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Investigation of Low Voltage Varistor Using TiO2 as Base Material and SiO2, Bi2O3 and WO3 as Dopants

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Abstract:

Varistor with TiO2 as the base and SiO2, WO3 and Bi2O3 as dopants were investigated to create a low voltage varistor. The physical, mechanical, microstructural and electrical properties were studied where the concentration of SiO2 was varied but the concentration of WO3 and Bi2O3 was fixed. Physical and mechanical characterization consisted of green and fired density, axial and radial shrinkage and Vickers Hardness. Electrical evaluation on the other hand consisted of non-linear coefficient, breakdown voltage, power loss and clamping ratio. Non-linear coefficient of 2.16, very low breakdown voltage of 5.538V/cm and minimal power loss of 0.0124mW was achieved. It was found that optimum results were achieved with 98.3% TiO2, 0.7% SiO2, 0.5%Bi2O3 and 0.5%WO3.

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Periodical:

Advanced Materials Research (Volume 1115)

Pages:

156-159

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.1115.156

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Online since:

July 2015

Authors:

Shahida Begum, Zarrin Kothadapani, Mokanaraju K. Selvaraj, Mohamed Muntasir

Keywords:

Electrical Properties, Mechanical Properties, Physical Properties, Silicon Dioxide, Titanium Dioxide, Varistor

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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