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Academic literature on the topic 'Relaxor perovskite'

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Published: 9 March 2023

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Journal articles on the topic "Relaxor perovskite"

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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.

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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.
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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.

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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.
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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.

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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.
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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.

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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.
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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.

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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.

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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.

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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.
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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.

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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.

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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.

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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.
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Dissertations / Theses on the topic "Relaxor perovskite"

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Randall, C. A. "A transmission electron microscopy study of normal and relaxor perovskite ferroelectric materials." Thesis, University of Essex, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376749.

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Kim, Young-Il. "Syntheses, crystal structures, and dielectric property of oxynitride perovskites." Connect to resource, 2005. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1124291783.

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Thesis (Ph. D.)--Ohio State University, 2005.
Title from first page of PDF file. Document formatted into pages; contains xvi, 172 p.; also includes graphics (some col.). Includes bibliographical references (p. 160-172). Available online via OhioLINK's ETD Center
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Waeselmann, Naëmi [Verfasser], and Boriana [Akademischer Betreuer] Mihaylova. "Structural transformations in complex perovskite-type relaxor and relaxor-based ferroelectrics at high pressures and temperatures / Naëmi Waeselmann. Betreuer: Boriana Mihaylova." Hamburg : Staats- und Universitätsbibliothek Hamburg, 2012. http://d-nb.info/1024355527/34.

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Whittle, Thomas Anthony. "A Structural Investigation of Perovskite and Tungsten Bronze Type Ferroic Materials." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14586.

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This thesis set out to investigate lead free ferroic materials with perovskite and tungsten bronze type structures, primarily focussing on the relationship between composition, temperature and crystal structure. A combination of diffraction techniques were employed to investigate the crystal structures. Additionally, other techniques including XANES, SEM, TGA, DSC and ferroic peroperty measurements were also employed to further illuminate these compounds. The first system investigated was the defect perovskite Sr0.8Ti0.6-yZryNb0.4O3, 0.0 ≤ y ≤ 0.6. It was found that neutron powder diffraction data were essential for determining the phase boundary composition. Second order compositional and temperature phase transitions were observed. Increasing the zirconium content increased octahedral tilting and led to higher transition temperatures. Local ordering was determined to be highly probable and it was found that the presence of vacancies extended the range of the high symmetry phase. The second system investigated was the BaxSr3-xTi1-yZryNb4O15, 0.0 ≤ x ≤ 3.0, 0.0 ≤ y ≤ 1.0, tungsten bronze type system. Barium rich compositions were found to adopt a tetragonal structure, while strontium rich compositions adopted an orthorhombic structure. Increasing the zirconium content of samples was seen to make the orthorhombic phase persist further. A large focus was placed on determining the structure of Sr3TiNb4O15 as a model for all orthorhombic compounds. A new structural model was proposed for Sr3TiNb4O15 distinct from those previously published. All orthorhombic compositions were observed to undergo first order phase transitions to the tetragonal structure on heating. The barium and strontium atoms were found to order onto two crystallographically distinct A sites. It was found that the tungsten bronze tolerance factor could be used as a predictive tool for the crystal symmetry of these materials. All compounds in this system for which ferroelectric measurements were performed displayed ferroelectric hysteresis behaviour.
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CONFALONIERI, GIORGIA. "LOCAL DISORDER IN THE STRUCTURE OF BA(TI,CE)O3 PEROVSKITE BY MEANS OF POWDER DIFFRACTION AND TOTAL SCATTERING. EFFECT OF TEMPERATURE, DOPING CONCENTRATION AND GRAIN SIZE." Doctoral thesis, Università degli Studi di Milano, 2017. http://hdl.handle.net/2434/478906.

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Nowadays BaTiO3 is considered as one of the most relevant environmental-friend ferroelectric and, thank to the chemical substitutions at the Ba2+ and/or Ti4+ sites, its properties are usually tailor to meet a big variety of devices and performance requirements. A classical example is the solid solution BaTi1-xMIVxO3, where M could be Sn, Zr, Hf, Ce etc., whose ferroelectric behavior shows an almost continuous variation with composition. The study of these compounds is then essential to improve their characteristics and make their suitable in more applications. Considering that their properties are deeply linked to the structure and especially to structural defects, average and local structural analyses are essential to better understand the origins of different polar behaviours and to have a real control on these materials. Despite this need, only BaTi1-xZrxO3 (BTZ) system, which is one of the most popular dielectrics used in multilayer ceramic capacitors, has been investigated in some detail. Although the similarity to BTZ suggests that BaTi1-xCexO3 (BTC) may be promising as lead free actuator materials, studies on this solid solution are almost limited. Thus in this research the BTC solid solution has been structurally investigated in order to provide knowledge lacks. Different ceramic samples with different doping amounts and different polar behaviours (from normal ferroelecric to relaxor via diffuse phase transition) have been investigated at different temperatures. In addition, taking into account the current tendency in miniaturized devices required in microelectronics, also chemical equivalent nano powders have been considered to explore not only doping effects, but also that of size. Pair Distribution Function (PDF) with different type of approaches (as carbox, biphasic and so on) has been employed coupled with TEM analysis and Raman spectroscopy. A complete description of that BaTi1-xCexO3 materials is given underlining links between polar behaviours, temperature, doping and size effects.
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Nahime, Bacus de Oliveira [UNESP]. "Estabilização da fase perovskita e propriedades estruturais de filmes finos relaxores do sistema PLZT." Universidade Estadual Paulista (UNESP), 2016. http://hdl.handle.net/11449/138275.

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Programa de Capacitação dos Servidores do Instituto Federal de Educação, Ciência e Tecnologia Goiano
Filmes finos de Pb0,91La0,09(Zr0,65Ti0,35)O3 (PLZT) foram preparados sobre substratos Pt/TiO2/SiO2/Si(100), usando um método químico baseado no processo Pechini, com objetivo de estudar a supressão da fase pirocloro e a estabilização da fase perovskita. Pós de PLZT preparados por reação do estado sólido foram utilizados como principal fonte de íons Pb2+, La2+, Zr4+ e Ti4+ pela dissolução em solução ácida. A obtenção de resinas poliméricas estáveis com diferentes excessos de chumbo foi possível preparando-se separadamente as resinas de PLZT e PbO seguido de posterior mistura e homogeneização à temperatura ambiente.
Pb0,91La0,09(Zr0,65Ti0,35)O3 (PLZT) thin films were prepared on Pt/TiO2/SiO2/Si(100) substrates by using a chemical method based on Pechini process to study the pyrochlore phase suppression and to stabilizing the perovskite phase. PLZT powders prepared by solid state reaction were used as source of Pb2+, La2+, Zr4+ and Ti4+ ions by its dissolution in acid solution.
Programa de Capacitação dos Servidores do Instituto Federal de Educação, Ciência e Tecnologia Goiano, aprovado pela Resolução nº 028/2010 de 23/11/2010
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Nahime, Bacus de Oliveira. "Estabilização da fase perovskita e propriedades estruturais de filmes finos relaxores do sistema PLZT /." Ilha Solteira, 2016. http://hdl.handle.net/11449/138275.

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Orientador: Eudes Borges de Araújo
Resumo: Filmes finos de Pb0,91La0,09(Zr0,65Ti0,35)O3 (PLZT) foram preparados sobre substratos Pt/TiO2/SiO2/Si(100), usando um método químico baseado no processo Pechini, com objetivo de estudar a supressão da fase pirocloro e a estabilização da fase perovskita. Pós de PLZT preparados por reação do estado sólido foram utilizados como principal fonte de íons Pb2+, La2+, Zr4+ e Ti4+ pela dissolução em solução ácida. A obtenção de resinas poliméricas estáveis com diferentes excessos de chumbo foi possível preparando-se separadamente as resinas de PLZT e PbO seguido de posterior mistura e homogeneização à temperatura ambiente.
Abstract: Pb0,91La0,09(Zr0,65Ti0,35)O3 (PLZT) thin films were prepared on Pt/TiO2/SiO2/Si(100) substrates by using a chemical method based on Pechini process to study the pyrochlore phase suppression and to stabilizing the perovskite phase. PLZT powders prepared by solid state reaction were used as source of Pb2+, La2+, Zr4+ and Ti4+ ions by its dissolution in acid solution.
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Chu, Fan. "The ferroelectric phase transition in complex perovskite relaxors /." [S.l.] : [s.n.], 1994. http://library.epfl.ch/theses/?nr=1248.

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Malibert, Charlotte. "Ordre et desordre dans la perovskite ferroelectrique relaxeur pbsc 1 / 2nb 1 / 2o 3 comparaison avec quelques perovskites simples et complexes." Paris 6, 1998. http://www.theses.fr/1998PA066703.

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Nous avons synthetise et etudie la structure de composes perovskites ferroelectriques pbsc 1 / 2nb 1 / 2o 3, caracterisees par differents degres d'ordre sc/nb et par une stchiometrie differente sur le site du pb. Ces composes sont appeles relaxeurs : leur constante dielectrique est elevee avec une forte valeur sur une gamme de temperatures importante et presente un phenomene de dispersion en frequence. L'etude de l'ordre des cations sc/nb sur le site b par diffraction des rx et des neutrons est mise en relation avec les proprietes dielectriques : il existe toujours un ordre local a courte portee au sein des composes macroscopiquement desordonnes, de meme que l'ordre reste a moyenne portee dans le psn ordonne. La mise en ordre sur le site b a un effet sur la valeur du maximum de la constante dielectrique, alors que la non-stchiometrie (introduction de lacunes, substitution plomb/baryum) augmente fortement la diffusivite de l'anomalie dielectrique. Dans la phase paraelectrique, nos etudes par diffraction ont montre que les atomes de plomb n'occupent jamais leur position ideale cubique et sont statistiquement desordonnes de facon isotrope a des temperatures bien superieures a la temperature de transition. Nous avons montre le meme type de desordre dans la perovskite simple pbtio 3, desordre qui dans ce cas n'est present que juste au-dessus de la temperature de transition. Ce desordre est caracteristique des atomes de plomb car nous avons montre son absence dans batio 3 et basc 1 / 2nb 1 / 2o 3. La phase ferroelectrique rhomboedrique est semblable pour tous les composes de psn. Les deplacements cooperatifs des cations a et b s'averent etre semblables a ceux du pmn/pt, mais differents de batio 3, ainsi que ceux de la phase tetragonale
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Roukos, Roy. "Transitions de phases dans des oxydes complexes de structure pérovskite : cas du système (1-x)Na0,5Bi0,5TiO3 - xCaTiO3." Thesis, Dijon, 2015. http://www.theses.fr/2015DIJOS020/document.

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Les solutions solides (1-x)Na0,5Bi0,5TiO3 (NBT) – xCaTiO3 (CT) ont été étudiées par diffraction des rayons X, spectroscopie Raman, microscopie électronique à balayage, spectroscopie d’impédance et DSC. Ce sont des matériaux présentant la structure cristalline pérovskite. L’étude révèle la complexité mais aussi la richesse des phénomènes physiques dans cette famille de composés : les séquences des transitions de phases, l’influence du dopant Ca2+ sur les propriétés physico-chimiques du matériau, la relation étroite entre propriétés diélectriques et caractéristiques structurales. Des solutions solides (1-x)NBT – xCT, avec 0 ≤ x ≤ 1,00, ont été synthétisées par voie solide classique puis frittées selon une procédure spécifique dans un milieu confiné pour éviter toute perte de sodium et de bismuth. Les caractéristiques cristallines des solides obtenus imposent clairement de distinguer trois domaines suivant les valeurs de x. En effet, pour les valeurs croissantes de x et à la température ambiante, on observe un premier domaine (Région I, pour x ≤ 0,07) dans lequel le solide obtenu est une solution solide de structure cristalline, de groupe d’espace R3c, identique à celle de NBT pur. Pour les valeurs les plus élevées de x (Région II, pour x ≥ 0,15), le solide obtenu est une solution solide de structure cristalline, de groupe d’espace Pnma, identique à celle de CT pur. Enfin, entre ces deux domaines (Région III, 0,09 ≤ x ≤ 0,13), les solides obtenus sont biphasés, R3c + Pnma, en se limitant aux appellations des groupes d’espacé des phases formées. Dans la région I, lors du chauffage, la séquence des transitions de phases R3c → P4bm → Pm3m est mise en évidence; les températures des transitions se déplacent vers les plus basses températures quand la concentration en Ca2+ augmente. Les solides sont ferroélectriques à l’ambiante puis développent un caractère relaxeur, par coexistence de deux phases, avec l’augmentation de la température. Dans la région II, les solides révèlent un comportement relaxeur dès l’ambiante. Une transition de phase diffuse au sein de la phase orthorhombique Pnma est toutefois mise en évidence ; le solide passe d’un état relaxeur à un état paraélectrique tout en conservant, a priori, la même structure cristalline. Le phénomène de relaxation dans ces composés est expliqué par la formation de micros ou nanorégions polaires. La région III, quant à elle, est caractérisée par l’apparition d’une hystérésis thermique mise en évidence pour la première fois ; elle est expliquée par la relation entre la microstructure cristalline et les propriétés diélectriques. Enfin, l’ensemble de nos résultats a été regroupé dans un diagramme de phase original en composition et en température
The solid solutions (1-x)Na0,5Bi0,5TiO3 (NBT) – xCaTiO3 (CT) were studied by X-ray diffraction, Raman spectroscopy, scanning electron microscopy, impedance spectroscopy and DSC. These materials have a perovskite crystalline structure. This study reveals not only the complexity but also the richness of physical phenomena in these compounds: phases transitions sequences, the Ca2+ effect on the physical-chemistry properties and the relation between dielectric properties and crystalline structure. Thereby, (1-x)NBT – xCT solid solutions (0 ≤ x ≤ 1.00) were synthesized by chemical solid route, then they were sintered by a particular procedure in order to avoid sodium and bismuth volatilization. The solid crystalline characteristics obtained prove clearly the necessity to distinguish three fields as a function of x values. First of all, for increasing x at room temperature, there is a first region so called region I (x ≤ 0.07), wherein the crystalline structure of solid solutions obtained has a space group R3c identical to that of pure NBT. For the highest values of x, (Region II, x ≥ 0.15), the solid obtained has a space group Pnma, identical to that of pure CT. Finally, between these two regions, (0.09 ≤ x ≤ 0.13), the solid solutions obtained are biphasic, R3c + Pnma, limited to appellations of the space groups formed phases. In region I, upon heating, phase transition sequence R3c → R3c + Pnma → Pnma was determined; the corresponding transition temperatures move to low values with increasing Ca2+ concentration. These solids are ferroelectric at room temperature and then develop a relaxor character, by coexistence of two phases, with increasing temperature. In region II, these solids reveal a relaxor behavior at room temperature. However, a diffuse phase transition within the orthorhombic phase Pnma has been identified; the solid changes from relaxor to paraelectric while maintaining the same crystal structure. This phenomenon was explained by the formation of micro or nano-polar regions. Region III, demonstrated for the first time, is characterized by thermal hysteresis, and explained by the relation between crystalline microstructure and dielectric properties. Finally, all our results were assembled in an original phase diagram as a function of concentration of Ca2+ dopant and temperature
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Book chapters on the topic "Relaxor perovskite"

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Alberta, Edward F., Ruyan Guo, and Amar S. Bhalla. "The Morphotropic Phase Boundary in Perovskite Ferroelectric Relaxor Systems." In Ceramic Transactions Series, 55–64. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118380802.ch4.

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Bokov, A. A., and Z. G. Ye. "Morphotropic Phase Boundary and Related Properties in Relaxor-Based Piezoelectric Perovskite Solid Solutions." In Ceramic Transactions Series, 37–53. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118380802.ch3.

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Fan, Hui Qing, Jin Chen, and Xiu Li Chen. "Preparation and Characterization of Relaxor-Based Ferroelectric Thick Films with Single Perovskite Structure." In High-Performance Ceramics V, 24–26. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/0-87849-473-1.24.

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Fan, Hui Qing, and Xiu Li Chen. "Perovskite Relaxor Ferroelectric Thick Films Directly Grown from Oxide Precursors by a Low Temperature Hydrothermal Process." In Advances in Composite Materials and Structures, 1049–52. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-427-8.1049.

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Mamin, R. F. "New Ideas in Relaxor Theory." In Defects and Surface-Induced Effects in Advanced Perovskites, 419–24. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4030-0_43.

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Blinc, Robert. "Order and Disorder in Perovskites and Relaxor Ferroelectrics." In Structure and Bonding, 51–67. Berlin, Heidelberg: Springer Berlin Heidelberg, 2007. http://dx.doi.org/10.1007/430_2006_050.

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Tabata, Hitoshi. "Relaxor Superlattices: Artificial Control of the Ordered–Disordered State of B-Site Ions in Perovskites." In Topics in Applied Physics, 161–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. http://dx.doi.org/10.1007/978-3-540-31479-0_9.

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Bokov, A. A., and Z. G. Ye. "Recent Progress in Relaxor Ferroelectrics with Perovskite Structure." In Progress in Advanced Dielectrics, 105–64. WORLD SCIENTIFIC, 2020. http://dx.doi.org/10.1142/9789811210433_0003.

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Ondrejkovic, P., P. Marton, V. Stepkova, and J. Hlinka. "Fundamental Properties of Ferroelectric Domain Walls from Ginzburg–Landau Models." In Domain Walls, 76–108. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198862499.003.0004.

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This chapter discusses the contemporary possibilities, prospects, and limitations of phase-field simulations and Ginzburg-Landau-Devonshire models of DWs. It focuses on the most studied ferroelectric oxides BaTiO3, KNbO3, PbTiO3, as well as in various complex perovskite oxides like lead zirconate titanate (PZT) and lead-based relaxor ferroelectrics. In the past decade, there have been multiple important results published in the field of perovskite ferroelectrics with a support of phase-field simulations. Certain predictions, like existence of Bloch walls in BaTiO3 or vortex structures in PbTiO3-SrTiO3 superlattices have been verified by atomistic or ab-initio calculations. The chapter resumes their available model potentials and the key predictions reported in the last decade. It is complemented by original data allowing comparisons and an outlook.
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Welberry, T. R. "Lead perovskite relaxors, PZN and PMN." In Diffuse X-ray Scattering and Models of Disorder, 330–65. Oxford University Press, 2022. http://dx.doi.org/10.1093/oso/9780198862482.003.0023.

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This chapter details the progress made in developing a model for the relaxors PZN and PMN that satisfactorily accounts for their distinctive diffuse scattering patterns. A simple first model used sets of harmonic springs to represent effective interactions and was based on the supposition that the Pb ions are displaced away from the centres of their coordination polyhedra. This was able to account qualitatively for the observed diffraction features. The diffraction evidence points to a structure in which the Pb displacements align themselves in thin plate-like domains normal to each of the six <110> directions. More recently an atomistic shell model was developed that used a potential based on density functional theory (DFT) calculations. A similar potential has been used to study BaTiO3 where molecular dynamics simulation allowed dynamical information to be investigated.
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Conference papers on the topic "Relaxor perovskite"

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Gehring, P. M. "Ferroelectric Dynamics in the Perovskite Relaxor PMN." In FUNDAMENTAL PHYSICS OF FERROELECTRICS 2002. AIP, 2002. http://dx.doi.org/10.1063/1.1499556.

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Matsushita, Eiko. "Theoretical aspect on relaxor appearance in mixed perovskite-oxides." In European Conference on the Applications of Polar Dielectrics (ECAPD). IEEE, 2010. http://dx.doi.org/10.1109/isaf.2010.5712235.

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Gehring, P. M. "Soft mode anomalies in the perovskite relaxor Pb(Mg[sub 1/3]Nb[sub 2/3])O[sub 3]." In Fundamental physics of ferroelectrics 2000. AIP, 2000. http://dx.doi.org/10.1063/1.1324469.

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Tillmann, Peter, Klaus Jager, Eugene A. Katz, and Christiane Becker. "Relaxed current-matching constraints by bifacial operation and luminescent coupling in perovskite/silicon tandem solar cells." In 2021 IEEE 48th Photovoltaic Specialists Conference (PVSC). IEEE, 2021. http://dx.doi.org/10.1109/pvsc43889.2021.9518891.

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