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Thermal Expansion Coefficients in La3Ga5SiO14 and Ca3TaGa3Si2O14 Crystals
Version 1
: Received: 10 April 2023 / Approved: 11 April 2023 / Online: 11 April 2023 (03:38:49 CEST)
A peer-reviewed article of this Preprint also exists.
Roshchupkin, D.; Kovalev, D. Coefficients of Thermal Expansion in La3Ga5SiO14 and Ca3TaGa3Si2O14 Crystals. Materials 2023, 16, 4470. Roshchupkin, D.; Kovalev, D. Coefficients of Thermal Expansion in La3Ga5SiO14 and Ca3TaGa3Si2O14 Crystals. Materials 2023, 16, 4470.
Abstract
The ordered Ca3TaGa3Si2O14 and disordered La3Ga5SiO14 crystals of the lantangallium silicate family were grown by the Czochralski method. The independent coefficients of thermal expansion of crystals αc and αa were determined by X-ray powder diffraction based on the analysis of X-ray diffraction spectra measured in the temperature range of 25÷1000°C. It is shown that in the temperature range of 25÷800°C the thermal expansion coefficients are linear. At temperatures above 800°C there is a nonlinear character of the thermal expansion coefficients associated with a decrease in the Ga content in the crystal lattice of the lantangallium silicate family crystals.
Keywords
langasite; thermal expansion coefficients; X-ray powder diffraction; piezoelectric crystals; Czochralski method
Subject
Physical Sciences, Condensed Matter Physics
Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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