Combustion synthesis of nanometric powders of LaPO4 and Sr-substituted LaPO4

被引：80

作者：

Gallini, S ^{[1
]}

Jurado, JR ^{[1
]}

Colomer, MT ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, E-28049 Madrid, Spain

来源：

CHEMISTRY OF MATERIALS | 2005年 / 17卷 / 16期

关键词：

D O I：

10.1021/cm047945q

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 [物理化学]; 081704 [应用化学];

摘要：

La(1-x)Sr(x)PO4 materials are very stable at high temperature and water vapor partial pressure and they show protonic conductivity; thus, they could be used as electrolytes in HTPFCs (high-temperature protonic fuel cells), hydrogen sensors, and hydrogen separation technology. This work describes the combustion synthesis of La(1-x)Sr(x)PO4 powders (x = 0, 0.025, 0.050) from mixtures of La(NO3)(3)center dot 6H(2)O and Sr(NO3)(2) as cation precursors, (NH4)(2)HPO4 as anion precursor, and urea as fuel. The characterization of the as-prepared combustion products showed that combustion synthesis provides a straightforward method for the achievement of solid solutions of these materials as nanometric powders. Furthermore, dilatometric studies reveal that dense ceramics can be obtained at low sintering temperature (1300 degrees C), in air, from the synthesized nanometric powders.

引用

页码：4154 / 4161

页数：8

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