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

Surech 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

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

School of Chemical and BioPharmaceutical Science

Research output: Contribution to journal › Article › peer-review

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 1000°C, then allowed to cool for over 30 min to 900°C 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 varistors made from nanosample (1192±30 V mm^-1) compared with the commercial samples (723 ±30 V mm^-1) 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
Number of pages	3
Journal	Advances in Applied Ceramics
Volume	105
Issue number	3
DOIs	https://doi.org/10.1179/174367606X110189
Publication status	Published - Jun 2006

Keywords

Dopants
Grain growth
Nano
Sintering
Varistors
ZnO

Access to Document

10.1179/174367606X110189

https://arrow.tudublin.ie/cenresart/25Licence: CC BY-NC-SA

Cite this

@article{36e98fad61314f68a1fdeb4413f6d1ba,

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 1000°C, then allowed to cool for over 30 min to 900°C 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 varistors made from nanosample (1192±30 V mm-1) compared with the commercial samples (723 ±30 V mm-1) 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.",

keywords = "Dopants, Grain growth, Nano, Sintering, Varistors, ZnO",

author = "Pillai, \{Surech C.\} and Kelly, \{J. M.\} and McCormack, \{D. E.\} and R. Ramesh",

year = "2006",

month = jun,

doi = "10.1179/174367606X110189",

language = "English",

volume = "105",

pages = "158--160",

journal = "Advances in Applied Ceramics",

issn = "1743-6753",

publisher = "SAGE Publications Ltd",

number = "3",

}

TY - JOUR

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

AU - Pillai, Surech C.

AU - Kelly, J. M.

AU - McCormack, D. E.

AU - Ramesh, R.

PY - 2006/6

Y1 - 2006/6

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 1000°C, then allowed to cool for over 30 min to 900°C 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 varistors made from nanosample (1192±30 V mm-1) compared with the commercial samples (723 ±30 V mm-1) 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 1000°C, then allowed to cool for over 30 min to 900°C 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 varistors made from nanosample (1192±30 V mm-1) compared with the commercial samples (723 ±30 V mm-1) 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.

KW - Dopants

KW - Grain growth

KW - Nano

KW - Sintering

KW - Varistors

KW - ZnO

UR - https://www.scopus.com/pages/publications/33746074083

U2 - 10.1179/174367606X110189

DO - 10.1179/174367606X110189

M3 - Article

AN - SCOPUS:33746074083

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

Keywords

Access to Document

Fingerprint

Cite this