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Phase transition studies of pure and flux‐grown barium titanate crystals
Author(s) -
Clarke R.
Publication year - 1976
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889876011436
Subject(s) - barium titanate , impurity , materials science , phase transition , ferroelectricity , barium fluoride , dielectric , crystal (programming language) , flux (metallurgy) , lattice (music) , classification of discontinuities , potassium fluoride , flux method , fluoride , condensed matter physics , crystallography , chemistry , inorganic chemistry , single crystal , metallurgy , physics , organic chemistry , mathematical analysis , mathematics , optoelectronics , computer science , nuclear physics , acoustics , programming language
The temperature dependence of the axial lattice spacings of a pure BaTiO 3 crystal, grown from a `top‐seeded' TiO 2 ‐rich melt, is presented for the four phases. This behaviour is compared with that of a crystal grown using a potassium fluoride flux. The lower ferroelectric paraelectric transition temperature and the smaller lattice parameter discontinuities exhibited by the latter crystal are attributed to the incorporation of impurities from the flux.