Estimation of Thermal Expansion Coefficients of Rare-Earth Garnets in a Wide Temperature Range

Simple expressions were obtained for the thermal expansion coefficients of the rare-earth garnets, which allow to estimate their values in a wide temperature range in cases, when either the lattice unit cell parameters or the density of the material are known at 300 K. The expression giving the rela...

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Bibliographic Details
Published in:Journal of contemporary physics 2018-04, Vol.53 (2), p.152-156
Main Authors: Yeganyan, A. V., Kokanyan, E. P., Hovhannesyan, K. L., Butaeva, T. I., Hovsepyan, L. E.
Format: Article
Language:English
Subjects:
Garnets
Mathematical analysis
Particle and Nuclear Physics
Physics
Physics and Astronomy
Rare earth elements
Temperature
Thermal conductivity
Thermal expansion
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Summary:Simple expressions were obtained for the thermal expansion coefficients of the rare-earth garnets, which allow to estimate their values in a wide temperature range in cases, when either the lattice unit cell parameters or the density of the material are known at 300 K. The expression giving the relationship between the thermal expansion and thermal conductivity coefficients for the rare-earth garnets has also been obtained. It is shown that the calculated values obtained with the use of these expressions are in a good agreement with the available experimental data for the garnets of different composition.
ISSN:1068-3372
1934-9378
DOI:10.3103/S106833721802007X