Abstract: The heat capacity Cp, thermal diffusivity vT , and lattice thermal conductivity jlattof ceramic solid solutions of sesquisulfides Gd 3-xV Gd,xS 4 (0 < x < 0.33) in thetemperature range 300-700 K has been studied. Changing the real structure,namely the concentrations of vacancies (NV ) and deformation (NDc) centers ofpolycrystals, significantly decreases jlatt . A deviation of composition from the sto-ichiometry 2:3 is accompanied by an increase in the specific area of the crystalliteboundaries per unit volume, and, hence, the concentration of deformation centersD C increases. This observation was confirmed by examining the short-range orderdisturbance of the lattice and symmetry environment of the Gd 3+ and S 2 envi-ronment by Raman spectroscopy and the magnetic susceptibility Faraday method.Therefore the thermal diffusivity of gadolinium sesquisulfide is reduced becauseof the mean free path of phonons decrease. As a result, the thermal conductivityof the polycrystalline samples is reduced by 10%.

Cite: Bakovets V.V. , Sotnikov A.V. , Agazhanov A.S. , Stankus S.V. , Korotaev E.V. , Pishchur D.P. , Shkatulov A.I.
Some features of thermophysical properties of γ-Gd2S3 ceramics based on real structure
Journal of the American Ceramic Society. 2018. V.101. N10. P.4397-4811. DOI: 10.1111/jace.15735 WOS Scopus OpenAlex

Identifiers:

Web of science:	WOS:000440554000043
Scopus:	2-s2.0-85047409058
OpenAlex:	W2801062441

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DB	Citing
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Scopus	9
Web of science	8

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