Bibliografias temáticas / Aerosol deposition (ADM)

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Literatura científica selecionada sobre o tema "Aerosol deposition (ADM)"

Autor: Grafiati

Publicado: 1 de fevereiro de 2025

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Artigos de revistas sobre o assunto "Aerosol deposition (ADM)"

Mihara, Kensuke, Takuya Hoshina, Hirofumi Kakemoto, Hiroaki Takeda e Takaaki Tsurumi. "Effects of Pretreatments on Deposition Rate of Films in Aerosol Deposition Method". Key Engineering Materials 421-422 (dezembro de 2009): 165–68. http://dx.doi.org/10.4028/www.scientific.net/kem.421-422.165.

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In the aerosol deposition method (ADM), we investigated an influence of pre-treatments for barium titanate powders as raw material on the deposition rate of thick films. By sieving and drying the powder, deposition rate of the films fabricated by ADM was effectively enhanced. On the other hand, heating the powders at 400-800°C, the resulting powders caused low deposition rate of the films. When a planetary milling was performed prior to charge aerosol chamber, the deposition rate of the films was four times higher than that in deposition using the powder without milling. By changing the milling rotation rate, we control size of agglomerated particles consisting of powders, which results in the control of deposition rate of the films.

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Akedo, Jun. "Aerosol Deposition Method for Fabrication of Nano Crystal Ceramic Layer". Materials Science Forum 449-452 (março de 2004): 43–48. http://dx.doi.org/10.4028/www.scientific.net/msf.449-452.43.

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Aerosol deposition method (ADM) for shock-consolidation of fine ceramics powder to form dense and hard layers is reported. Submicron ceramic particles were accelerated by gas flow in the nozzle up to velocity of several hundred m/s. During interaction with substrate, these particles formed thick (10 ~ 100 µm), dense, uniform and hard ceramics layers. Depositions were fulfilled at room temperature. Every layer has polycrystalline structure with nano-meter order scale.􀀂 The results of fabrications, microstructure, mechanical and electrical properties of oxides (α-Al2O3; Pb(Zr0.52,Ti0.48)O3 etc.) and non-oxides materials are presented.

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Uemichi, Yuta, Koji Nishikawa, Yuuki Sato e Shinzo Yoshikado. "Fabrication and Evaluation of Al₂O₃ Films Using the Aerosol Deposition Method". Key Engineering Materials 485 (julho de 2011): 211–14. http://dx.doi.org/10.4028/www.scientific.net/kem.485.211.

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Equipment was designed for the application of Al2O3 thin films by the aerosol deposition method (ADM) at room temperature. Al2O3 film could be deposited on Pyrex-glass, indium tin oxide (ITO), polyvinyl chloride (PVC) plastic, single crystal silicon, and sapphire substrates. The films had the same crystal structure as the raw material particles and were highly transparent. The breakdown electric field of the Al2O3 film for the ADM was more than 35 kV/mm.

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Leupold, Nico, Michael Schubert, Jaroslaw Kita e Ralf Moos. "Influence of high temperature annealing on the dielectric properties of alumina films prepared by the aerosol deposition method". Functional Materials Letters 11, n.º 02 (abril de 2018): 1850022. http://dx.doi.org/10.1142/s1793604718500224.

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The aerosol deposition method (ADM) is a novel coating technique that allows to fabricate dense and nanocrystalline ceramic films at room temperature. To investigate the dielectric properties of aerosol deposited alumina films at high temperatures and the influence of annealing on them, the temperature was increased in steps of 100[Formula: see text]C from 200[Formula: see text]C to 900[Formula: see text]C and subsequently cooled down stepwise again. At each step, the dielectric properties were measured by impedance spectroscopy between 50[Formula: see text]mHz and 200[Formula: see text]kHz. During the heating steps, the relative permittivity and also the loss tangent showed a disordered behavior with various maxima in the loss tangent. After reaching 900[Formula: see text]C, during cooling, the behavior was more ordered, and the loss tangent exhibited only one maximum that appeared at lower frequencies. Overall, the annealing reduces the loss tangent at low frequencies and low temperatures. The origin of this behavior could lie in the annealing of defects, which are incorporated into the layer when the particles hit the surface of the substrate and crack while being deposited via ADM following the room temperature impact consolidation mechanism (RTIC).

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Ma, Ji Feng, Yuan Hua Lin, Ce Wen Nan e Takaaki Tsurumi. "Preparation and Properties of CaCu₃Ti₄O₁₂ Thick Film by Aerosol Deposition Method". Key Engineering Materials 368-372 (fevereiro de 2008): 126–28. http://dx.doi.org/10.4028/www.scientific.net/kem.368-372.126.

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CaCu3Ti4O12 (CCTO) ceramic thick films have been prepared on Copper substrate, using ceramic powders by an aerosol deposition method (ADM). The ceramic powders are prepared by traditional solid state reaction processing at 1100 oC for 5 h. X-ray diffraction and scanning electron microscopy are used to investigate the microstructure and the phase composition of the deposited films. The results indicate that thick films are pure CCTO phase and homogenous. The dielectric impedance spectra indicate that the dielectric constant of CCTO thick film can reach 3×103.

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Schubert, Michaela, Jaroslaw Kita, Christian Münch e Ralf Moos. "Analysis of the characteristics of thick-film NTC thermistor devices manufactured by screen-printing and firing technique and by room temperature aerosol deposition method (ADM)". Functional Materials Letters 10, n.º 06 (dezembro de 2017): 1750073. http://dx.doi.org/10.1142/s1793604717500734.

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The study compares thick-film NTC thermistor devices, produced by the screen-printing (and firing) technique and by the Aerosol Deposition Method (ADM) at room temperature. The devices are compared with respect to film quality (optical, mechanical) and to the negative temperature coefficient of resistance (NTCR) parameters [Formula: see text] and [Formula: see text]. While the screen-printed films are porous, the Aerosol Deposited (AD) films are characterized by high tightness, mechanical stability, and a production at room temperature. The electrical analysis shows that the AD films reach the [Formula: see text]- and [Formula: see text]-values of bulk NTCRs from literature after a moderate tempering step below 400[Formula: see text]C in air. The screen-printed films show [Formula: see text]-values that are comparable to the values of bulk NTCRs from literature and [Formula: see text]-values that are significantly higher.

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SONG, WOOJIN, KYUBONG JUNG, DOO-MAN CHUN, SUNG-HOON AHN e CAROLINE SUNYONG LEE. "DEPOSITION OF Al2O3 POWDERS USING NANO-PARTICLE DEPOSITION SYSTEM". Surface Review and Letters 17, n.º 02 (abril de 2010): 189–93. http://dx.doi.org/10.1142/s0218625x10013710.

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In this paper, alumina film was deposited using supersonic micronozzle in nano-particle deposition System (NPDS). Powder deposition at room temperature is important in the field of film deposition since high processing temperature can be a serious limitation for the deposition on flexible substrate. Previously, many studies have been reported on particle deposition, such as aerosol deposition method (ADM) or cold spray method. However, these deposition methods cannot be applied to various types of powders. Recently, NPDS using aluminum nozzle was designed to resolve these problems but it cannot deposit precise patterns less than 1 mm. In this study, alumina particles were deposited using Silicon-based micronozzle in NPDS. Three-dimensional silicon micronozzle was fabricated using semiconductor processing method, specifically deep reactive ion etching (DRIE) method. The silicon micronozzle fabricated by Bosch process is advantageous over the conventionally used nozzle, since the hardness of silicon is higher than that of aluminum and the lifetime can be increased. In this study, alumina nano-particles were accelerated to supersonic level at the neck of micronozzle and deposited on the substrate in a low vacuum condition. The film characteristics were evaluated using field-emission scanning electronic microscope (FE-SEM) and alpha step to measure its thickness of the deposited layer. The deposition result showed that alumina powders were successfully deposited using the fabricated micronozzle by means of NPDS.

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Isaza-Ruiz, Marllory, Joseph Henon, Olivier Durand-Panteix, Gregory Etchegoyen, Fabrice Rossignol e Pascal Marchet. "Elaboration of lead-free Na 0.5 Bi 0.5 TiO 3 –BaTiO 3 (NBT-BT) thick films by aerosol deposition method (ADM)". Ceramics International 42, n.º 13 (outubro de 2016): 14635–41. http://dx.doi.org/10.1016/j.ceramint.2016.06.084.

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Donker, Nils, Daniela Schönauer-Kamin e Ralf Moos. "Mixed-Potential Ammonia Sensor Based on a Dense Yttria-Stabilized Zirconia Film Manufactured at Room Temperature by Powder Aerosol Deposition". Sensors 24, n.º 3 (26 de janeiro de 2024): 811. http://dx.doi.org/10.3390/s24030811.

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Powder aerosol deposition (often abbreviated as PAD, PADM, or ADM) is a coating method used to obtain dense ceramic films at room temperature. The suitability of this method to obtain ammonia mixed-potential sensors based on an yttria-stabilized zirconia (YSZ) electrolyte that is manufactured using PAD and a V2O5–WO3–TiO2 (VWT)-covered electrode is investigated in this study. The sensor characteristics are compared with data from sensors with screen-printed YSZ solid electrolytes. The PAD sensors outperform those in terms of sensitivity with 117 mV/decade NH3 compared to 88 mV/decade. A variation in the sensor temperature shows that the NH3 sensitivity strongly depends on the sensor temperature and decreases with higher sensor temperature. Above 560 °C, the characteristic curve shifts from exponential to linear dependency. Variations in the water and the oxygen content in the base gas (usually 10% oxygen, 2% water vapor in nitrogen) reveal a strong dependence of the characteristic curve on the oxygen content. Water vapor concentration variations barely affect the sensor signal.

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Kim, C. S., M. A. Eldridge, L. Garcia e A. Wanner. "Aerosol deposition in the lung with asymmetric airways obstruction: in vivo observation". Journal of Applied Physiology 67, n.º 6 (1 de dezembro de 1989): 2579–85. http://dx.doi.org/10.1152/jappl.1989.67.6.2579.

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Both the total and regional aerosol deposition were measured in six adult sheep before and after an induction of asymmetric airway obstructions, either by local instillation of carbachol solution (CS, 0.1%) distal to the right main bronchus or inhalation challenge of the right lung with carbachol aerosol (CA, 10 breaths). Total lung deposition was determined by monitoring inert monodisperse aerosols [1.0 micron mass median aerodynamic diam (MMAD)] breath-by-breath, at the mouth, by means of a laser aerosol photometer. Cumulative aerosol deposition over the first five breaths as a percent of the initial aerosol concentration (AD5) was used as a deposition index. Regional deposition pattern was determined by scintigraphic images of sulfur-colloid aerosol (1.5 microns MMAD) tagged with 99mTc. Radioactivity counts in the right (R) and left lung (L) were expressed as a percent of the whole lung count. Half-lung AD5 was then determined by multiplying AD5 by fractional radioaerosol depositions in R or L. Pulmonary airflow resistance (RL mean +/- SE), as determined by an esophageal balloon technique, increased by 111 +/- 28 and 250 +/- 96% after CA and CS, respectively (P less than 0.05). AD5 also increased in all the sheep tested by 29 +/- 3 and 52 +/- 8%, respectively, after CA and CS (P less than 0.05). Radioaerosol deposition pattern was even at base line (R/L = 51:49) but shifted toward the unchallenged L after CS (R/L = 40:60). Deposition pattern after CA was variable: a shift toward L in three, no change in one, and a shift toward the R lung in two sheep.(ABSTRACT TRUNCATED AT 250 WORDS)

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Teses / dissertações sobre o assunto "Aerosol deposition (ADM)"

Chrir, Anass. "Dépôt de couches épaisses piézoélectriques par dépôt d’aérosol (ADM) : Maîtrise du procédé, résolution des défis post-recuit, et démonstration d’application en récupération d’énergie". Electronic Thesis or Diss., Limoges, 2024. http://www.theses.fr/2024LIMO0101.

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Cette thèse explore la fabrication de couches épaisses piézoélectriques sans plomb par la méthode de dépôt d’aérosol (ADM) pour des applications de récupération d’énergie vibratoire. Le travail a d'abord porté sur le dépôt de couches épaisses de BaTiO3 (BT), avec une maîtrise des paramètres de dépôt. Des films d’épaisseur supérieure à 100 µm ont été obtenus sur Kovar®, mais sans propriétés ferro/piézoélectriques en raison de l’effet de taille des grains. Des traitements thermiques au-dessus de 800°C ont permis de restaurer ces propriétés, grâce à la croissance des grains induite par le recuit. L'ajout de Li2CO3 (BT-Li) a réduit la température de recuit nécessaire à la restauration des propriétés fonctionnelles à 650°C, tout en les améliorant à 800 et 900°C. Néanmoins, les substrats de Kovar® ont montré une oxydation après recuit pour toutes les conditions de température et d’atmosphère. Ainsi, des substrats en inox (SUS) ont été utilisés avec succès pour les films de BT et BT-Li, conduisant à des améliorations après recuit. À plus de 900°C, l'insertion du lithium dans le réseau de BT a durci le comportement ferroélectrique et dégrader la réponse piézoélectrique des films BT-Li. Des films de NBT-6BT ont également été déposés sur SUS, montrant des propriétés intéressantes après recuit. Un volet novateur a été l’exploration le co-dépôt par ADM des composites céramique-polymère (CCP), permettant d’obtenir des films avec des propriétés ferro/piézoélectriques sans recuit. Ces films ont été déposés sur Kovar®, polyimide et silicium, ouvrant la voie à des applications sur tout type de substrats, y compris ceux sensibles à la température comme les polymères. Enfin, des démonstrateurs de récupération d’énergie ont été fabriqués avec des couches de BT, NBT-6BT et CCP, tous validant la récupération d’énergie, y compris les démonstrateurs CCP non recuits
This thesis explores the fabrication of lead-free piezoelectric thick films using the Aerosol Deposition Method (ADM) for energy harvesting applications. The work initially focused on the deposition of thick BaTiO3 (BT) layers, with a mastering of the deposition parameters. Films over 100 µm thick were successfully deposited onto Kovar® but lacked ferro/piezoelectric properties due to the grain size effect. Heat treatments above 800 °C restored these properties, thanks to annealing-induced grain growth. The addition of Li2CO3 (BT-Li) reduced the annealing temperature required to restore the functional properties to 650°C, while improving them at 800 and 900°C. Nevertheless, Kovar® substrates showed oxidation after annealing for all temperature and atmosphere conditions. Hence, stainless steel (SUS) substrates were used successfully for BT andBT-Li films, leading to improvements after annealing. Above 900°C, lithium insertion into the BT lattice hardened the ferroelectric behavior, and reduced the piezoelectric response. NBT-6BT films were also deposited onto SUS sheets, showing promising properties after annealing. An innovative aspect of this thesis was the exploration of the co-deposition of ceramic-polymer composites (CPC), making it possible to obtain films with ferro/piezoelectric properties without annealing. These films were deposited onto Kovar®, polyimide and silicon, paving the way for applications on all types of substrates, including temperature-sensitive ones such as polymers. Finally, energy recovery demonstrators were fabricated with BT, NBT-6BT and CPC layers, all validating energy harvesting potential, including non-annealed CPC demonstrators

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Trabalhos de conferências sobre o assunto "Aerosol deposition (ADM)"

Seong, Byeong-Geun, Jung-Hoon Song, Young-Min Park, Hong-Youl Bae, Jin-Soo Ahn, Do-Hyeong Kim, Joong-Hwan Jun, Jong-Jin Choi e Dong-Soo Park. "Anode Supported SOFC With GDC Barrier Layer Deposited by Aerosol Deposition Method". In ASME 2010 8th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2010. http://dx.doi.org/10.1115/fuelcell2010-33288.

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In this study, a thin (less than 1 micrometer) interlayer of gadolinia doped ceria (GDC) was applied by aerosol deposition (AD) process between YSZ electrolyte and LSCF-GDC composite cathode. The GDC interlayer was co-fired with the cathode without an additional heat treatment step. Performance of the cells with the GDC layer was evaluated with small button type cells. The results show that the GDC layer was dense enough to successfully prevent the formation of SrZrO3 layer after cathode heat treatments under 1100°C. Electrochemical performance of the cells largely depended on the sintering temperatures. Maximum power densities were 1.0 ± 0.1 W/cm2 at 750°C after sintering at the temperatures between 1000°C and 1060°C. Through SEM and TEM study, solid solution layer at the interface of GDC layer and YSZ layer was found in the specimen after sintering at 1000°C and SrZrO3 layers on both sides of the GDC layer after heat treatment at 1100°C. These layers contributed to the poor performance of the cells sintered at over 1080°C. Therefore, the temperatures for cathode sintering have to be precisely controlled to get the best performance. AD process requires week vacuum and takes only couple minutes to finish deposition. This presentation also shows scaling up the ADM process to 320 mm × 220 mm planar cells for dozens kW stack application at the Research Institute of Industrial Science and Technology (RIST) in Korea. Long term operation tests for the large cells are now on process.

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Bruckner, M., J. Kita, R. Moos, C. Münch, S. Schuurman e V. Poulain. "P1.4 - Dense ceramic NTC thermistor films produced at room temperature by the novel aerosol deposition method (ADM) for temperature sensor applications". In AMA Conferences 2017. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2017. http://dx.doi.org/10.5162/sensor2017/p1.4.

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