Dielectric properties of valence compensated Ca1-xBixTi1-xCrxO3 perovskite prepared using the sol-gel process

被引：9

作者：

Chung, Ching-Chang ^{[2
]}

Chai, Yin-Lai ^{[1
]}

Chang, Yee-Shin ^{[3
]}

机构：

[1] Dahan Inst Technol, Dept Resources Engn, Hualien 971, Taiwan

[2] Natl Cheng Kung Univ, Dept Mat Sci & Engn, Tainan 701, Taiwan

[3] Natl Formosa Univ, Dept Elect Engn, Huwei 632, Yunlin, Taiwan

来源：

JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2008年 / 69卷 / 08期

关键词：

ceramics; sol-gel growth; X-ray diffraction; crystal structure;

D O I：

10.1016/j.jpcs.2007.11.028

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Ca1-xBixNb1-xCrxO3 (x = 0.01-0.5) ceramic powders were synthesized using the sol-gel process. The single-phase solids can be presented at x = 0.01 and 0.03. The coexistence of orthorhombic perovskite and the secondary phase of BiCrO3 was verified, as presented for x = 0.05-0.5. Grains with a micro-cube topography were obtained for x = 0.3-0.5. The average grain size is about 0.4 and 1.1 mu m for x = 0.3 and 0.5, respectively. The highest dielectric constant peak was measured at around 55 degrees C for x = 0.5 and at 75 degrees C for x = 0.3. The high dielectric constant was caused by the formation of barrier layers at the interface of the bi-phase mixed ceramics. Space charge polarization contributed to the observed behavior. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：1877 / 1882

页数：6

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