Premium
Investigation of Twin Lamellae in BaTiO 3 Ceramics
Author(s) -
OPPOLZER H.,
SCHMELZ H.
Publication year - 1983
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.1151-2916.1983.tb10078.x
Subject(s) - crystallite , barium titanate , materials science , eutectic system , microstructure , ceramic , crystallography , diffraction , macle , mineralogy , grain growth , composite material , crystal twinning , optics , chemistry , metallurgy , physics
The microstructure of many electroceramic components based on barium titanate is dominated by anomalous grain growth. At firing temperatures below the eutectic temperature nearly all large crystallites were found to contain lamellae. The crys‐tallographic orientation of these lamellae was studied by TEM. By combining image and diffraction information it could be directly shown that the lamellae lie on (111) planes and represent twins, which are ∼0.5 μm thick. The relevance of twin formation for the mechanism of anomalous grain growth is briefly discussed.