Structure, synthesis and high dielectric property of (NaBi)(NbCr)O6 pyrochlores

被引：3

作者：

Hsiao, Yu-Jen

Chang, Yen-Hwei ^{[1
]}

Fang, Te-Hua

Chang, Yee-Shin

Chai, Yin-Lai

机构：

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

[2] Natl Formosa Univ, Inst Mech & Electromech Engn, Yunlin 632, Taiwan

[3] Natl Formosa Univ, Inst Electroopt & Mat Sci, Yunlin 632, Taiwan

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

来源：

MATERIALS LETTERS | 2006年 / 60卷 / 29-30期

关键词：

dielectric; relaxation; solid-state reaction; pyrochlore; resistivity;

D O I：

10.1016/j.matlet.2006.03.078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Pyrochlores with composition (NaBi)(NbCr)06 Were sintered in the temperature range of 1100-1250 degrees C. Dielectric properties of the ceramics were investigated in a wide range of temperatures of- 15 to 200 degrees C and frequencies of 1-800 kHz. The suitable sintering temperatures for (NaBi)(NbCr)O-6 ceramics are suggested from 1150 to 1200 degrees C. The dielectric constant behavior reflects, in our opinion, the formation of the space charge and the orientational polarization. The pyrochlores have convex resistivity-temperature characteristics around the transition point, and exhibit the negative temperature coefficient of resistance characteristics. The activation energies of conductivity of samples were obtained at various sintering temperatures. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：3655 / 3659

页数：5

共 20 条

[1] Low-temperature dielectric relaxation in the pyrochlore (Bi3/4Zn1/4)2(Zn1/4Ta3/4)2O7 compound [J].