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Effect of Crucible Diameter and Sealing Pressure on Growth Features of As 2 Se 3 Single Crystals
Author(s) -
Kothiyal G. P.,
Ghosh B.
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.2170210904
Subject(s) - crucible (geodemography) , whiskers , nucleation , torr , materials science , analytical chemistry (journal) , micro pulling down , growth rate , ambient pressure , partial pressure , crystal growth , tube (container) , mineralogy , range (aeronautics) , crystal (programming language) , chemistry , crystallography , composite material , thermodynamics , oxygen , chromatography , computational chemistry , physics , geometry , organic chemistry , mathematics , computer science , programming language
Crystals of arsenic triselenide were grown in tubes of diameter varying from 14 to 25 mm sealed under partial pressure of Ar in the range 60–660 Torr. The temperature range of the growth zone was independent of crucible diameter and ambient pressure under otherwise identical conditions. A particular range of ambient pressure was conducive for the growth of good quality crystals and whiskers, growth rate increasing with diameter of tube. Transition to growth stage from nucleation stage was not spontaneous in tubes of diameter ≦ 16 mm but required a temperature cycling. Results are explained qualitatively.