Abstract 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.

中文翻译：

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通过反应放电等离子体烧结和相关热电特性直接合成 p 型块状 BiCuSeO 氧硒化物

摘要在此，我们证明了 BiCuSeO 化合物可以通过反应性放电等离子体烧结 (RSPS) 和第二个短放电等离子体烧结步骤直接从原材料大量形成。与通过常规固态反应获得的 BiCuSeO 样品相比，RSPS 块体的电传输性能受烧结技术的影响适中，而晶格热导率几乎不受影响，品质因数 zT 达到 773 K可与最先进的 BiCuSeO 相媲美。结果表明了一种新的可扩展的氧硒化物制备方法。