Synthesis of SrBi2Ta2O9 (SBT) by means of a soluble Ta(V) precursor

被引：29

作者：

Nelis, D ^{[1
]}

Van Werde, K ^{[1
]}

Mondelaers, D ^{[1
]}

Vanhoyland, G ^{[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 THE EUROPEAN CERAMIC SOCIETY | 2001年 / 21卷 / 10-11期

关键词：

perovskites; sol-gel processes; SrBi2Ta2O9 (SBT); tantalates;

D O I：

10.1016/S0955-2219(01)00169-8

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：

Aqueous sol-gel processing of pentavalent metals like Ta and Nib is very complicated since the only water soluble compound is the oxalate, which is not very suited for gel formation. Nevertheless, starting from Ta oxalate, it is possible to prepare a water soluble Ta(V) precursor that remains stable in the pH range needed for gel formation. During synthesis the oxalate is oxidized with H2O2 and subsequently complexed with citric acid and as a result the peroxo-citrato tantalum(V) complex is formed. This Ta(V) precursor is afterwards used for the synthesis of the ferroelectric SrBi2Ta2O9 (SBT). The formation of the SBT crystalline phases was investigated by means of high temperature X-ray diffraction (HT-XRD). (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：2047 / 2049

页数：3

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