Thermal conductivity of rare-earth scandates in comparison to other oxidic substrate crystals

JOURNAL OF ALLOYS AND COMPOUNDS

卷:738

Article

Hidde, Julia^1,2  Guguschev, Christo¹  Ganschow, Steffen¹  Klimm, Detlef^1,2 

[1] Leibniz Inst Kristallzuchtung, Max Born Str 2, D-12489 Berlin, Germany

[2] Humboldt Univ, Inst Chem, Brook Taylor Str 2, D-12489 Berlin, Germany

关键词: Oxide materials;    Anisotropy;    Heat capacity;    Heat conduction;    Calorimetry;    Thermal analysis;   

DOI  :  10.1016/j.jallcom.2017.12.172

来源: Elsevier

【 摘 要 】

High-temperature thermal properties of three neighboring rare-earth scandates DyScO3, TbScO3 and GdScO3 were compared to La0.29Sr0.71Al0.65Ta0.35O3 (LSAT) and sapphire. To calculate thermal conductivity, heat capacity and thermal diffusivity were measured by differential scanning calorimetry and laser flash technique, respectively. DyScO3 and TbScO3 showed an untypical rise in the thermal conductivity above 900 K, while for GdScO3, LSAT and sapphire the expected decrease at elevated temperatures could be observed. (C) 2017 Elsevier B.V. All rights reserved.

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