Characterisation of SnO2-CoO-MnO-Nb2O5 ceramics

Jiwei Fan; Huijun Zhao; Yanjun Xi; Yunchao Mu; Feng Tang; Robert Freer

doi:10.1016/j.jeurceramsoc.2009.06.007

Characterisation of SnO2-CoO-MnO-Nb2O5 ceramics

Jiwei Fan, Huijun Zhao, Yanjun Xi, Yunchao Mu, Feng Tang, Robert Freer

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

Abstract

Varistors based on SnO2 have attracted increasing interest in recent years. However, the combined effect of CoO-MnO on SnO2 ceramics is still unclear. In this study, the non-Ohmic behaviour of the 98.95 mol%SnO2-0.5 mol%CoO-0.5 mol%MnO-0.05 mol%Nb2O5 system, the microstructures and the influence of sintering temperature were investigated. The samples were prepared by the mixed oxide route, and were sintered at temperatures in the range 1250-1450 °C. SEM observation and EDS analysis revealed that the ceramics have a two-phase microstructure comprising SnO2 primary grains and a Mn, Co rich secondary phase of small particles. The sintered density of the samples increased with the increase in sintering temperature. The maximum non-linear coefficient (α = 10) was obtained at a sintering temperature of 1350 °C. © 2009 Elsevier Ltd. All rights reserved.

Original language	English
Pages (from-to)	545-548
Number of pages	3
Journal	Journal of the European Ceramic Society
Volume	30
Issue number	2
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2009.06.007
Publication status	Published - Jan 2010

Keywords

CoO-MnO doping
Microstructure
Non-linearity
Second phase
SnO2 varistor

Access to Document

10.1016/j.jeurceramsoc.2009.06.007

Cite this

@article{c18a064d92954170adc7793d2856247f,

title = "Characterisation of SnO2-CoO-MnO-Nb2O5 ceramics",

abstract = "Varistors based on SnO2 have attracted increasing interest in recent years. However, the combined effect of CoO-MnO on SnO2 ceramics is still unclear. In this study, the non-Ohmic behaviour of the 98.95 mol%SnO2-0.5 mol%CoO-0.5 mol%MnO-0.05 mol%Nb2O5 system, the microstructures and the influence of sintering temperature were investigated. The samples were prepared by the mixed oxide route, and were sintered at temperatures in the range 1250-1450 °C. SEM observation and EDS analysis revealed that the ceramics have a two-phase microstructure comprising SnO2 primary grains and a Mn, Co rich secondary phase of small particles. The sintered density of the samples increased with the increase in sintering temperature. The maximum non-linear coefficient (α = 10) was obtained at a sintering temperature of 1350 °C. {\textcopyright} 2009 Elsevier Ltd. All rights reserved.",

keywords = "CoO-MnO doping, Microstructure, Non-linearity, Second phase, SnO2 varistor",

author = "Jiwei Fan and Huijun Zhao and Yanjun Xi and Yunchao Mu and Feng Tang and Robert Freer",

year = "2010",

month = jan,

doi = "10.1016/j.jeurceramsoc.2009.06.007",

language = "English",

volume = "30",

pages = "545--548",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier BV",

number = "2",

}

TY - JOUR

T1 - Characterisation of SnO2-CoO-MnO-Nb2O5 ceramics

AU - Fan, Jiwei

AU - Zhao, Huijun

AU - Xi, Yanjun

AU - Mu, Yunchao

AU - Tang, Feng

AU - Freer, Robert

PY - 2010/1

Y1 - 2010/1

N2 - Varistors based on SnO2 have attracted increasing interest in recent years. However, the combined effect of CoO-MnO on SnO2 ceramics is still unclear. In this study, the non-Ohmic behaviour of the 98.95 mol%SnO2-0.5 mol%CoO-0.5 mol%MnO-0.05 mol%Nb2O5 system, the microstructures and the influence of sintering temperature were investigated. The samples were prepared by the mixed oxide route, and were sintered at temperatures in the range 1250-1450 °C. SEM observation and EDS analysis revealed that the ceramics have a two-phase microstructure comprising SnO2 primary grains and a Mn, Co rich secondary phase of small particles. The sintered density of the samples increased with the increase in sintering temperature. The maximum non-linear coefficient (α = 10) was obtained at a sintering temperature of 1350 °C. © 2009 Elsevier Ltd. All rights reserved.

AB - Varistors based on SnO2 have attracted increasing interest in recent years. However, the combined effect of CoO-MnO on SnO2 ceramics is still unclear. In this study, the non-Ohmic behaviour of the 98.95 mol%SnO2-0.5 mol%CoO-0.5 mol%MnO-0.05 mol%Nb2O5 system, the microstructures and the influence of sintering temperature were investigated. The samples were prepared by the mixed oxide route, and were sintered at temperatures in the range 1250-1450 °C. SEM observation and EDS analysis revealed that the ceramics have a two-phase microstructure comprising SnO2 primary grains and a Mn, Co rich secondary phase of small particles. The sintered density of the samples increased with the increase in sintering temperature. The maximum non-linear coefficient (α = 10) was obtained at a sintering temperature of 1350 °C. © 2009 Elsevier Ltd. All rights reserved.

KW - CoO-MnO doping

KW - Microstructure

KW - Non-linearity

KW - Second phase

KW - SnO2 varistor

U2 - 10.1016/j.jeurceramsoc.2009.06.007

DO - 10.1016/j.jeurceramsoc.2009.06.007

M3 - Article

SN - 0955-2219

VL - 30

SP - 545

EP - 548

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 2

ER -

Characterisation of SnO2-CoO-MnO-Nb2O5 ceramics

Abstract

Keywords

Access to Document

Fingerprint

Cite this