DEVELOPMENT OF ZINC OXIDE VARISTORS USING LOCALLY AVAILABLE MATERIALS.
Prof Evbogbai Edekin Jacob Mariekpen and Edeko F.O, Ajuwa C.I (Published 2011)
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Zinc oxide varistors were developed using locally available materials. The composition of the samples includes ZnO, 98; Bi2O3 and CoO 1% respectively. The compositions were mixed in a polyethylene container using zirconia balls. Cassava starch was a binder. The samples were passed using steel rings as moulds. The passed samples were sintered at 1260oC for 3 hours in an electric furnace. The samples were allowed to cool down to room temperature in the furnace. The electroded samples were subjected to electrical property measurements. The clamping ratio for sample 1 is 1.12, while sample 2 is 1.17. The breakdown voltages for the two samples are respectively 125 volts and 240 volts. The non-linear exponents a, were computed to be 71 for both samples. The production of the ZnO varistor would rejuvenate economic activities in the electrical sector, thereby promoting the development and utilization of huge solid minerals resources. It will also conserve our scare foreign exchange expended on the importation of foreign ones.
KEYWORDS:(Zinc oxide, Sintering, Electrode, Varistor, Surge Voltage, Protection)
|Item Type:||Journal article(non-copyrighted)|
|Format:||PDF document, 276.26 KB|
|Keywords:||Zinc oxide, Sintering, Electrode, Varistor, Surge Voltage, Protection|
|Field of Study:||Engineering- Electrical and Computer|
|Uploaded By:||Uddin Osemengbe Oyaimare|
|Date Added:||31 Oct 2017 8:40am|
|Last Modified:||22 Nov 2017|
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