Hydrothermal synthesis and sintering of lanthanum chromite powders doped with calcium

被引：28
|
作者：
Rivas-Vázquez, LP
Rendón-Angeles, JC
Rodríguez-Galicia, JL
Zhu, K
Yanagisawa, K
机构：
[1] IPN, Ctr Invest & Estudios Avanzados, Unidad Saltillo, Saltillo 25000, Coahuila, Mexico
[2] Kochi Univ, Res Lab Hydrothermal Chem, Kochi 7808520, Japan
来源：
SOLID STATE IONICS | 2004年 / 172卷 / 1-4期
关键词：
hydrothermal treatment; interconector; lanthanum chromite; sintering; solid solution;
D O I：
10.1016/j.ssi.2004.03.021
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Precursor La-Ca gels of LaCrO3, La0.9Ca0.1CrO3 and La0.8Ca0.2CrO3 were prepared by coprecipitation and then crystallized under hydrothermal conditions. Under these conditions, mono dispersed nanosized ( < 300 nm) powders of LaCrO3 and its solid solutions doped with calcium were obtained at temperatures between 350 and 425degreesC. The powders were sintered in air at a temperature range of 1200-1500degreesC for intervals between I and 5 h. A maximum apparent density of 97.66% was preferentially achieved by pellets with the larger amount of Ca, La0.8Ca0.2CrO3, sintered at 1400degreesC for 5 h in air atmosphere. The average grain size measured on sintered specimens was of 6 mum. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：389 / 392
页数：4
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