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Genesis of the (111) Twin in Barium Titanate
Author(s) -
Kraševec Viktor,
Drofenik Miha,
Kolar Drago
Publication year - 1990
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.1151-2916.1990.tb05125.x
Subject(s) - barium titanate , octahedron , eutectic system , nucleation , materials science , crystallography , mineralogy , metallurgy , crystal structure , chemistry , thermodynamics , ceramic , microstructure , physics
On the basis of the topotaxy between BaTiO 3 and Ba 6 Ti 17 O 40 found recently, a model of a nonconservative (111) twin in TiO 2 ‐rich BaTiO 3 was constructed. The model consists of several (001) layers of Ba 6 Ti 17 O 40 intergrown between (111) layers of BaTiO 3 , the core of the twin being a slightly modified double layer of Ba 6 Ti 17 O 40 containing face‐sharing octahedra. Using this model, anomalous grain growth below the eutectic temperature and preferential growth of (111) twins in a reducing atmosphere were explained, as well a nucleation of butterfly twins.