Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions

I-V characteristics, wattloss behavior and energy absorption capability etc. are the critical characteristics for performance evaluation of ZnO varistors. In the long processing steps of this electro-ceramic with a considerable number of contributing variables, the preparation of pressing grade ele...

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Main Authors:	Begum, Shahida, Karim, A.N. Mustafizul, Hashmi, M. S. J.
Format:	Conference or Workshop Item
Language:	English
Published:	2006
Subjects:	T Technology (General) T58.7 Production capacity. Manufacturing capacity
Online Access:	http://irep.iium.edu.my/26871/ http://irep.iium.edu.my/26871/1/UM__Spray_dry%2314_.pdf

id	iium-26871
recordtype	eprints
spelling	iium-268712016-07-28T05:27:52Z http://irep.iium.edu.my/26871/ Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions Begum, Shahida Karim, A.N. Mustafizul Hashmi, M. S. J. T Technology (General) T58.7 Production capacity. Manufacturing capacity I-V characteristics, wattloss behavior and energy absorption capability etc. are the critical characteristics for performance evaluation of ZnO varistors. In the long processing steps of this electro-ceramic with a considerable number of contributing variables, the preparation of pressing grade electro-ceramic materials is very important. It demands powders with high degree of compositional and microstructural homogeneity, high purity and reliability, proper shape and proper size and distribution. This kind of ceramic powder can be generated by spray drying. Apart from affecting the physical properties of varistor discs, the powder characteristics influence the grain growth and microstructure which are anticipated to affect the electrical behavior of the discs. To investigate this, varistor powder was produced from standard slurry under different spray drying conditions in pilot scale. Feed flow rate, atomizing air pressure and outlet drying air temperature were considered as input variables and nominal voltage, wattloss, clamp ratio, non-linear co-efficient and energy absorption capability were considered as response. It was found that nominal voltage, wattloss and energy absorption capability was highly influenced by spray drying variables but no significant influence was observed on clamp ratio and nonlinear co-efficient for both the pre-breakdown and breakdown region. Not only high but consistent energy absorption capability was achieved by optimizing spray drying conditions. Thus optimization of spray drying variables could help securing desirable varistor characteristics and enhanced reliability of the electrical system. 2006 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/26871/1/UM__Spray_dry%2314_.pdf Begum, Shahida and Karim, A.N. Mustafizul and Hashmi, M. S. J. (2006) Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions. In: 1st International Conference and 7th AUN/SEED - Field wise Seminar on Manufacturing Material Processing (ICMM2006), 14-16 March 2006, Kuala Lumpur.
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T Technology (General) T58.7 Production capacity. Manufacturing capacity
spellingShingle	T Technology (General) T58.7 Production capacity. Manufacturing capacity Begum, Shahida Karim, A.N. Mustafizul Hashmi, M. S. J. Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
description	I-V characteristics, wattloss behavior and energy absorption capability etc. are the critical characteristics for performance evaluation of ZnO varistors. In the long processing steps of this electro-ceramic with a considerable number of contributing variables, the preparation of pressing grade electro-ceramic materials is very important. It demands powders with high degree of compositional and microstructural homogeneity, high purity and reliability, proper shape and proper size and distribution. This kind of ceramic powder can be generated by spray drying. Apart from affecting the physical properties of varistor discs, the powder characteristics influence the grain growth and microstructure which are anticipated to affect the electrical behavior of the discs. To investigate this, varistor powder was produced from standard slurry under different spray drying conditions in pilot scale. Feed flow rate, atomizing air pressure and outlet drying air temperature were considered as input variables and nominal voltage, wattloss, clamp ratio, non-linear co-efficient and energy absorption capability were considered as response. It was found that nominal voltage, wattloss and energy absorption capability was highly influenced by spray drying variables but no significant influence was observed on clamp ratio and nonlinear co-efficient for both the pre-breakdown and breakdown region. Not only high but consistent energy absorption capability was achieved by optimizing spray drying conditions. Thus optimization of spray drying variables could help securing desirable varistor characteristics and enhanced reliability of the electrical system.
format	Conference or Workshop Item
author	Begum, Shahida Karim, A.N. Mustafizul Hashmi, M. S. J.
author_facet	Begum, Shahida Karim, A.N. Mustafizul Hashmi, M. S. J.
author_sort	Begum, Shahida
title	Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
title_short	Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
title_full	Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
title_fullStr	Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
title_full_unstemmed	Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
title_sort	performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions
publishDate	2006
url	http://irep.iium.edu.my/26871/ http://irep.iium.edu.my/26871/1/UM__Spray_dry%2314_.pdf
first_indexed	2023-09-18T20:39:58Z
last_indexed	2023-09-18T20:39:58Z
_version_	1777409299601948672

Performance evaluation of zinc oxide varistor produced from powder under different spray drying conditions

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