Sol-gel synthesis and properties of multiferroic BiFeO3

被引：225
作者：
Kim, JK
Kim, SS [1 ]
Kim, WJ
机构：
[1] Changwon Natl Univ, Dept Phys, Chang Won 641773, Kyungnam, South Korea
[2] Changwon Natl Univ, Inst Basic Sci, Chang Won 641773, Kyungnam, South Korea
来源：
MATERIALS LETTERS | 2005年 / 59卷 / 29-30期
基金：
新加坡国家研究基金会;
关键词：
crystal structure; growth from solutions; oxides; ferroelectric materials;
D O I：
10.1016/j.matlet.2005.07.050
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
High purity multiferroic BiFeO3 (BFO) powders were synthesized by sol-gel process using bismuth nitrate and iron nitrate as sources. The BFO powders annealed at 600 degrees C in nitrogen environment were mainly composed of a rhombohedral BiFeO3 phase (R-phase) with a minor impurity phase of Bi2O3. A pure BFO R-phase has been obtained by leaching out the minor Bi2O3 phase using diluted nitric acid. A reversible phase transformation of the BFO R-phase has been detected at 836 degrees C by a differential thermal analysis. The powders of BFO R-phase exhibits a uniform feature with the particle size of similar to 200 nm, The dielectric constant of the BFO R-phase is measured to be similar to 15 in the frequency range of 10(4)similar to 10(6) Hz at room temperature. (C) 2005 Elsevier B.V. All rights reserved.
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收藏
页码：4006 / 4009
页数：4
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