Aqueous solution-gel synthesis of strontium bismuth niobate (SrBi2Nb2O9)

被引：23

作者：

Nelis, D ^{[1
]}

Van Werde, K ^{[1
]}

Mondelaers, D ^{[1
]}

Vanhoyland, G ^{[1
]}

Van den Rul, H ^{[1
]}

Van Bael, MK ^{[1
]}

Mullens, J ^{[1
]}

Van Poucke, LC ^{[1
]}

机构：

[1] Limburgs Univ Ctr, Lab Inorgan & Phys Chem, IMO, B-3590 Diepenbeek, Belgium

来源：

JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2003年 / 26卷 / 1-3期

关键词：

solution-gel process; aqueous; ferroelectricity; SrBi2Nb2O9 (SBN);

D O I：

10.1023/A:1020771126807

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：

The synthesis of multimetal oxides containing pentavalent elements like Nb and Ta out of an aqueous solution is very complicated due to the extremely high sensitivity of these metals towards hydrolysis. Moreover the only water-soluble starting compound is the oxalate which is not very suited for gel formation. Nevertheless, from Nb-oxalate it is possible to prepare a water-soluble Nb(V)-precursor by chemical modification. The synthesized precursor remains stable in the pH-range needed for gel formation. This Nb(V)-precursor is used for the synthesis of the ferroelectric material SrBi2Nb2O9 (SBN). An aqueous acetate-citrate solution-gel precursor for SBN was prepared. The chemical homogeneity of this precursor was investigated by means of TEM-experiments. All metal ions were found to be homogeneously dispersed in the precursor gel at least down to 10 nm. The SBN phase formation is followed by means of X-ray Diffraction. It has been shown that the perovskite phase already forms at 550degreesC.

引用

页码：1125 / 1129

页数：5

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