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

S. C. Pillai; J. M. Kelly; D. E. McCormack; R. Ramesh

doi:10.1179/174367606X110189

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

S. C. Pillai, J. M. Kelly, D. E. McCormack, R. Ramesh

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19 Citations (Scopus)

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.

Original language	English
Pages (from-to)	158-160
Journal	Advances in Applied Ceramics
Volume	105
Issue number	3
DOIs	https://doi.org/10.1179/174367606X110189
Publication status	Published - 2006

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title = "Effect of step sintering on breakdown voltage of varistors prepared from nanomaterials by sol gel route",

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.",

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year = "2006",

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T1 - Effect of step sintering on breakdown voltage of varistors prepared from nanomaterials by sol gel route

AU - Pillai, S. C.

AU - Kelly, J. M.

AU - McCormack, D. E.

AU - Ramesh, R.

PY - 2006

Y1 - 2006

N2 - 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.

AB - 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.

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DO - 10.1179/174367606X110189

M3 - Article

SN - 1743-6753

VL - 105

SP - 158

EP - 160

JO - Advances in Applied Ceramics

JF - Advances in Applied Ceramics

IS - 3

ER -

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

Abstract

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