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标题：A Few Aspects about the Manufacturing Process of Five and Two Additives Metal Oxides Varistors
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作者：M. Frigura-Iliasa, A. Tamas
期刊名称：Universitatea Politehnica din Timisoara. Buletinul Stiintific. Seria Chimie si Ingineria Mediului
印刷版ISSN：1224-6018
出版年度：2008
卷号：53(67)
期号：01-02
出版社：Universitatea Politehnica din Timisoara
摘要：ZnO based varistors are today used for making state of the art surge arresters for all voltage levels. Essentially they are “n” semi-conductor ceramics made of ZnO (more than 90% molar percents) and many other oxides having different structural roles. This paper presents a new manufacturing technology based on 2 additional oxides Cr₂O₃ and MnO₂, compared with the old one, having five oxides (Cr₂O₃, MnO₂, Co₃O₄, Bi₂O₃, NiO). This varistor material has a smaller electrical capacity, suitable for telecommunication applications. The chemical compositions of this new material as well as all the phases of the manufacturing process are presented too.
关键词：manufacturing process, five and two additives, metal oxides varistors