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Control of Liquid‐Phase‐Enhanced Discontinuous Grain Growth in Barium Titanate
Author(s) -
HENNINGS DETLEV F. K.,
JANSSEN ROLF,
REYNEN PIET J. L.
Publication year - 1987
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.1151-2916.1987.tb04847.x
Subject(s) - barium titanate , materials science , grain growth , eutectic system , grain size , ceramic , particle size distribution , phase (matter) , liquid phase , titanate , abnormal grain growth , chemical engineering , mineralogy , metallurgy , microstructure , particle size , chemistry , thermodynamics , physics , organic chemistry , engineering
Barium titanate shows discontinuous grain growth in the presence of small amounts of the liquid eutectic Ba 6 Ti 17 O 40 ‐BaTiO 3 at T > 1312°C. The exaggerated grain growth in the presence of the liquid phase can be explained in terms of a solution‐segregation process. The grain size distribution of sintered BaTiO 3 ceramics and the average grain size are strongly modified by addition of “seed grains” to BaTiO 3 powder. The addition of seed grains seems to be a general method of controlling the discontinuous grain growth of ceramics.