Low voltage varistor ceramics based on SnO2

TitleLow voltage varistor ceramics based on SnO2
Publication TypeJournal Article
Year of Publication2007
AuthorsDhage, SR, Ravi, V, Yang, OB
JournalBulletin of Materials Science
Volume30
Issue6
Pagination583-586
Date PublishedDEC
Type of ArticleArticle
ISSN0250-4707
KeywordsChemical synthesis, electronic materials, Microstructure, tin oxide, X-ray diffraction
Abstract

The nonlinear current (I)-voltage (V) characteristics of tin dioxide doped with either Nb2O5 and CoO or Sb2O3 and CoO show promising values of nonlinear coefficient (alpha) values (similar to 11) with low breakdown voltages (E-B, similar to 40 V mm(-1)). The pentavalent antimony or niobium acts as donor and increases the electronic conductivity. The crucial parameter for obtaining low breakdown voltage is the grain size, which depends upon sintering duration and temperature of these oxide ceramics.

DOI10.1007/s12034-007-0092-8
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)0.895
Divison category: 
Physical and Materials Chemistry