2/3)_ m (Zn_1/3Nb_2/3)_ y (Ni_1/3Nb_2/3)_ n TixO_3 ( x = 0.25–0.4, y = 0.1130–0.0842, m = 0.4844–0.1298, n = 0.1266–0.4726, z = 0–0.15) ceramics with substitution in both A and B crystallographic positions of the perovskite structure are studied. The system demonstrates a transition from the relaxor state to the normal ferroelectric state in both cases: when the concentration of lead titanate grows and the concentration of barium is reduced. On the basis of experimental results, the x–T and z–T phase diagrams are plotted. Despite different crystal chemical reasons of the relaxor state emergence in the investigated solid solutions, their diagrams demonstrate an evident similarity. We have revealed the disappearance of the temperature hysteresis at the transition to the relaxor state in both cases, which has allowed us to make an assumption of the existence of tricritical points on the corresponding diagrams.

APA, Harvard, Vancouver, ISO, and other styles

47

Pan, Tianze, Ji Zhang, Dongxiao Che, Zhengyu Wang, Jiajia Wang, Jing Wang, and Yaojin Wang. "Improved capacitive energy storage in sodium niobate-based relaxor antiferroelectric ceramics." Applied Physics Letters 122, no. 7 (February 13, 2023): 072902. http://dx.doi.org/10.1063/5.0134282.

Full text

Abstract:

Ceramic-based dielectric capacitors have become an attractive issue due to their wide applications in current pulsed-/high-power electronic devices. Antiferroelectric ceramics generally exhibit ultrahigh energy density owing to their giant polarization activated by antiferroelectric–ferroelectric phase transition under a high electric field but suffer from large hysteresis, meanwhile giving rise to low efficiency. Herein, by introducing perovskite compound Sr(Fe0.5Ta0.5)O3 into an antiferroelectric NaNbO3 matrix, a stabilized antiferroelectric phase and an improved relaxor behavior are observed. That is, relaxor antiferroelectric ceramics are constructed. Accordingly, a double polarization–electric field ( P–E) loop becomes slimmer with increasing incorporation of dopants, leading to an ultrahigh recoverable energy density of 11.5 J/cm3, an energy storage efficiency of 86.2%, outstanding frequency/cycling/thermal reliability, and charge–discharge properties in 0.90NaNbO3-0.10Sr(Fe0.5Ta0.5)O3 ceramics. This work reveals that inducing the relaxor behavior in antiferroelectric materials is an effective route to improve their capacitive energy storage.

APA, Harvard, Vancouver, ISO, and other styles

48

Feng, Li, Haiyan Guo, and Zuo-Guang Ye. "Magnetic ordering in relaxor ferroelectric (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3 single crystals." Journal of Materials Research 22, no. 8 (August 2007): 2116–24. http://dx.doi.org/10.1557/jmr.2007.0265.

Full text

Abstract:

Single crystals of the perovskite solid solution (1 − x)Pb(Fe2/3W1/3)O3–xPbTiO3, with x = 0, 0.07, 0.27, and 0.75, have been synthesized by the high-temperature solution growth using PbO as flux and characterized by x-ray diffraction and dielectric and magnetic measurements. The crystal structure at room temperature changes from a pseudocubic to a tetragonal phase with the PbTiO3 (PT) content increasing to x ⩾ 0.27. As the amount of PT increases, the relaxor ferroelectric behavior of Pb(Fe2/3W1/3)O3 (PFW) is transformed toward a normal ferroelectric state with sharp and nondispersive peaks of dielectric permittivity at TC. Two types of magnetic orderings are observed on the temperature dependence of the magnetization in the crystals with x ⩽ 0.27. This behavior is explained based on the relationships among the magnetic ordering, perovskite structure, composition, and relaxor ferroelectric properties. Furthermore, the macroscopic magnetization of the system was measured under the application of a magnetic field, which demonstrates different magnetic behavior associated with the weakly ferromagnetic, antiferromagnetic, and paramagnetic ordering in the temperature range of 2 to 390 K. Interestingly, the low-temperature ferromagnetism is enhanced by the addition of ferroelectric PT up to x = 0.27.

APA, Harvard, Vancouver, ISO, and other styles

49

Anirban, Sk, and Abhigyan Dutta. "Structure, small polaron hopping conduction and relaxor behavior of Gd2NiMnO6 double perovskite." Journal of Physics and Chemistry of Solids 159 (December 2021): 110292. http://dx.doi.org/10.1016/j.jpcs.2021.110292.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

SIMON, ANNIE, and JEAN RAVEZ. "NEW LEAD-FREE PEROVSKITE RELAXOR CERAMICS DERIVED FROM BaTiO3 AND CONTAINING SCANDIUM." Journal of Advanced Dielectrics 01, no. 02 (April 2011): 251–55. http://dx.doi.org/10.1142/s2010135x11000240.

Full text

Abstract:

New lead-free compositions of AMO3 perovskite type were synthesized in the BaTi 1-x( Nb 1/2 Sc 1/2)x O 3(0 ≤ x ≤ 1) system, with regards to the comparable electronic configurations of the various 6-coordinated cations. Special solid state reaction was used. The effect of the replacement of titanium by scandium and niobium in the B-site on structural and dielectric properties was investigated. For this, we have used X-ray diffraction and dielectric characterizations. Dielectric measurements performed on ceramics with 0 ≤ x ≤ 0.25 composition revealed that the small change in composition from BaTiO3 has a strong influence on the dielectric properties: fast decreasing of the ferroelectric transition temperature for low values of x and evolution from classical ferroelectric for 0 ≤ x ≤ 0.075 to relaxor behavior for 0.075 < x ≤ 0.25.

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!