Processing of zinc oxide varistors : sources of defects and possible measures for their elimination

Karim, A. N. Mustafizul and Begum, Shahida and Hashmi, M. S. J. (1997) Processing of zinc oxide varistors : sources of defects and possible measures for their elimination. Studies in Applied Mechanics, 45 (C). pp. 143-153. ISSN 0922-5382

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Abstract

The processing of ZnO varistors primarily follows the conventional ceramic route. A number of dopants are added to zinc oxide powder to prepare the constituent material and some additional finishing operations are performed for securing the varistor action. Thus there involved a large number of processing operations and there are naturally multiple sources from which defects can originate. To quality a varistor performance several parameters are commonly investigated of which energy absorption capability of the device is a significant one. In this respect flaws and defects developed in the varistor body during the processing have detrimental effects and can considerably restrict the energy absorption capability. This paper briefly outlines the probable sources of defects of the metal-oxide varistor device and their possible solutions mainly with sintering orientation, passivation thickness and electrode area.

Item Type:	Article (Journal)
Uncontrolled Keywords:	Zinc oxide,
Subjects:	T Technology > T Technology (General) > T55.4 Industrial engineering.Management engineering. > T58.7 Production capacity. Manufacturing capacity
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Manufacturing and Materials Engineering
Depositing User:	Prof. Dr. A. N. Mustafizul Karim
Date Deposited:	19 May 2013 11:28
Last Modified:	19 May 2013 11:28
URI:	http://irep.iium.edu.my/id/eprint/26857

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