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- Title
Abnormal Grain Growth in Barium Titanate Doped with Alumina.
- Authors
Fisher, John G.; Si-Young Choi; Kang, Suk-Joong L.
- Abstract
The effect of additions of ≤1 mol% Al2O3 on abnormal grain growth in BaTiO3 sintered for periods of ≤60 min at 1350°C has been studied. Addition of ≤0.2 mol% Al2O3 caused an increase in the nucleation and growth rates of abnormal grains, with further additions causing a decrease. This behavior is explained by interface-controlled growth. Dopant adsorption reduces both the edge free energy and the step velocity of a grain, causing the nucleation and growth rates of abnormal grains to increase, pass through a maximum, and then decrease with increasing dopant concentration.
- Subjects
BARIUM compounds; ALUMINUM oxide; NUCLEATION; ADSORPTION (Chemistry); SURFACE chemistry
- Publication
Journal of the American Ceramic Society, 2006, Vol 89, Issue 7, p2206
- ISSN
0002-7820
- Publication type
Article
- DOI
10.1111/j.1551-2916.2006.00973.x