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Effect of Grain Size on Diffusion‐Induced Grain‐Boundary Migration in Ba(Zn 1/3 Nb 2/3 )O 3 Ceramics
Author(s) -
Park JongKeuk,
Kim DohYeon
Publication year - 1996
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1996.tb08604.x
Subject(s) - materials science , grain size , ceramic , grain boundary , diffusion , grain boundary diffusion coefficient , mineralogy , composite material , microstructure , chemistry , thermodynamics , physics
Diffusion‐induced grain‐boundary migration (DIGM) in Ba(Zn 1/3 Nb 2/3 )O 3 (BZN) ceramics was investigated with small (3.0 μm) and large (31. 4 μm) grain size specimens. The specimens were embedded in Nb 2 O 5 or ZnO powders and then heat‐treated at 1250° and 1310°C, respectively. The grain boundaries of the small grain size specimens were immobile, while those of the large grain size specimens migrated away from their centers of curvature. From the observed difference in migration behavior depending on grain size, the magnitude of the driving force for the DIGM was estimated.