scholarly journals Formation of solid solutions in wide miscibility-gap perovskite-type oxide system of Ba1−xCaxZrO3 over the entire Ca composition range

2020 ◽  
Vol 128 (2) ◽  
pp. 80-83
Author(s):  
Miho AKO ◽  
Jun-ichi FUJISAWA ◽  
Minoru HANAYA
Keyword(s):  
Solid Solutions ◽  
Composition Range ◽  
Oxide System ◽  
Miscibility Gap ◽  
Perovskite Type Oxide ◽  
Perovskite Type

Methane combustion and CO oxidation on LaAl1−xMnxO3 perovskite-type oxide solid solutions

2003 ◽  
Vol 43 (4) ◽  
pp. 397-406 ◽  
Author(s):  
S Cimino ◽  
L Lisi ◽  
S De Rossi ◽  
M Faticanti ◽  
P Porta
Keyword(s):  
Co Oxidation ◽  
Solid Solutions ◽  
Methane Combustion ◽  
Perovskite Type Oxide ◽  
Perovskite Type

Crystal Structure Analysis of Barium Titanate – Bismuth Perovskite-Type Oxide System Ceramics and their Piezoelectric Property

2009 ◽  
Vol 421-422 ◽  
pp. 38-41 ◽  
Author(s):  
Keisuke Yamato ◽  
Nobuhiro Kumada ◽  
Chikako Moriyoshi ◽  
Yoshihiro Kuroiwa ◽  
Bong Yeon Lee ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Single Phase ◽  
Raw Materials ◽  
Crystal Structure Analysis ◽  
Oxide System ◽  
Electric Field Dependence ◽  
Perovskite Type Oxide ◽  
Bismuth Perovskite ◽  
Perovskite Type ◽  
Curie Temperature Tc

Barium titanate (BaTiO3, BT) – bismuth lanthanum zinc titanium oxide [(BiyLa1-y)(Zn0.5Ti0.5)O3, ByL1-yZT] solid solution ceramics were prepared to enhance Curie temperature (TC) of BT, 132 °C, to 200 °C. As the raw materials, nanoparticles were used to make sintering temperatures lower. Optimization of calcination and sintering conditions resulted in a formation of a perovskite single-phase, and their densities were always greater than 94 %. The synchrotron XRD measurement revealed that the crystal structures were assigned to rhombohedral 3m. Temperature dependence of dielectric property revealed that for the 0.5BT-0.5BZT ceramics, TC was 230 °C. Moreover, La-doping into BT-BZT ceramics resulted in decrease of TC significantly. Finally, their piezoelectric properties were measured by electric-field dependence of strain at room temperature, and for the 0.6BT-0.4BZT ceramics, the apparent d33 was measured at 250 pC/N.

LaAl1–xMnxO3 perovskite-type oxide solid solutions: structural, magnetic and electronic properties

2003 ◽  
Vol 5 (7) ◽  
pp. 1467-1473 ◽  
Author(s):  
Dante Cordischi ◽  
Marco Faticanti ◽  
Giuliano Minelli ◽  
Manlio Occhiuzzi ◽  
Piero Porta
Keyword(s):  
Electronic Properties ◽  
Solid Solutions ◽  
Perovskite Type Oxide ◽  
Perovskite Type

scholarly journals Thermoelectric properties of perovskite-type oxide system having A-site vacancy, Ca1-xLa2x/3□x/3MnO3

2010 ◽  
Vol 35 (3) ◽  
pp. 499-502 ◽  
Author(s):  
Hiroshi Kawakami ◽  
Mayuka Anzai ◽  
Mina Sugimoto ◽  
Toshio Takayama ◽  
Hiroshi Yamamura
Keyword(s):  
Thermoelectric Properties ◽  
Oxide System ◽  
Perovskite Type Oxide ◽  
A Site ◽  
Perovskite Type ◽  
Site Vacancy

scholarly journals Piezoelectric properties of high Curie temperature barium titanate–bismuth perovskite-type oxide system ceramics

2010 ◽  
Vol 108 (9) ◽  
pp. 094114 ◽  
Author(s):  
Satoshi Wada ◽  
Keisuke Yamato ◽  
Petr Pulpan ◽  
Nobuhiro Kumada ◽  
Bong-Yeon Lee ◽  
...  
Keyword(s):  
Barium Titanate ◽  
Curie Temperature ◽  
Piezoelectric Properties ◽  
Oxide System ◽  
High Curie Temperature ◽  
Perovskite Type Oxide ◽  
Bismuth Perovskite ◽  
Perovskite Type

First-principles Studies of Phase Stability and the Neutral Atomic Vacancies in LiNbO3, NaNbO3 and KNbO3

2005 ◽  
Vol 902 ◽  
Author(s):  
Akio Shigemi ◽  
Takahiro Wada
Keyword(s):  
Enthalpy Of Formation ◽  
Density Functional ◽  
Formation Energy ◽  
Type Structure ◽  
Enthalpies Of Formation ◽  
Functional Formalism ◽  
Reducing Atmosphere ◽  
Perovskite Type Oxide ◽  
Formation Energies ◽  
Perovskite Type

AbstractWe overall evaluated the enthalpies of formation and the formation energies of neutral vacancies in ANbO3 (A = Li, Na, K) using a plane-wave pseudopotential method within a density functional formalism. The LiNbO3 phase with the LiNbO3-type structure was confirmed to have lower enthalpy of formation than that with perovskite- or ilmenite-type structure. The NaNbO3 (R3c) and KNbO3 (Bmm2 and R3m) phases with the lowest symmetry were found to have the lowest enthalpy of formation. The formation energy of a A vacancy was found to be the lowest under an oxidizing atmosphere and that of an O vacancy was found to be the lowest under a reducing atmosphere. The formation energy of a Nb vacancy was the highest under both oxygen-rich and -poor conditions. These results are in agreement with the empirical rule that B site defects in perovskite-type oxide do not exist.

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