(1. 中南工業(yè)大學(xué) 冶金科學(xué)與工程系, 長(zhǎng)沙 410083;
2. 四川大學(xué)(西區(qū)) 化工系, 成都 610065)
摘 要: 通過對(duì)兩種共沉法制備摻雜氧化鋅壓敏電阻的研究，證明包膜共沉法比混合離子共沉法更易恒定組成， 并且具有更好的壓敏性能。 通過對(duì)包膜共沉條件包括溫度、 分散劑、 攪拌強(qiáng)度等的進(jìn)一步研究， 確定了包膜共沉的最佳條件。用此法制得的壓敏電阻， 其主要電性能指標(biāo)達(dá)到： 泄漏電流50 μA， 擊穿電壓180 V/mm， 最大非線性系數(shù)44。
關(guān)鍵字: 共沉淀； 包膜共沉淀； 摻雜；氧化鋅壓敏電阻
（1. Department of Metallurgy Science and Engineering， Central South Universityof Technology， Changsha 410083, P.R.China;
2. Department of Chemical Engineering， Sichuan University, Chengdu 610065, P.R.China）
Abstract:The research results of preparing zinc oxide varistor ceramic powders by coprecipitation process show that the coprecipitationcoating process obtained constantcomponents more easily than the ionmixing coprecipitation process， and displayed excellent performances. By means of further investigating of coprecipitation conditions temperature， the surfactants and the degree of agitation， the optimal coprecipitation conditions were determined. Varistors prepared by coprecipitation chemical method display electrical properties leak current 50 μA，strike out voltage 180 V/mm and the biggest nonlinearity coefficient 44.
Key words: coprecipitation； coprecipitationcoating； zinc oxide varistor
