Bi4Ti3O12 modified low voltage ZnO-based varistors: microstructure, electrical properties and aging characteristics

被引:3
|
作者
Zhou, Huanfu [1 ]
Guo, Ruli [1 ,2 ]
Chu, Dongjin [2 ]
Chang, Baocheng [2 ]
Qin, Yuandong [2 ]
Fang, Liang [1 ]
机构
[1] Guilin Univ Technol, Guangxi Sci Expt Ctr Min Met & Environm, Key Lab New Proc Technol Nonferrous Met & Mat, Coll Mat Sci & Engn,Minist Educ, Guilin 541004, Peoples R China
[2] Guangxi New Future Informat Ind Co Ltd, Beihai 536000, Peoples R China
关键词
ZINC-OXIDE VARISTORS; CERAMICS;
D O I
10.1007/s10854-013-1513-7
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The effects of Bi4Ti3O12 addition on the microstructure, electrical properties and aging characteristics of ZnO-based varistors were investigated. The addition of Bi4Ti3O12 can reduce the formation of Zn2TiO4 spinel phase and promote the growth of ZnO grain. Bi4Ti3O12 doped ZnO-based varistors sintered at 1,130 A degrees C possessed excellent performance of I (L) = 2.9 mu A, E (1mA) = 29.7 V/mm, alpha = 30.2, and good surge absorption capability with %a-E-3 (1mA) = -3.5 % for 500 A 8/20 mu s impulse current. In addition, the varistors exhibited the most stable accelerated aging characteristics with %a-E-3 (1mA) = -0.3 % for DC accelerated aging stress of 125 A degrees C/7 h. These results revealed that Bi4Ti3O12 addition is highly beneficial to attain enhanced varistor properties of ZnO ceramics.
引用
收藏
页码:4987 / 4992
页数:6
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