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BiCuSeO as state-of-the-art thermoelectric materials for energy conversion:from thin films to bulks

Rare Metals 2018年第4期37卷 259-273页

作者： Rui Liu Xing Tan Yao-Chun Liu Guang-Kun Ren Jin-Le Lan Zhi-Fang Zhou Ce-Wen Nan Yuan-Hua Lin State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical Technology

BiCuSeO-based thermoelectric material has attracted great attention as state-of-the-art thermoelectric materials since it was first reported in 2010. In this review, we update the studies on the BiCuSeO thin films first. Then, we focus on the most recent progress of multiple approaches that enhance the thermoelectric performance including advanced synthesized technologies, notable mechanisms for higher power factor （optimizing carrier concentration, carrier mobility, Seebeck coefficient） and doping effects predicted by calculation. And finally, aiming at further enhancing the performance of these materials and ultimately commercial application, we give a brief discussion on the urgent issues to which should be paid close attention.

关键词： BiCuSeO State-of-the-art thermoelectricmaterials Thin films bulks

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Large Ti_3SiC_2 bulks Fabricated by Infiltration Method

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稀有金属材料与工程 2011年第S3期40卷 372-375页

作者： Shan Di, Yan Guo, Zhou Lian, Li Chengshan, Wang Qingyang, Xiong Xiaomei Northwest Institute for Nonferrous Metal Research, Xi’an 710016, China NW Inst Nonferrous Met Res Superconducting Mat Ctr Xian 710016 Peoples R China

T3SiC2 bulks have been synthesized by infiltrating Si liquid into porous precursor pellets composed of solid Ti and C powders. Silicon pellets were placed at the bottom of the precursor pellets as the liquid source. The starting compositions can be represented by the formula 3Ti + 2C + xSi, where x = 1.0, 1.2, 1.4 and 1.6, respectively. The phase formation and microstructure of the bulks were investigated by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results demonstrated that the Ti/C precursor pellet could only react with Si completely when the x value is 1.6. Large, a purity of above 95wt% Ti3SiC2 bulk of up to 50 mm in diameter was obtained by this method.

关键词： infiltration method Ti3SiC2 bulks Si content 50 mm in diameter

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