放电等离子烧结
材料科学
塞贝克系数
热电效应
复合数
烧结
电阻率和电导率
等离子体
热导率
复合材料
分析化学(期刊)
热力学
化学
物理
色谱法
量子力学
电气工程
工程类
作者
A.B. Ivanova,Aleksandra Khanina,Margarita Golikova,Efim Argunov,Andrei Novitskii,Takao Mori,Vladimir Khovaylo
标识
DOI:10.1016/j.matlet.2023.135746
摘要
We report on a study of bulk SiGe-MnTe composites obtained via spark plasma sintering of mixed powders composed of SiGe that was fabricated by mechanical alloying and MnTe prepared via solid-state reaction. The presence of MnTe in the SiGe matrix led to an increase in the electrical conductivity by ∼ 50 % and a decrease in the lattice thermal conductivity of the samples by ∼ 28 %, while the Seebeck coefficient was reduced from 252 μV K−1 to 197 μV K−1 at 1000 K. As a result, the peak zT of 0.75 was obtained for pristine Si80Ge20B2, and 0.8 for Si80Ge20B2 + 4 wt% MnTe at 1000 K.
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