Bi4Ti3O12 modified low voltage ZnO-based varistors: microstructure, electrical properties and aging characteristics期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

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

Authors:	Huanfu Zhou Ruli Guo Dongjin Chu Baocheng Chang Yuandong Qin Liang Fang

Affiliation:	1. Guangxi Scientific Experiment Center of Mining, Metallurgy and Environment, Key Laboratory of New Processing Technology for Nonferrous Metals and Materials, Ministry of Education, College of Materials Science and Engineering, Guilin University of Technology, Guilin, 541004, China 2. Guangxi New Future Information Industry Co. Ltd, Beihai, 536000, China

Abstract:	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 °C possessed excellent performance of I _L = 2.9 μA, E _1mA = 29.7 V/mm, α = 30.2, and good surge absorption capability with %△E _1mA = ?3.5 % for 500 A 8/20 μs impulse current. In addition, the varistors exhibited the most stable accelerated aging characteristics with %△E _1mA = ?0.3 % for DC accelerated aging stress of 125 °C/7 h. These results revealed that Bi₄Ti₃O₁₂ addition is highly beneficial to attain enhanced varistor properties of ZnO ceramics.

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