Direct synthesis of p-type bulk BiCuSeO oxyselenides by reactive spark plasma sintering and related thermoelectric properties

SCRIPTA MATERIALIA

卷:187

Article

Novitskii, Andrei¹  Guelou, Gabin^2,5  Voronin, Andrei¹  Mori, Takao^2,3  Khovaylo, Vladimir^1,4 

[1] Natl Univ Sci & Technol MISIS, Leninsky Prospekt 4, Moscow 119049, Russia

[2] Int Ctr Mat Nanoarchitecton WPI MANA, Natl Inst Mat Sci NIMS, Namiki 1-1, Tsukuba, Ibaraki 3050044, Japan

[3] Univ Tsukuba, Grad Sch Pure & Appl Sci, Tennoudai 1-1-1, Tsukuba, Ibaraki 3058671, Japan

[4] Natl Res South Ural State Univ, Lenin Prospekt 76, Chelyabinsk 454080, Russia

[5] Normandie Univ, UNICAEN, ENSICAEN, CRISMAT,CNRS, F-14000 Caen, France

关键词: BiCuSeO;    Oxyselenides;    Thermoelectric materials;    Reactive spark plasma sintering;   

DOI  :  10.1016/j.scriptamat.2020.06.043

来源: Elsevier

【 摘 要 】

Herein, we demonstrate that BiCuSeO compound can be formed in bulk directly from the raw materials through reactive spark plasma sintering (RSPS) followed by ball milling and a second short spark plasma sintering step. Compared to BiCuSeO samples obtained by a conventional solid-state reaction, the electrical transport properties of the RSPS bulk were moderately affected by the sintering technique, while the lattice thermal conductivity was almost unaffected, and the figure of merit zT attained a value at 773 K comparable to state-of-the-art BiCuSeO. The results indicate a new scalable method for the preparation of oxyselenides. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

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