Academic literature on the topic 'Ba(Ti,Ce)O3'

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Journal articles on the topic "Ba(Ti,Ce)O3"

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Ang, Chen, Zhi Jing, and Zhi Yu. "Ferroelectric relaxor Ba(Ti,Ce)O3." Journal of Physics: Condensed Matter 14, no. 38 (September 12, 2002): 8901–12. http://dx.doi.org/10.1088/0953-8984/14/38/313.

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Yang, Yang, Zhijian Zhou, Xiaoqin Ke, Yu Wang, Xiaopo Su, Jianting Li, Yang Bai, and Xiaobing Ren. "The electrocaloric effect in intrinsic-acceptor-doped Ba(Ti,Ce)O3-(Ba,Ca)TiO3 ceramics." Scripta Materialia 174 (January 2020): 44–48. http://dx.doi.org/10.1016/j.scriptamat.2019.08.026.

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LU, Da-Yong, and Masayuki TODA. "Dielectric Temperature Characteristics of High-k (Ba, La)(Ti, Ce)O3 Ceramics." Journal of the Ceramic Society of Japan 114, no. 1331 (2006): 612–19. http://dx.doi.org/10.2109/jcersj.114.612.

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Nfissi, Aziz, Yahya Ababou, Mounir Belhajji, Salaheddine Sayouri, and Taj-dine Lamcharfi. "Structural and dielectric properties of sol–gel processed Ce-doped BaTi0.97Y0.03O3 ceramics." Journal of Advanced Dielectrics 11, no. 01 (February 2021): 2150003. http://dx.doi.org/10.1142/s2010135x2150003x.

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Structural and dielectric properties of Ce-doped [Formula: see text][Formula: see text]O3 powders, with the chemical formulation (Ba[Formula: see text][Formula: see text](Ti([Formula: see text]- [Formula: see text]O3 such as [Formula: see text] = 0%, 1%, 3%, 5%, 7% and 9%, produced by the sol–gel method, have been investigated. X-ray diffraction analysis showed that Ce[Formula: see text] ions incorporated Ba sites until [Formula: see text]= 7% indicating that this concentration represents a solubility limit of Ce[Formula: see text] ions in [Formula: see text][Formula: see text]O3 matrix. Scanning electron microscopy (SEM) analysis showed a decrease in grain size down to the same concentration of 7%. Raman spectroscopy analysis showed the appearance of [Formula: see text] mode, which we attributed to the effect of incorporation of Ce[Formula: see text] and Y[Formula: see text] in BaTiO3 matrix. Dielectric measurements revealed that doping with cerium lowers the temperature of permittivity maximum at the ferroelectric-to-paraelectric transition (FPT) of the [Formula: see text][Formula: see text]O3 sample, and reaches a value that should be below [Formula: see text]C for [Formula: see text]= 9%. Moreover, the phenomenon of dielectric resonance was observed on all Ce-doped samples, which was not the case with other dopants as reported in the literature.
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Shin, Dong-Jin, Jinhwan Kim, Soon-Jong Jeong, and Jung-Hyuk Koh. "Piezoelectric and ferroelectric properties in Ba(Zr,Ti)O3 and CuO-Ba(Zr,Ti)O3 ceramics." Materials Research Bulletin 82 (October 2016): 7–10. http://dx.doi.org/10.1016/j.materresbull.2016.03.003.

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Furaleva, K. I., S. G. Prutchenko, A. V. Mitin, and E. D. Politova. "ChemInform Abstract: Ba(Pb,Sn)O3 and Ba(Pb,Ce)O3 Solid Solutions." ChemInform 30, no. 36 (June 13, 2010): no. http://dx.doi.org/10.1002/chin.199936022.

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ZHANG, QIWEI, JIWEI ZHAI, and LING BING KONG. "RELAXOR FERROELECTRIC MATERIALS FOR MICROWAVE TUNABLE APPLICATIONS." Journal of Advanced Dielectrics 02, no. 01 (January 2012): 1230002. http://dx.doi.org/10.1142/s2010135x12300022.

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With strong dependences of dielectric constant on external applied electric fields, relaxor barium zirconium titanate ( BaZr x Ti 1-x O 3 or BZT) and barium stannate titanate ( BaSn x Ti 1-x O 3 or BTS), in both bulk ceramic and thin film forms, are increasingly being recognized as potential candidates of microwave tunable materials for device applications. This paper is aimed to review the recent progress in understanding the dielectric properties (such as tunability, dielectric loss and dielectric constant) of these relaxor materials. However, due to their relatively high dielectric constant and loss tangent, pure Ba(Zr,Ti)O3 and Ba(Sn,Ti)O3 do not fully satisfy the requirements of practical device applications. Therefore, various strategies have been developed to improve the dielectric properties of these two groups of relaxor materials. In this paper, we first discussed the dielectric tunability characteristics of pure Ba(Zr,Ti)O3 and Ba(Sn,Ti)O3 and then summarized the strategies that have been used, including (i) small amount acceptor or donor doping (such as rare-earth ions and transition metal ions) and (ii) forming composites with low loss and low dielectric constant microwave dielectric materials (such as MgO , MgTiO3 and so on). At the same time, the relationship between relaxor behavior and dielectric tunability was also discussed.
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Wang, Chun Huy. "Structure and Electrical Properties of Lead-Free (Bi0.5Na0.5)TiO3-Ba(Sn,Ti)O3 Ceramics." Advanced Materials Research 148-149 (October 2010): 232–35. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.232.

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Extending the investigations on (Bi0.5Na0.5)TiO3-based solid solution for lead-free piezoelectric ceramics, this paper consider the complex solid-solution system (Bi0.5Na0.5)TiO3-Ba(Sn,Ti)O3. X-ray diffraction analysis revealed that, during sintering, all of the Ba(Sn,Ti)O3 diffuses into the lattice of (Bi0.5Na0.5)TiO3 to form a solid solution, in which a rhombohedral phase with a perovskite structure was found. It was found that the samples with a low content of Ba(Sn0.06Ti0.94)O3 exhibit relatively good physical and electric properties. For 0.98(Bi0.5Na0.5)TiO3-0.02Ba(Sn0.06Ti0.94)O3 ceramics, the electromechanical coupling coefficients of the planar mode kp and the thickness mode kt reach 0.16 and 0.57, respectively, at the sintering of 1100oC for 3 h. The ratio of thickness coupling coefficient to planar coupling coefficient is 3.56. For 0.98(Bi0.5Na0.5)TiO3-0.02Ba(Sn0.06Ti0.94)O3 ceramics, the relative density and the thickness coupling coefficient kt reach 98.1% and 0.58, respectively, at the sintering of 1100oC for 5 h. With suitable Ba(SnxTi1-x)O3 concentration and sintering condition, a dense microstructure and good electrical properties were obtained.
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V’yunov, Oleg, Leonid Kovalenko, and Anatolii Belous. "SYNTHESIS AND INVESTIGATION OF BARIUM TITANATE STANNATE SOLID SOLUTION." Ukrainian Chemistry Journal 85, no. 12 (December 16, 2019): 75–83. http://dx.doi.org/10.33609/0041-6045.85.11.2019.75-83.

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Solid solutions of barium titanate-stannate, Ba(Ti,Sn)O3 have been investigated. The sequence of phase transformations during the synthesis by solid state reactions technique has been determined, crystallographic and microscopic examinations of polycrystalline ceramics based on Ba(Ti,Sn)O3 solid solutions have been carried out. The laws governing the change in crystallographic parameters and the average grain size as a function of tin content have been shown. Electrophysical investigations of the obtained ceramics have been carried out. It has been found that the dielectric pa-rameters (e and tgd) of Ba(Ti,Sn)O3-based ceramics can be improved and their sintering temperature can be reduced by the addition of 0.5 wt.% manganese oxide(IV) and 2 wt. % of low-melting glass-forming admixture AST (Al2O3–SiO2–TiO2). It has been shown that the obtained materials have promise in creating ceramic capacitors based on them.
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Bendersky, L. A., R. Maier, J. L. Cohn, and J. J. Neumeier. "Structural Studies of Pulsed-laser-deposited Ba4Fe4Ti3O16 Oxide Films." Journal of Materials Research 15, no. 6 (June 2000): 1389–96. http://dx.doi.org/10.1557/jmr.2000.0201.

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For this paper the pulsed laser deposition on single-crystal MgO substrates of Ba4Fe4Ti3O16 target was studied by transmission electron microscopy and x-ray diffraction. The initial stage of the deposition resulted in the formation of the perovskite Ba(Fe, Ti)O3 phase in an epitaxial, cube-on-cube orientation relationship with a substrate. Further growth of the pseudo-cubic phase was interrupted by the formation of oriented grains with a disordered structure. This disordered structure had a mixture of lamellae of the cubic and hexagonal Ba(Fe, Ti)O3 phases. No formation of the Ba4Fe4Ti3O16 (E) phase was observed. Formation of the disordered phase was explained by the higher stability of hexagonal Ba(Fe, Ti)O3 where accommodation of Fe3+ occurred on a twinning plane. The development of the V-shape morphology and a limited number of orientations of the D structure were explained by the faceting and columnar morphology of the perovskite phase.
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Dissertations / Theses on the topic "Ba(Ti,Ce)O3"

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Amoroso, Danila. "Étude ab-initio de solutions solides piézoélectriques (Ba,Ca)TiO3-Ba(Ti,Zr)O3." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0163/document.

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Les piézoélectriques à haute performance sont des composants clés pour les dispositifs agiles. Il a été démontré récemment que les solutions solides (Ba,Ca)(Ti,Zr)O3 (BCTZ) présentent des propriétés électromécaniques prometteuses. Cependant, les mécanismes microscopiques conduisant à de telles caractéristiques restent à éclaircir, et les investigations théoriques de BCTZ demeurent très limitées à ce jour. En conséquence, cette thèse propose d’étudier les propriétés de différentes compositions de solutions solides (Ba,Ca)TiO3-Ba(Ti,Zr)O3 au moyen de calculs de premiers principes, en mettant l’accent sur la dynamiquedu réseau et sur la compétition entre différentes phases ferroélectriques. Nous nous intéressons d’abord aux quatre composés parents BaTiO3, CaTiO3, BaZrO3 et CaZrO3, afin de comparer leurs propriétés et leurs différentes tendances à la ferroélectricité. Ensuite, le coeur de notre étude est une caractérisation systématique des systèmes binaires (Ba,Ca)TiO3 et Ba(Ti,Zr)O3 en utilisant à la fois l’approximation du cristal virtuel (VCA) et des calculs directs sur supercellules.Lorsqu’on passe continument de BaTiO3 à CaTiO3 dans (Ba,Ca)TiO3, la caractéristique principale est une transformation progressive de la ferroélectricité de type B en type A en raison d’effets stériques, lesquels déterminent en grande partie le comportement du système. En particulier, pour les petites concentrations en calcium, nous avons mis en évidence que laferroélectricité guidée par le site B est globalement affaiblie, conduisant à la disparition de la barrière d’énergie entre différents états polaires et à une polarisation quasi-isotrope. Une amélioration considérable de la réponse piézoélectrique résulte de ces caractéristiques. En passant de BaTiO3 à BaZrO3 dans Ba(Ti,Zr)O3, en revanche, le comportement est dominé parles mouvements coopératifs Zr-Ti et l’électrostatique locale. En particulier, la phase R3m est stabilisée significativement pour les faibles concentrations en zirconium. Sous l’effet d’une augmentation de la concentration en zirconium, le système montre une tendance à la réduction de la distorsion polaire; néanmoins, la ferroélectricité peut être préservée localement dans les régionsriches en titane. Grâce à un modèle électrostatique basé sur un super-réseau BaZrO3/mBaTiO3, nous avons également découvert une activation polaire inattendue pour Zr, en fonction d’un ordre atomique spécifique. Un facteur microscopique expliquant la réponse piézoélectrique exaltée dans BCTZ, pour de faibles concentrations en Ca et Zr, peut donc résider dans l’interaction entre la ferroélectricité affaiblie induite par Ti et la ferroélectricité émergente induite par Ca, interaction produisant une anisotropie minimale pour la polarisation. En outre, notre étude comparative révèle que la physique microscopique spécifique de ces solutions solides limite sévèrement l’applicabilité de l’approximation du cristal virtuel (VCA) à ces systèmes
High-performance piezoelectrics are key components of various smart devicesand, recently, it has been discovered that (Ba,Ca)(Ti,Zr)O3 (BCTZ) solid solutions show appealingelectromechanical properties. Nevertheless, the microscopic mechanisms leading to suchfeatures are still unclear and theoretical investigations of BCTZ remain very limited. Accordingly,this thesis analyzes the properties of various compositions of (Ba,Ca)TiO3-Ba(Ti,Zr)O3solid solutions by means of first-principles calculations, with a focus on the lattice dynamicsand the competition between different ferroelectric phases. We first analyze the four parentcompounds BaTiO3, CaTiO3, BaZrO3 and CaZrO3 in order to compare their properties andtheir different tendency towards ferroelectricity. Then, the core of our study is a systematiccharacterization of the binary systems (Ba,Ca)TiO3 and Ba(Ti,Zr)O3 within both the virtualcrystal approximation (VCA) and direct supercell calculations. When going from BaTiO3 toCaTiO3 in (Ba,Ca)TiO3, the main feature is a gradual transformation from B-type to A-typeferroelectricity due to steric effects that largely determine the behavior of the system. In particular,for low Ca-concentration we found out an overall weakened B-driven ferroelectricitythat produces the vanishing of the energy barrier between different polar states and resultsin a quasi-isotropic polarization. A sizable enhancement of the piezoelectric response resultsfrom these features. When going from BaTiO3 to BaZrO3 in Ba(Ti,Zr)O3, in contrast, thebehavior is dominated by cooperative Zr-Ti motions and the local electrostatics. In particular,low Zr-concentration produces the further stabilization of the R3m-phase. Then, the systemshows the tendency to globally reduce the polar distortion with increasing Zr-concentration.Nevertheless, ferroelectricity can be locally preserved in Ti-rich regions. We also found out anunexpected polar activation of Zr as a function of specific atomic ordering explained via a basicelectrostatic model based on BaZrO3/mBaTiO3 superlattice. A microscopic factor behind theenhanced piezoelectric response in BCTZ, at low concentration of Ca and Zr, can thus be theinterplay between weakened Ti-driven and emerging Ca-driven ferroelectricity, which producesminimal anisotropy for the polarization. In addition, our comparative study reveals that thespecific microscopic physics of these solid solutions sets severe limits to the applicability of thevirtual crystal approximation (VCA) for these systems
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Kuvatov, Azamat. "Polungs- und Biegeverhalten von Ba(Ti, Sn)O3-Keramiken mit einem Funktionsgradienten." [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=975671650.

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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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Bijalwan, Vijay. "Studie syntéz a přípravy bezolovnaté keramiky (Ba,Ca)(Ti,Zr)O3 v závislosti na struktuře a výsledných vlastností." Doctoral thesis, Vysoké učení technické v Brně. CEITEC VUT, 2018. http://www.nusl.cz/ntk/nusl-390293.

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V poslední době je snahou nahradit klasickou komerční olovnatou piezoelektrickou keramiku bezolovnatou, z důvodu zvýšeného zájmu o ochranu životního prostředí a zdraví. Různé typy materiálů již byly navrženy, jako například (K, Na) NbO3 (KNN), (Bi, Na) TiO3 (BNT), (Bi, Na) TiO3 – BaTiO3 (BNT-BT), ale jejich piezoelektrické vlastnosti zatím nedosáhly takových hodnot jako u olovnatý chkeramik (např. olovnatý titanát olova ((Pb Zr)TiO3). Nejvíce se olovnatým materiálů blíží bezolovnatý systém na bázi (1-x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 nebo (Ba, Ca) (Zr, Ti) O3 ((1-x)BZT-xBCT, BCZT) a to díky vysokým piezoelektrickým a dielektrickým parametrům. Nevýhodou tohoto prostředku je jeho velmi vysoká teplota slinování (1520 ° C) za účelem dosažení vysokých piezoelektrických vlastností (např. Piezoelektrické konstanty d33 > 600 pC / N). Tato práce se zabývá bezolovnatou keramikou na bázi BCZT, její výrobou a vylepšením piezoelektrických vlastností dopováním CeO2. Přidáním CeO2 (y wt.%) do (Ba0.85Ca0.15) (Zr0.1Ti0.9) O3 se výrazně snížila slinovací teplota a došlo ke zhutnění při 1350°C. U této kompozice se Curieova teplota pohybovala kolem TC~105°C a velikost zrn byla v rozmezí ~ 10-13 m. Fázový přechod z romboedrické struktury na tetragonální (R-T) byl zjištěn pomocí rentgenové spektroskopie u y = 0 - 0.1 wt.%, což koreluje s výsledky Ramanovy spektrální analýzy. Mikrostrukturní a strukturní charakteristiky byly detailně studovány v korelaci s dielektrickými, feroelektrickými a piezoelektrickými vlastnostmi. Nejlepší funkční vlastnosti byly dosaženy pro keramiku BCZT – 0.07 wt.% CeO2. Tato keramika vykazovala piezoelektrický nábojový koeficient d33 = 507±20pC/N, elektromechanický planární koeficient kp = 51.8 %, dielektrickou konstantu r = 4091±100, ztrátový činitel tan = 0.02, remanentní polarizaci Pr = 13.58C/cm2, intenzitu koercitivního pole EC = 2.13kV/cm při normovaném napětí, d33* nebo Smax/Emax = 840pm/V. Dvoustupňovou kalcinační technikou bylo docíleno homogenního růstu zrn s vysokou relativní hustotou (~ 99% teoretické hustoty). Tato kompozice BCZT- CeO2 vykazovala stálé feroelektrické, dielektrické a piezoelektrické vlastností i při velikosti zrn 10 µm. Bezolovnatá piezoelektrická keramika (Ba0.85Ca0.15-y Cey) (Zr0.1Ti0.9) O3 (BCCeZT) byla dále dopována CeO2 s cílem substituce Ce4+ v místě A krystalické mřížky. Posunutí rentgenových vrcholů k vyšším úhlům naznačuje kontrakce mřížky, což by mohlo způsobit obsazení iontů ceru v místech A této soustavy. Bylo zjištěno, že velikost zrn kolem 10 - 12 m je významná pro vysokou piezoaktivitu bezolovnaté BCCeZT keramiky. Nejvyšší piezoelektrické vlastnosti tato keramika vykazovala při y;Ce = 0.00135 a slinovaná na teplotě 1350°C/4h, kdy piezoelektrické parametry byly d33 = 501±10 pC/N, kp = 38.5±1.92 %, Pr = 12.19 C/cm2, TC = 108.1 °C a s maximální deformací S do 0.14 %. Pro další studium substituce v místě A, byly vyrobeny keramické materiály (Ba1-x-y Cax Cey) (Zr0.1 Ti0.9) O3 (x:Ca = 0.05, 0.10, 0.15, 0.20 a y;Ce = 0.00135). Opět se ukázalo, že pokud byla velikost zrn ~13um, tak keramika vykazovala vysoké piezoelektrické vlastnosti (d33 = 457pC/N) pro x = 0.15 % kalcinované na teplotě 1425 °C. Když se se velikost zrn zvýšila nad 16 um, piezoelektrický nábojový koeficient d33 klesl na 200 pC/N. Rentgenová analýza ukázala změnu fázové struktury z rombické na tetragonální při zvýšení obsahu vápníku.
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Медведев, Д. А. "Высокотемпературные протонные электролиты на основе Ba(Ce,Zr)O3 со структурой перовскита: стратегии синтеза, оптимизация свойств и особенности применения : диссертация на соискание ученой степени доктора химических наук : 02.00.05." Thesis, б. и, 2019. http://hdl.handle.net/10995/76290.

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Медведев, Д. А. "Высокотемпературные протонные электролиты на основе Ba(Ce,Zr)O3 со структурой перовскита: стратегии синтеза, оптимизация свойств и особенности применения : автореферат диссертации на соискание ученой степени доктора химических наук : 02.00.05." Thesis, б. и, 2019. http://hdl.handle.net/10995/76279.

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Hayn, Silke [Verfasser], Karsten [Akademischer Betreuer] Albe, Jürgen [Akademischer Betreuer] Rödel, Hans-Joachim [Akademischer Betreuer] Kleebe, and Gerd [Akademischer Betreuer] Buntkowsky. "First-principles calculations on the structural and thermodynamic stability of (Na1/2Bi1/2,Ba)TiO3 and Pb(Zr,Ti)O3 / Silke Hayn. Betreuer: Karsten Albe ; Jürgen Rödel ; Hans-Joachim Kleebe ; Gerd Buntkowsky." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2013. http://d-nb.info/1108093310/34.

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Ho, CHI PANG, and 何志鵬. "Synthesis and Characterization of Hexagonal (Ba,Sr)(Ti,Ga)O3." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/59041800190273672028.

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碩士
中國文化大學
材料科學與奈米科技研究所
98
The (Ba,Sr)(Ti,Ga)O3 samples are synthesized by the solid state method in air and the parent components BaTi1-xGaxO3 (ABO3) are substituted Ba for Sr (x=0.1, 0.2 and Sr: 1%~9%) in this work. The structure of samples are changed from hexagonal to mixed phases then tetragonal through the A-site substituting process, which is consistent with the thermodynamic prediction on literature. The all samples can form the pure hexagonal structure when the Sr-concentration is lower than 2%, and the mixed phase region is decreasing with Sr-doping level increasing. In the higher Sr-doping region, the structures of samples are tetragonal only. The hexagonal structure of (Ba,Sr)(Ti,Ga)O3 samples are increasing with the sintering temperature increasing in the lower Sr-doping region, but the tetragonal structure is dominant in the higher Sr-doping region. This is consistent with the result of room temperature Raman spectrum measurements. Because the Raman spectrum is reported that the tetragonal modes of BaTiO3 will go away and the intensity of hexagonal modes of BaTiO3 systems are increasing with sintering temperature increasing. During the substituting proceeding, because the ion-radius of Sr2+ is smaller than Ba2+, the volume of unit cell of (Ba,Sr)(Ti,Ga)O3 samples are decreasing with the Sr-concentration increasing. Although the atomic weight of Sr is lighter than Ba, but the density of samples aren’t also decreasing with Sr-doping level increasing, because the hexagonal phase is a metastable structure on thermodynamic, which is due to tetragonal phase replacing hexagonal phase in higher doping region at room temperature. The microwave property measurement are showed that because the main phase of samples will change from hexagonal to tetragonal with the Sr-doping level increasing, which is due to the Qxf value and K value of samples are dramatic dropping with Sr-concentration increasing. It means that if the samples are included the tetragonal structure, whose Qxf value and K value are hugely decreasing, so it also proofs that the hexagonal BaTiO3 material has very good microwave property and a large potential for application.
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Wen-An, Lan. "A Study of Ferroelectric Ba(Zr,Ti)O3 Thin Film Varactors." 2006. http://www.cetd.com.tw/ec/thesisdetail.aspx?etdun=U0016-1303200709284817.

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Lan, Wen-An, and 藍文安. "A Study of Ferroelectric Ba(Zr,Ti)O3 Thin Film Varactors." Thesis, 2006. http://ndltd.ncl.edu.tw/handle/54262041506247480797.

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博士
國立清華大學
材料科學工程學系
94
The dielectric constant of ferroelectric material, Ba(Zr,Ti)O3, (BZT) changes with external dc biasing voltage. Based on this tunable characteristic, it is useful to fabricate the varactors, tunable filters and phase shifter devices. In this research, two kinds of ferroelectric varactors were investigated, i.e. structures made with parallel and coplanar electrodes, and the study includes three topics: (1) the influences of bottom electrodes in parallel structure, (2) the influences of interfacial layer in the ferroelectric varactors fabricated on high-resistivity silicon (HR-Si), (3) the influences of high-k and low loss buffered layer and annealing condition in the ferroelectric varactors fabricated on high-resistivity silicon. In the first topic, three kinds of bottom electrode with different thickness were studied; including Pt, LaNiO3/Pt and LaNiO3/Au/Pt. Increasing the Pt thickness reduces effectively the total loss and raises the figure-of-merit (FOM) value. The conductive oxide, LaNiO3 (LNO) layer, enhances the textured crystallinity and increases the breakdown voltage, resulting in higher tunability of capacitance and FOM value. In the second topic, the BZT films deposited on HR-Si with or without tetraethylorthosilane (TEOS) SiO2 as buffer layer were studied. The influences of electrical characteristics were measured by impedance and network analyzer at high and microwave frequencies, respectively. The results at high frequency show that the tunability of coplanar varactors results from the depletion and accumulation of carriers in Si, which can be modeled by two back-to-back MOS capacitors in series connection. At microwave frequencies, positive tunability, i.e. [C(V)-C(0)]/C(0) > 0, was observed and can be explained by an equivalent circuit in relation to the formation of positively-charged defects at the interfacial layer and the modulation of carrier accumulation at the interface in Si. In the third topic, the Ta2O5 and (Ta2O5)1-x(TiO2)x layers were used to investigate the influences of high-k and low loss buffer layer. The results show that the thicker buffer layer and lower dielectric constant result in lower tunability. Moreover, the reduction of Ta5+ and formation of oxygen vacancies induce the change of carrier distribution at interface in Si, giving rise to different tunability at microwave frequencies. The positively-charged defects in the interfacial layer attract the electrons accumulated on the surface of silicon which screen the microwave from penetrating into the HR-Si, and affect the capacitive effect of HR-Si in series connection to the varactor. In addition, annealing in O2 annihilates the oxygen vacancies and oxidize the cations of BZT films causing the reduction of carrier accumulation and tunability. Annealing in N2 increases the oxygen vacancies and the reduction of cations in BZT films causing the raise of charged defects and injected carriers giving rise to hystersis behavior.
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Books on the topic "Ba(Ti,Ce)O3"

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Zhongguo gan bu xuan ba de wen ti yu dui ce yan jiu. Beijing: Zhongguo she hui ke xue chu ban she, 2009.

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Xing fa ti xi yu xing shi zheng ce: Chu Weizhi jiao shou ba shi hua dan he sui ji = DOGMATICS OF CRIMINAL LAW AND CRIMINAL POLICY. Beijing Shi: Beijing da xue chu ban she, 2013.

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Book chapters on the topic "Ba(Ti,Ce)O3"

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Maiwa, Hiroshi. "Preparation and Properties of BaTiO3 and Ba(Zr,Ti)O3 Ceramics by Spark Plasma Sintering." In Advances in Ceramics - Electric and Magnetic Ceramics, Bioceramics, Ceramics and Environment. InTech, 2011. http://dx.doi.org/10.5772/17092.

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Belous, Anatolii G., Oleg I. V'yunov, Oleg Z. Yanchevskii, Leonid L. Kovalenko, Tetiana O. Plutenko, and Yuriy D. Stupin. "Materials with high dielectric permeability on the basis of spontaneously polarized systems, lithium conductors and transition metal oxides." In NEW FUNCTIONAL SUBSTANCES AND MATERIALS FOR CHEMICAL ENGINEERING, 67–78. PH “Akademperiodyka”, 2021. http://dx.doi.org/10.15407/akademperiodyka.444.067.

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Materials with a high dielectric constant (e > 1000) based on complex oxides of spontaneously polarized systems, lithium-conducting systems, and oxides of transition metals were studied. It was shown in dielectric ceramics Ba(Ti,Sn)O3 the absence of significant dispersion of dielectric parameters (e and tg δ) in a wide frequency range from 1 to 105 Hz. The introduction of MnO2 and Al2O3-SiO2-TiO2 improves dielectric parameters and reduces sintering temperature. Obtained ceramic materials are characterized by high dielectric constant values e ~ 13000–16000 and low dielectric losses tg d ~ 0.05–0.06 (at 1 MHz). Synthesized solid solutions of La0.5Li0.5-xNaxTiO3 system, where x = 0 and 0.1, have high values e¢ > 104 at low frequencies (f ≤ 10 Hz). Dielectric properties of these materials are determined by the lithium ions mobility that increases with the rise of sodium content by increasing bottleneck size and decreases by the number of lithium vacancies reduction. The disadvantage of such materials is the decrease in dielectric constant with frequency increase. It was found that the ceramic СaСu3Тi4–xAlxО12-y-0.5xFy with x/y = 0.04/0.04 after sintering for 10 h is characterized by dielectric parameters: e¢ » 71000 (1 kHz) and tg d » 0.047. Introduction of aluminum (x/y = 0.04/0) or fluorine (0/0.08) in CCTO reduces dielectric losses (tg d » 0.044). The advantages of this type of material are a wide frequency range of high dielectric constant and relatively low dielectric loss. Synthesized materials can be used for the development of ceramic capacitors with high characteristics.
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"a (o m ft oeunnti ) n an cdom th p e arison to som inten duration of tehenodrrmyaplero io r d. avTeh ra ugse , b cu y l ti a v lt aetr io in ngprtahcet ic cerso . p, genotype, planting date, and m th u es sesid ty ef iann it d io ndsu . raM ti eotneoarroelotghieca key characteristics of Agriculture is usually the first economic sector to phe t be considered as region spe lcid fi rcosuignh ce ttdheefiantim tio onss ­ abreeao ff f e te c n te dqub ic ykd ly roduegph le ttbeedc , aeusspeec so ia illlymiofis th tu erepesruipopdl ie osftsaotm io ric cendaoerfen diti ini c ti l o im on astethraetgriemseu lt dienpe deficiencies of precipi­ moisture deficiency is associated with high tempera­ on the ns differentiate me n te doernotl . ogFiocraledxraomupglhet , tduurreisngan th dewgirnodwyincgon se d a it sioonnsi . s T cr h it e ic a ti l m in in tgheofdertaeirnm fa i l ­ llm es asgn th abna si ssom of e th sepencu if m ie bderthorfesdhao ys l with precipitation nation of impacts. Crop or forage yields may be nor­ (e.g., itude of the deficiency over so dmreap th e e ri rod th o an f ti t m he etm im al eloyr ( i a .e b . o , vceo in ncoirdm in aglwdiu th ri n cr g i ti acadlrpohueg no hltog if icraalinsfta ag ll esi ) saOsrm ga unc fo h r Britain, fifteen days, none of which received and effective (i.e., low intensity and high soil infil­ in thos iz aeats0. rieogni215 on 93m6m ]) . oSfupcrh ec a ip idteaftiinoint io [B n ri is ti suhnrReaailn is ftailcl trat H io yndrroaltoeg ). ical droughts are associated with the effects c se oam so mno al n . an M d os etxst where precipitation distributi m en e d te eodropleorg io ic daslw dr i o th uoguhttrd ai enff in al oln is of periods of precipitation shortfall on surface or sub­ relate actual precipitation depa itio a n re slsaukre fa cleevw els a , tegr ro su upnpdlwya ( tie .e r) ., rsa tr th ea emrftlhoawn , rweistehrvpor ir eca ip nid ­ a ti mmoeun sc tasleosn . H monthly, seasonal, wa rtteurreyse ar t , ooraavnen ra ugaeltHay ti dornolsohgo ic rt aflald ls r o ( uDgrhatcsuapreetusaul. al1 ly 98o0u , t K of le pmheaSse1o9r8l7a ) g . are Aegqruiaclu ly lt uvraarliuam ble a . n perceptions of these conditions tdhreo ug o h cc ts u . rrM en e c te eoroof lo g m ic e a te lod ro ro lo uggihctasl re asnudltfargorm ic u p lt ruerca i­ l m on etperoercoilpoigtiacta io lddrroouugghhttto li n a ks various characteristics of pitation deficiencies; agricultural droughts are largely and potential nesvhaopro ta tr gaenss , gdriifcfuelrteun ra cles im bpea tw cts, focusing the result of soil moisture deficiencies. More time deficits, and piration (ET), seoeinlawca tu te arlien la o ps th es erbceo fo mrpeopnreenctispio ta fttihoenhdyedfr ic oileongciiceasla sy re s te d m et e (e c . tge . d , cdheapreancd te ern is tto ic nsop re fvoa rt i h li . ngAw plant’s demand for water is reservoirs, groundwater). As a result, impacts are out growth, and s t he ofphtyhse ic al sp eeactih fi ecrcpolnadnitt , i ons, biological of phase with those in other economic sectors. Also, the soil. and biological p it rsopsetratg ie esooffw riv a e te rs r ) i n is hoyfd te ro nlougsiecdalfo st rom ra ugletispy le st eam nd s ( ceo .g m ., preets in er gvopiu rs r­ , dorfocu ro gphst sh Aonu ld opaecrcaotu ional definition of agricultural poses (e.g., power generation, flood control, irri­ example, adted fi icfifeen re tnstub st natge fo srotfhe cr voap riable susceptibility gation, recreation), further complicating the sequence stage wil soil moisture idneavneleoaprm ly egnrt. o w Fo th r a in n d th q es ueansttiofriacgae ti osnyso te f m im sepsaccatlsa . te Csodm ur pientg it idornoufg or htw , aatnedrrseoq il u ir m em oi lsthuarveeliist tle su impact on final crop yield if top-conflicts between water users increase significantly. moisture en ctosn . ti Hnouw es e , v ffi ear ci , einft th teodm ef e ic eiten early growth The frequency and severity of hydrological drought result. substantial yie c ld y o lo fsss ub m so aiyli ( s19o6f6 te ) n de dfeifniendedaadtrotuhgehtr iv yeerarbaassionnescian le . whW ic hhiptphlee the The impacts of drought are crop specific because a ru gngo re ff g . atLeow ru -n fl oofwfifsre less than the long-term average betw m ee onstcrw op ea s. thPelra -s netn in s g it idvaetepshaenndolm og aitcuarla ti s o ta ngepserv io a d ry stfiomremapney ri osd tr efaam lls s . bIefqu th eenca ie cstuhaalvfelobweefnordea te srem le icnteeddahlisgohv te a m ry p between crops and locations. A period of hydrological drought lioswc on a si cdeerrtead in tothbreesihnop ld ro , gr th es esn . d se rnysic ti ovnedi era g ti roonts ur wt hmeasy tr ecsositnhca id teocw cu it rhsiancarsis ti occailatw io enatw stage for one he it r h -b Hio li w ty e v th ear, ttm he usntubmebeexrco ee fddeadystoanddeftihneelaevheyldorfop lo rgoibcaa ­ l c ca ri n ti coafltesn ta rgeedu fo crea th neotrh is ekro cr fodpr . o A cr gorp ic while missing a drought period is somewhat arbitrary. These criteria ught ium lt pua ra cltpolnancn ro in pgs will Tvhaeryibm et p w ac etesnso tr f e am hy sda ro nldog ri ivcearl ba dsr in osu . ght in an." In Droughts, 41. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-29.

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"T cu im rre e n tl Sycahleeasd ) qu aas rte wreeldlaatst he thLeammounltt -i D na oth io e n rt aylEIaR rt I h , odtrhoeurgm ht ajporrem di ocd ti eolnprw ob il llem re s q . u T ir hee the resolution of hOabvseearnva im to p ry o rt oafntCcooluupm le bdiamoUdneilvecrosm ity p . onTehnet, sea lt ehfo fo urgthsp ex hteernes , io onntaogfloorbeaclasdto in mga , in boatnhdth th eseeaorcee dva saonlnacn es diantcm lu odse ­ m in acn lu ydeodf ( t C he a rs toyn pe 1s9o 98 f ) m . ethods discussed above are uomciesamnatacnhdbaettmwoesepnhtehree . fl Fuo xe rsmaatntyhearbeoaus, n d th atr io ie nsoofftthhee rep F li o ca rtE in NgSaOn , d c , ur in re nstom co eupclaesdesm , oidmep ls roav re in cgapoanb le thoefo of frtehaelsie st iwcillalnrde -q suuirrfeacse ig coupling may be ess eenatd ia dli . tiA on ll tshue cc ecsusrroefnetmgpein ri ecraalt / isotn at i o st ficcaolumpe le th dom ds o . dFeo ls rirnesptlain ca ctee , a model parameterisatio nificant improvements in the SST anomaly patterns in the equatorial Pacific that th ry elraeyqeu rs ir , ecd lo m ud osd , erlad im inasp ti oonf , saun rf dacceonpv ro ecce ti sosn es, bound­ have many characteristics in common with observed to a quick solution, but, ro g v iv eemnetnhtesiam re p o li rktealny . N to onye ie o ld flEeN ss SsO uc cceosm sf puolsiin te tsh . eCm ur orreentdim ffi ocduelltspa ro re blceomnso id ferreapblliy ­ imp Iatcsthoofud ld ronuogthbte , they are worth pursuing. ce of the p ca hteirnigcc th ir ecuslpae ti c o if n ic peav tt oelruntsioinnoafgtihve en SESNTSaOndepaitsm od oes . ­ tehxe prospects for im forgotten, however, that not all of However, it is precisely this problem that must be no ctlufsuilv ly eluynodnersse ta a n so pnraolvteidmde ro sc uag le hst . p A re l dictions reside solved. Just as the ‘average’ daily weather is rarely of climate variabilit d y , th th eem re u l is ti aanmnpulaelteo th doeucgahdawles ca dloeo ce bpsteuravleda , idthteo ‘ ucnadneornsitcaanl’ diEnNgS th Oan id aeauissefm ul orceonastcroun ct ­ e2x .1 is c t ) e nc aend -e th .g e . , sien the time series o vidence for its for prediction. To reach their full potential, coupled distributions of rai cnuflaalrl ( cFhiagnugrees2i . n2ftrhae in f p al rlob (F ab ig il uir ty eim nd oidveildsun al eepdas to t E be N S ab O le etpoisroedpe li scaa te ndt he th eeivroleuv ti ooln vi nogfnoefw co duep velopments in data an ). Very recently, extratropical atmospheric and ocean interactions. There is lesdommeoedveildsehnacveeosftd ar etaeld ys t is oaonpdeinn the accuracy The most optimistic expectation is that once that may have a somewhat c ad d a if lfv er aern ia t t io unpstihnisEN fie S ld O . cEoNuSpO le , d th m ey odw el i s ll bheavaeb le cotnoqhueelrped id etnhtei fy chaanld le npg re edio ct ftmheeasiun red by the ocean s character, as other modes of climate variability. This may include Zhang te ertananl. ua1l99 ti 7 m , eFoslc la al neusr fa ( cKeleteemmapne ra et tures, from links between ENSO and the climate system not yet are now beginning to fin ddeatanlu . m1b9e9r8 ) o . M al. od1e9 ll 9e6 rs , m dis ocdoevlesremdaiyntahiediimnpienrv fe ecsttiogbaste io rv nast io onfaplodsastiab . lIemcplriomvaetdem ab e il cih ty anoin sm th seinde th ca edN al otrothmaun lt d i tropic f potential modes that link ocean basins, such as ENSO-and Barnett 1996). There is adlescoad ev aalltiPm ac eifsiccaf le o r ( vari­ related variations of SST in the tropical North Atlantic, ENSO links to rainfall may come an id dengcoed th ep aetnsLoam ti e f rece In n tl aydddiistc io u n ss etdoboycE ea n n fi -e altdmaonsdphMea re y er c o ( u1p9l9 in 7 g ). , new nointutdheeo se fcE ul N ar S O va riitas bility in the str ding generations of models need to include realistic land-southern Europe (R eolpfe -le wes .g k . i , a in ndneonrg Ha th th lp e e rn an dAfm ri acga/ ­ rae tm ali oss ti pchm er oedeclosuopflitnhge . la Snudch su rifm ac peroavnedmie ts ntvsegientvao ti lovneaThheeadp , r m ed aiyctaalbsio lity of ENS rt 1987). and adequate descriptions based on observed data of in Northern Hevm ar iyspohnerdeecOa sp d , rail on ntgiem ( e to s Ba c a ls a a le fse , w e sp se eacs ia oln ly strheep re isne it nitaal tio ve nge in ta t m io ondesltsa te is . c W ur orrekn tl oynbleainndg -s m ur afiancleym 19 e9a5n ) s . (i I . n e ., additio meda et al. driven by the development of coupled models for over several cdheacnagdenes , sis ) n ec a th u lso e la r ‘ itvnyfpairciaalbio li rty in the climate climate change projection over the next century conditional ENSO probability l u fo ernecceassetsxsi . m pe Fpcolteeds ’ e values (Dickinson et al. 1996). the Gulf Coast of the United States shows reaxaam sonal Significant advances in coupled model-based ENSO signal for both the first and second half s o tro p n le, f th g e." In Droughts, 65. Routledge, 2016. http://dx.doi.org/10.4324/9781315830896-45.

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Conference papers on the topic "Ba(Ti,Ce)O3"

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Suchaneck, G., and G. Gerlach. "Requirements to (Ba,Ca)(Zr,Ti)O3 electrocaloric materials." In 2013 Joint IEEE Int'l Symp on Applications of Ferroelectrics & Workshop on Piezoresponse Force Microscopy (ISAF/PFM). IEEE, 2013. http://dx.doi.org/10.1109/isaf.2013.6748680.

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García, E., Z. B. Zhang, T. W. Coyle, S. E. Hao, and S. L. Mu. "Liquid Precursors Plasma Spraying of TiO2 and Ce- Doped Ba(Zr0.2Ti0.8)O3 Coatings." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p0650.

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Abstract In this work was studied the suitability of Solution/Suspension Precursors Plasma Spray (SPPS) technique to produce titanium dioxide (TiO2) and cerium doped barium zirconium titanate (Ce doped Ba(Zr0.2Ti0.8)O3 or BZT) coatings. The precursors were sol-gel solutions typically employed to produce powders of those compositions. We report on the formation of porous TiO2 coatings on stainless steel substrates. The microstructures found this coatings are characterized by features typically found in solution precursor plasma spray processes; a combination of melted and unmelted deposits and small hollow spheres. Transmission electron microscopy revealed submicron/nanocrystalline features forming those deposits. Anatase was the main crystalline phase present in the TiO2 coatings. The rutile phase was also found in the coatings. The photocatalytic activity of the coatings was measured and compared with the results obtained for commercial anatase powders dispersed in liquid. Preliminary results obtained for Ce doped Ba(Zr0.2Ti0.8) O3 coatings deposited on mild steel substrates showed microstructures and crystalline phases suitable for dielectric applications.
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Qianru Lin, Dennis Lund Lorenzen, and Danyang Wang. "Tailoring the physical properties of (Ba, Ca)(Ti, Zr)O3 - xSm2O3 nanocomposite films." In 2014 IEEE International Nanoelectronics Conference (INEC). IEEE, 2014. http://dx.doi.org/10.1109/inec.2014.7460439.

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Mahmud, Nurul Afifah, Anisah Shafiqah Habiballah, Nur Syafkeena Mohd Affandi, Nafisah Osman, and Abdul Mutalib Md Jani. "Activated carbon as dispersing agent in the synthesis of Ba(Ce,Zr)O3 ceramic electrolyte." In 3RD INTERNATIONAL SCIENCES, TECHNOLOGY & ENGINEERING CONFERENCE (ISTEC) 2018 - MATERIAL CHEMISTRY. Author(s), 2018. http://dx.doi.org/10.1063/1.5066971.

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He, Xingli, Ioanna Bakaimi, Nur Zatil Ismah Hashim, Yudong Wang, Ali Mostaed, Ian M. Reaney, Qi Luo, Steven Gao, Brian E. Hayden, and C. H. Kees De Groot. "(Ba, Sr)(Ti, Mn)O3 Perovskite Films for Co-Planar Waveguide Tunable Microwave Phase Shifters." In 2018 13th European Microwave Integrated Circuits Conference (EuMIC). IEEE, 2018. http://dx.doi.org/10.23919/eumic.2018.8539889.

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Wu, Adam Y. "(Pb,La)(Zr,Ti)O3, (Sr,Ba)TiO3, Ba2NaNb5O15, BaTiO3, LiNbO3, KNbO3, KTiOPO4, beta-BaB2O4, and LiB3O5 thin films for electrooptic applications." In OSA Annual Meeting. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/oam.1992.tuaa2.

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Abstract:
Thin films of (Pb,La)(Zr,Ti)O3, (Sr,Ba)TiO3, Ba2NaNb5O15, BaTiO3, LiNbO3, KNbO3, KTiOPO4, beta-BaB2O4, and LiB3O5, some of them highly oriented, have been deposited on various substrates by using rf magnetron sputtering and/or solution coating methods. All the films have the correct crystal structure and stoichiometry. Electro-optic effects and second harmonic generation in these films have been measured and will be presented. The potential applications of these films for integrated optics will be discussed.
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YAMADA, Tomoyuki, Ryoudou KAWASAKI, and Hitoshi ABE. "Fabrication Process and Calculated Characteristics of In/(Ba, Rb)BiO3/Sr(Ti, Nb)O3 Normal Conductor and Superconductor Base Transistors." In 1994 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 1994. http://dx.doi.org/10.7567/ssdm.1994.c-4-2.

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8

Chen, H. C., Q. Z. Jiang, X. L. Lu, and L. Chen. "Doping Modification Of Photorefractive Crystal Potassium Sodium Strontium Barium Niobate." In The European Conference on Lasers and Electro-Optics. Washington, D.C.: Optica Publishing Group, 1996. http://dx.doi.org/10.1364/cleo_europe.1996.ctuk75.

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Abstract:
During recent year, the photorefractive materials are attractive in many applications such as optical image processing and optical computing because they have more lower threshold power and easily realize phase conjugation Potassium sodium strontium barium niobate crystal is one of the best candidates. It has open structure and large structure tolerance for dopants with different valence There are two different ways to improve the photorefractive properties of the materials. 1) by adjusting the composition of materials and 2) doping cation ions. This paper is to describe the doping effects on the ferroelectric and photorefractive properties. The composition of potassium sodium strontium barium niobate was chosen as 92% of A-sites occupied by K, Na, Sr and Ba ions. The dopants such as Ce, Pr, Fe, Co, Ni, Cu, Ti and Mn with 0.01-0.1wt% were adopted for modifying the properties. Potassium sodium strontium barium niobate crystals were grown from platinum crucible by Czochralski method with induction heating in air atmosphere. The growth conditions are pulling direction: [001], the rate of pulling/rotation: 0.2-0.4. The size of as-grown crystal is up to ϕ 35 × 35 mm From the shape of hysteresis loops, the doping effect on ferroelectric properties of potassium sodium strontium barium niobate crystals were revealed to have three categories: expansive, stable and shrink for Fe, Cu and others, respectively After the temperature recycle from 100 to 500K, the d33 value for Cu-doped crystal does not change, which suggest that the Cu ion is a good polarization stabilizer. The self-pumped phase conjugation refractivities for Ce, Co and Cu-doped crystals are much higher than the others. They are 70% at 514.5nm for Cu-doped, 73% at 514.5nm for Co-doped and 84% at 632.8nm for Ce-doped respectively.
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