Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle

Zinc oxide varistor blocks are commonly pressed by the double action uniaxial compaction technique. The pressing cycle, similar to that followed in the case of conventional ceramic processing, composes of applying a load on the varistor powder (filled in the die by a suitable filling mechanism), a...

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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:	1996
Subjects:	T58.7 Production capacity. Manufacturing capacity
Online Access:	http://irep.iium.edu.my/26855/ http://irep.iium.edu.my/26855/1/Press_cycle_%2302.pdf

id	iium-26855
recordtype	eprints
spelling	iium-268552013-09-09T07:05:45Z http://irep.iium.edu.my/26855/ Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J. T58.7 Production capacity. Manufacturing capacity Zinc oxide varistor blocks are commonly pressed by the double action uniaxial compaction technique. The pressing cycle, similar to that followed in the case of conventional ceramic processing, composes of applying a load on the varistor powder (filled in the die by a suitable filling mechanism), accompanied by holding or dwell time at different phases of loading. This holding time in the form of pre-press dwell. press dwell and ejection delay are maintained respectively atlow pressure, at peak pressure and at no pressure prior to ejection. The dwell allows the material under compaction to rearrange and expels the trapped air or gas, thereby helping to reduce the inter and intra-particle pores. Thus this enhanced property of the green body is secured with the aim of attaining improved sintered properties of the ceramic. The present study which uses two level factorial design to assess the effect of dwell reveals that improvement in varistor performance is not achieved by randomly increasing the duraLion of dwell. Rather the varistor properties are found to be influenced by the individual as well as the interactive effects of the variables leaving scope for optimization, The investigation consisted of testing the energy absorption capability of varistors injected by a long duration pulse. and the high current performance of those subjected to a short duration pulse. 1996-06-16 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/26855/1/Press_cycle_%2302.pdf Karim, A.N. Mustafizul and Puyane, R. and El-Baradie, M.A and Hashmi, M. S. J. (1996) Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle. In: International Congress on Advances in Powder Metallugy and Particulate Material, 16-21 June 1996, Washingto D. C..
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T58.7 Production capacity. Manufacturing capacity
spellingShingle	T58.7 Production capacity. Manufacturing capacity Karim, A.N. Mustafizul Puyane, R. El-Baradie, M.A Hashmi, M. S. J. Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
description	Zinc oxide varistor blocks are commonly pressed by the double action uniaxial compaction technique. The pressing cycle, similar to that followed in the case of conventional ceramic processing, composes of applying a load on the varistor powder (filled in the die by a suitable filling mechanism), accompanied by holding or dwell time at different phases of loading. This holding time in the form of pre-press dwell. press dwell and ejection delay are maintained respectively atlow pressure, at peak pressure and at no pressure prior to ejection. The dwell allows the material under compaction to rearrange and expels the trapped air or gas, thereby helping to reduce the inter and intra-particle pores. Thus this enhanced property of the green body is secured with the aim of attaining improved sintered properties of the ceramic. The present study which uses two level factorial design to assess the effect of dwell reveals that improvement in varistor performance is not achieved by randomly increasing the duraLion of dwell. Rather the varistor properties are found to be influenced by the individual as well as the interactive effects of the variables leaving scope for optimization, The investigation consisted of testing the energy absorption capability of varistors injected by a long duration pulse. and the high current performance of those subjected to a short duration pulse.
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	Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
title_short	Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
title_full	Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
title_fullStr	Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
title_full_unstemmed	Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
title_sort	long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle
publishDate	1996
url	http://irep.iium.edu.my/26855/ http://irep.iium.edu.my/26855/1/Press_cycle_%2302.pdf
first_indexed	2023-09-18T20:39:56Z
last_indexed	2023-09-18T20:39:56Z
_version_	1777409297395744768

Long and short duration pulse performance of zinc oxide varistor compacted with modified pressing cycle

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