Grain growth kinetic in xCoO-6 wt.% Bi2O3-(94-x) ZnO (x = 0, 2, 4) ceramic system

Gunay V., Gelecek-Sulan O., Ozkan O.

CERAMICS INTERNATIONAL, vol.30, no.1, pp.105-110, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 30 Issue: 1
  • Publication Date: 2004
  • Doi Number: 10.1016/s0272-8842(03)00071-3
  • Journal Name: CERAMICS INTERNATIONAL
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.105-110
  • Istanbul University Affiliated: No

Abstract

The grain growth kinetics in the 0, 2, 4 wt.% CoO added ZnO-6 wt.% Bi2O3 system was studied using the simplified phenomenological grain growth kinetics equation G(n) = K.t.exp(-Q/RT) together with the physical properties of the sintered samples. The grain growth exponent value (n) and the apparent activation energy for the ZnO-6 wt.% Bi2O3 system was found to be 5.2 and similar to200 kJ/mol respectively. The addition of the CoO to the ZnO-6 wt.% Bi2O3 system had no effect in the grain growth. At 0% CoO addition the apparent activation energy was calculated as 204 kJ/mol and with 4 wt.% CoO addition it was calculated as 203 kJ/mol. (C) 2003 Elsevier Ltd and Techna S.r.l. All rights reserved.