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Comparison of Ba(B 1‐x Al x ) 2 O 4 Single Crystals on their Diameters
Author(s) -
Miyazaki A.,
Kimura H.,
Jia X.,
Shimamura K.,
Fukuda T.
Publication year - 1999
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/(sici)1521-4079(199908)34:7<817::aid-crat817>3.0.co;2-s
Subject(s) - czochralski method , opacity , crystal (programming language) , supercooling , sizing , materials science , crystal growth , crystallography , optical transparency , mineralogy , optics , analytical chemistry (journal) , chemistry , optoelectronics , thermodynamics , chromatography , physics , programming language , organic chemistry , computer science
Small diameter crystals of Ba(B 1‐x Al x ) 2 O 4 were grown by Floating zone pulling down method and Micro‐pulling down method to be compared with large diameter crystals grown by Czochralski method. While the Czochralski grown crystal was opaque, the crystal transparency was actually improved with the decrease of crystal diameter, i.e., the decrease of constitutional supercooling. The reason was the increase of temperature gradient caused by down‐sizing of the crystal diameter deduced by down‐sizing of the growth furnace. The adequate diameter for transparent crystal was determined depending on the Al content.