Paper Title:
Grain Growth Kinetics of Cobalt-Doped SnO2 by Varying Nb2O5 Content
  Abstract

SnO2 ceramics were co-doped with the aliovalent ions of CoO and Nb2O5 and the grain growth behavior of the SnO2 was investigated. When only CoO was doped, the grain growth exponent of SnO2 was 3. As the amount of Nb2O5 increased, the exponent changed from 3 to 2 when 0.505 mol% of Nb2O5 was added. The further addition of Nb2O5 changed the exponent from 2 to 3. When Nb2O5 content was 0.505 mol%, of which the grain growth exponent was 2, it is believed that an iso-electric point is formed without grain boundary segregation, since the respective space charges, generated by Nb5+ and Co3+ might compensate each other.

  Info
Periodical
Materials Science Forum (Volumes 534-536)
Edited by
Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim
Pages
529-532
DOI
10.4028/www.scientific.net/MSF.534-536.529
Citation
D. G. Chang, J. H. Lee, J. J. Kim, "Grain Growth Kinetics of Cobalt-Doped SnO2 by Varying Nb2O5 Content ", Materials Science Forum, Vols. 534-536, pp. 529-532, 2007
Online since
January 2007
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$32.00
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