A novel aqueous solution route to the low-temperature synthesis of SrBi2Nb2O9 by use of water-soluble Bi and Nb complexes

被引：54

作者：

Asai, T

Camargo, ER

Kakihana, M

Osada, M

机构：

[1] Tokyo Inst Technol, Mat & Struct Lab, Midori Ku, Yokohama, Kanagawa 2268503, Japan

[2] RIKEN, Inst Phys & Chem Res, Wako, Saitama 3510198, Japan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2000年 / 309卷 / 1-2期

关键词：

ferroelectrics; chemical synthesis; X-ray diffraction; phase transitions;

D O I：

10.1016/S0925-8388(00)01081-1

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 ; 081704 ;

摘要：

Powders of SrBi2Nb2O9 (SBN) were synthesized using an aqueous solution method from mixtures of all water-soluble compounds including Sr-EDTA, Bi-EDTA and Nb-citrate. Heating of a mixed aqueous solution with the molar ratio of Sr:Bi:Nb:citric acid=1:2:2:10 produced a pale-yellow gelatinous viscous matter without any precipitation, which was subsequently pyrolyzed at 300 degrees C to give a powder precursor for SBN. The formation of a pure Perovskite ferroelectric SBN occurred when the powder precursor was heat-treated in air at temperatures higher than 650 degrees C. A fluorite SBN formed in the 500-600 degrees C range, which appeared to act as an intermediate phase prior to the formation of the Perovskite SBN. The environmentally beneficial aspect of the present aqueous solution route was briefly discussed. (C) 2000 Elsevier Science S.A. All rights reserved.

引用

页码：113 / 117

页数：5

共 11 条

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