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Title: A few aspects about the manufacturing process of five and two additives metal oxides varistors [articol]
Authors: Frigură-Iliasa, Mihaela
Tămaş, Andra Dana
Subjects: Inginerie chimică
Manufacturing process
Five and two additives
Metal oxides varistors
Issue Date: 2004
Publisher: Timişoara : Editura Politehnica
Citation: Frigură-Iliasa, Mihaela. A few aspects about the manufacturing process of five and two additives metal oxides varistors. Timişoara: Editura Politehnica, 2008
Series/Report no.: Buletinul ştiinţific al Universităţii „Politehnica” din Timişoara, România. Seria chimie şi ingineria mediului, Tom 53(67), fasc. 1-2 (2008), p. 282-285
Abstract: 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 [1]. Table 1 shows the initial chemical composition of the varistor. The last four additives will be lost by evaporation after finishing the manufacturing process [2].
URI: http://localhost:8080/xmlui/handle/123456789/4066
Appears in Collections:Articole stiintifice/Scientific articles

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