Synthesis of nanocrystalline solid solutions based on zirconia and hafnia

被引：4

作者：

Panova, T. I. ^{[1
]}

Glushkova, V. B. ^{[1
]}

Lapshin, A. E. ^{[1
]}

机构：

[1] Russian Acad Sci, Grebenshchikov Inst Silicate Chem, St Petersburg 199034, Russia

来源：

GLASS PHYSICS AND CHEMISTRY | 2008年 / 34卷 / 02期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S1087659608020156

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：

Nanosized (2-8 nm) amorphous powders of the solid solution based on zirconia and hafnia are synthesized through back coprecipitation upon treatment of gels at temperatures from +20 to -77 degrees C. Heat treatment of these powders at temperatures up to 1000 and above 1100 degrees C leads to the formation of cubic (fluorite type, O(h)(5)supercript stop = Fm3m) and tetragonal phases of the Zr82Hf10Y3Ce5O (x) composition, respectively. It is revealed that a decrease in the synthesis temperature (from +20 degrees C to -6 degrees C) results in a decrease in the size of gel agglomerates from 30 to 1 mu m. Recrystallization processes in the gels prepared using cryochemical treatment are developed very slowly in the temperature range 500-1200 degrees C (the crystallite size does not exceed 25 nm).

引用

页码：206 / 212

页数：7

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