Reactive ceria nanopowders via carbonate precipitation

被引：88

作者：

Li, JG ^{[1
]}

Ikegami, T ^{[1
]}

Wang, YR ^{[1
]}

Mori, T ^{[1
]}

机构：

[1] Natl Inst Mat Sci, Adv Mat Lab, Tsukuba, Ibaraki 3050044, Japan

来源：

JOURNAL OF THE AMERICAN CERAMIC SOCIETY | 2002年 / 85卷 / 09期

关键词：

D O I：

10.1111/j.1151-2916.2002.tb00465.x

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanocrystalline CeO2 powders have been successfully synthesized via a carbonate precipitation method, using ammonium carbonate (AC) as the precipitant and cerium nitrate hexahydrate as the cerium source. The AC/Ce3+ molar ratio (R) affects significantly precursor properties, and spherical nanoparticles can be produced only in a narrow range of 2 < R less than or equal to 3. The precursor, having an approximate composition of Ce(OH)CO3.2.5H(2)O, decomposes to CeO2 at temperatures greater than or equal to300degreesC. The CeO2 powder calcined at 700degreesC exhibits high reactivity and can be densified to >99% of theoretical at 1000degreesC.

引用

页码：2376 / 2378

页数：3

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