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Thermodiffusion and Morphological Stability in Convectionless Crystal Growth Systems from Melts and Melt‐Solutions
Author(s) -
Rudolph P.,
Boeck T.,
Schmidt P.
Publication year - 1996
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170310218
Subject(s) - supercooling , crystal (programming language) , diffusion , crystal growth , phase (matter) , chemical physics , cadmium telluride photovoltaics , casting , materials science , thermodynamics , crystallization , semiconductor , chemistry , crystallography , nanotechnology , physics , metallurgy , optoelectronics , organic chemistry , computer science , programming language
Crystal growth experiments of multicomponent systems under microgravity require an exact analysis of the diffusion phenomena in the nutrient fluid phase. The contribution of the Soret effect to the transport and distribution of matter in a convectionless casting arrangement for shaped crystal growth and in THM melt‐solution zones have been investigated. Some semiconductor systems were analysed from experimental (Bi 1‐ x Sb x mixed crystals) and theoretical (PbTe, InP, GaAs, CdTe compounds) point of view. The criterion for constitutional supercooling was correspondingly modified. It has been distinguished between associated (AIVBVI, AIIBVI) and dissociated (AIII–BV) melt‐solutions, containing different species of diffusion (molecules or atoms, respectively).