Standard measures of thermal expansion made of monocrystalline aluminum oxide for a broad range of temperatures

Standard measures of linear thermal expansion made of monocrystalline aluminum oxide have been developed. The measures have a 59° orientation relative to the trigonal axis of the crystalline lattice. The raw material for making the measures is obtained by the Stepanov's method of growing shaped...

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Bibliographic Details
Published in:Measurement techniques 1999-08, Vol.42 (8), p.776-781
Main Authors: Kompan, T. A., Korenev, A. S., Lukin, A. Ya, Antonov, P. I., Krymov, V. M., Moskalev, A. V.
Format: Article
Language:English
Subjects:
Aluminum oxide
Crystal structure
Dilatometers
Measurement techniques
Melts
Orientation
Raw materials
Studies
Temperature effects
Thermal expansion
Transducers
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Summary:Standard measures of linear thermal expansion made of monocrystalline aluminum oxide have been developed. The measures have a 59° orientation relative to the trigonal axis of the crystalline lattice. The raw material for making the measures is obtained by the Stepanov's method of growing shaped monocrystalline semifinished products with a highly accurate crystallographic orientation from a melt. The parameters of the measures are optimized for testing high-temperature relative dilatometers with transducers made of polycrystalline corundum. The coefficient of linear expansion of the new measures was checked in the range 90-1800 K and exact values of the coefficient were obtained for a broad range of temperatures.[PUBLICATION ABSTRACT]
ISSN:0543-1972
1573-8906
DOI:10.1007/BF02504359