Up-scaled solid state reaction for synthesis of doped Mg₂Si

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• 作者：Gwansik Kim^a ; Hwijong Lee^a ; Jeongmin Kim^a ; Jong Wook Roh^a ; Inwoong Lyo^b ; Byung-Wook Kim^b ; Kyu Hyoung Lee^c ; ^{khlee2014@kangwon.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Wooyoung Lee^a ; ^{wooyoung@yonsei.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Solid state reaction ; Mg2Si ; Hot pressing ; Spark plasma sintering ; Reproducibility
• 刊名：Scripta Materialia
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：128
• 期：Complete
• 页码：53-56
• 全文大小：751 K

文摘

Herein, we reported a synthesis technique based on the up-scaled solid state reaction for Al and Bi co-doped Mg₂Si polycrystalline bulks and investigated their thermoelectric transport properties. The powders (~ 1 kg/batch) were synthesized for mass production by using the solid state reaction, and the polycrystalline bulks were consolidated with a diameter of 25 mm and thickness of 3 mm using hot pressing and spark plasma sintering techniques. Both the hot pressed and the spark plasma sintered bulks showed good reproducibility and positional uniformity of the thermoelectric properties and the highest ZT value of 0.98 was obtained at 873 K.