Effect of step sintering on breakdown voltage of varistors prepared from nanomaterials by sol gel route

Pillai, S. C. and Kelly, J. M. and McCormack, D. E. and Ramesh, R. (2006) Effect of step sintering on breakdown voltage of varistors prepared from nanomaterials by sol gel route. Advances in Applied Ceramics, 105 (3). pp. 158-160. ISSN 1743-6753

[img]
Preview
PDF
Effect of Step Sintering on Breakdown Voltage of Varistors Prepar.pdf

Download (259kB) | Preview
Official URL: http://dx.doi.org/10.1179/174367606X110189

Abstract

ZnO varistor materials were prepared by a sol gel route with subsequent drying and calcination. Varistor discs fabricated from these materials were subjected to a two step sintering schedule. Therefore in a typical experiment, the samples were heated to 1000uC, then allowed to cool for over 30 min to 900uC and held there for 6 h. The results were compared with commercial varistor samples sintered in a similar way. Considerably higher breakdown voltages were obtained for the varistorsmade from nanosample (1192¡30 V mm21) compared with the commercial samples (723 ¡30 V mm21) sintered under the same experimental conditions. The sintered materials were characterised by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and density measurements.

Item Type: Article
Departments or Groups: South East Applied Materials Research Centre
Divisions: School of Engineering
Depositing User: Ramesh Raghavendra
Date Deposited: 12 Mar 2014 10:14
Last Modified: 22 Aug 2016 10:27
URI: http://repository.wit.ie/id/eprint/2781

Actions (login required)

View Item View Item