Effect of compaction parameters on the physical properties of zinc oxide varistor discs

A homogeneous compact body with higher green density and less gradient is expected to yield a uniform body with higher fired density and minimum shape distortion. Compaction parameters are optimised accordingly to achieve the necessary green property. There are various parameters in the process of p...

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Main Authors:	Karim, A.N. Mustafizul, Puyane, R., El-Baradie, M.A, Hashmi, M. S. J.
Format:	Conference or Workshop Item
Language:	English
Published:	Nanyang Technological University 1995
Subjects:	TA349 Mechanics of engineering. Applied mechanics
Online Access:	http://irep.iium.edu.my/26854/ http://irep.iium.edu.my/26854/1/Compaction_%2301.pdf

id	iium-26854
recordtype	eprints
spelling	iium-268542013-09-09T07:23:11Z http://irep.iium.edu.my/26854/ Effect of compaction parameters on the physical properties of zinc oxide varistor discs Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J. TA349 Mechanics of engineering. Applied mechanics A homogeneous compact body with higher green density and less gradient is expected to yield a uniform body with higher fired density and minimum shape distortion. Compaction parameters are optimised accordingly to achieve the necessary green property. There are various parameters in the process of powder compaction. Nevertheless, the present study has been confined to only.two significant variables - compacting stress and speed. It has already been established that higher compaction stress for a particular speed or lower pressing speed for a particular stress leads to higher green density. However, the effect of these parameters following sintering does not remain the same. This study with two level factorial design has been performed to observe systematically the effect of compaction stress and speed on the physical properties of the varistor discs both at the green as well as at the fired state. Green discs prepared from standard zinc oxide varistor powder were sintered in a pot kiln and in a single run to avoid the variation of sintering influence on different samples. Discs pressed with lower speed eventually exhibited lower fired density in contrast to their slightly higher green density. Other sintering features such as shrinkage, dimensional deformation in the form of mid-height depression are also found to be dependent on these parameters. Nanyang Technological University 1995-06-08 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/26854/1/Compaction_%2301.pdf Karim, A.N. Mustafizul and Puyane, R. and El-Baradie, M.A and Hashmi, M. S. J. (1995) Effect of compaction parameters on the physical properties of zinc oxide varistor discs. In: International Conference on Mechanics of Solids and Materials Engineering, 8-10 June 1995, Singapore.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	TA349 Mechanics of engineering. Applied mechanics
spellingShingle	TA349 Mechanics of engineering. Applied mechanics Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J. Effect of compaction parameters on the physical properties of zinc oxide varistor discs
description	A homogeneous compact body with higher green density and less gradient is expected to yield a uniform body with higher fired density and minimum shape distortion. Compaction parameters are optimised accordingly to achieve the necessary green property. There are various parameters in the process of powder compaction. Nevertheless, the present study has been confined to only.two significant variables - compacting stress and speed. It has already been established that higher compaction stress for a particular speed or lower pressing speed for a particular stress leads to higher green density. However, the effect of these parameters following sintering does not remain the same. This study with two level factorial design has been performed to observe systematically the effect of compaction stress and speed on the physical properties of the varistor discs both at the green as well as at the fired state. Green discs prepared from standard zinc oxide varistor powder were sintered in a pot kiln and in a single run to avoid the variation of sintering influence on different samples. Discs pressed with lower speed eventually exhibited lower fired density in contrast to their slightly higher green density. Other sintering features such as shrinkage, dimensional deformation in the form of mid-height depression are also found to be dependent on these parameters.
format	Conference or Workshop Item
author	Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J.
author_facet	Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J.
author_sort	Karim, A.N. Mustafizul
title	Effect of compaction parameters on the physical properties of zinc oxide varistor discs
title_short	Effect of compaction parameters on the physical properties of zinc oxide varistor discs
title_full	Effect of compaction parameters on the physical properties of zinc oxide varistor discs
title_fullStr	Effect of compaction parameters on the physical properties of zinc oxide varistor discs
title_full_unstemmed	Effect of compaction parameters on the physical properties of zinc oxide varistor discs
title_sort	effect of compaction parameters on the physical properties of zinc oxide varistor discs
publisher	Nanyang Technological University
publishDate	1995
url	http://irep.iium.edu.my/26854/ http://irep.iium.edu.my/26854/1/Compaction_%2301.pdf
first_indexed	2023-09-18T20:39:56Z
last_indexed	2023-09-18T20:39:56Z
_version_	1777409297246846976

Effect of compaction parameters on the physical properties of zinc oxide varistor discs

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