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Interface Kinetical Limitations in Closed‐Tube Chemical Vapour Transport (I)
Author(s) -
Paorici C.,
Pessina V.,
Zecchina L.
Publication year - 1986
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.2170210905
Subject(s) - thermal diffusivity , diffusion , thermodynamics , tube (container) , phase (matter) , vapor phase , process (computing) , chemistry , materials science , physics , organic chemistry , computer science , composite material , operating system
A semiempirical method is proposed, by which the role of kinetical constraints to the growth in closed tube chemical vapour transport can be evidenced. The method is based on the evaluation of the ratio (Φ) between the quantity D 0 SEwhich is related to the semiempirically‐determined average diffusivity of the gaseous species during the growth process, and the quantity D 0 MAX , which is related to the maximum average diffusivity of the gaseous species as is predicted, through the choice of a suitable diffusional model, by the equilibrium thermodynamics and diffusion properties of the vapour phase.