Thermal conductivity of LiKSO sub(4) near its high-temperature phase transition

The thermal conductivity of LiKSO sub(4) ferroelastic crystals was measured along the three principal crystallographic axes in the vicinity of its high-temperature phase transition at 705 K. The data showed an anomalous behavior in the temperature dependence of the thermal conductivity in the transi...

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Bibliographic Details
Published in:Journal of materials science 1988-01, Vol.23 (3), p.998-1001
Main Authors: Okaz, A M, Mahmoud, S M, Kassem, M E
Format: Article
Language:English
Online Access:Get full text
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Summary:The thermal conductivity of LiKSO sub(4) ferroelastic crystals was measured along the three principal crystallographic axes in the vicinity of its high-temperature phase transition at 705 K. The data showed an anomalous behavior in the temperature dependence of the thermal conductivity in the transition region of width about 25 K. The anomaly in the phonon contribution to the conductivity was referred to the freezing-in of either optic and/or acoustic modes of lattice vibrations in the near vicinity of the phase transition. The results are discussed in terms of the scattering mechanisms of energy carriers.
ISSN:0022-2461