Thermal conductivity of rare-earth scandates in comparison to other oxidic substrate crystals
Thermal conductivity of rare-earth scandates in comparison to other oxidic substrate crystals
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DOI：
10.1016/j.jallcom.2017.12.172
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发表时间：
2018-03-25
影响因子：
6.2
通讯作者：
Klimm, Detlef
中科院分区：
文献类型：
--
作者：
Hidde, Julia;Guguschev, Christo;Klimm, Detlef
比较了三种相邻稀土渣DyScO3、TbScO3和GdScO3与La0.29Sr0.71Al0.65Ta0.35O3 （LSAT）和蓝宝石的高温热性能。为了计算导热系数，分别用差示扫描量热法和激光闪光法测量了热容和热扩散系数。在900 K以上，DyScO3和TbScO3的导热系数出现了非典型的上升，而GdScO3、LSAT和蓝宝石的导热系数则出现了预期的下降。(C) 2017 Elsevier B.V.版权所有
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.