Top-down approach using supercritical carbon dioxide ball milling for producing sub-10 nm Bi_2 Te_3 grains

資料種別:
論文(リポジトリ)
責任表示:
Atwa, Mohamed ; Nakagawa, Tessui ; Yonamine, Akira ; Lloyd, David C. ; Schreiber, Makoto ; Miyazaki, Koji ; Takeuchi, Tsunehiro ; Okada, Yoshinori
言語:
英語
出版情報:
Japan Society of Applied Physics — 公益社団法人応用物理学会, 2020-05-20
著者名:
Atwa, Mohamed
Nakagawa, Tessui
Yonamine, Akira
Lloyd, David C.
Schreiber, Makoto
Miyazaki, Koji
Takeuchi, Tsunehiro
Okada, Yoshinori
続きを見る
掲載情報:
Applied Physics Express
ISSN:
1882-0778  CiNii Articles  Webcat Plus  JAIRO
1882-0786  CiNii Articles  Webcat Plus  JAIRO
巻:
13
通号:
067002-1
開始ページ:
067002-5
バージョン:
publisher
概要:
We compare Bi_2Te_3 powders prepared by conventional ball milling to powders milled in supercritical carbon dioxide (scCO_2). We demonstrate that scCO_2 milling overcomes size-reduction limitations reported for conventional milling. XRD and TEM reveal nanograins with smaller average sizes (< 10 nm) and narrower grain size distributions in the scCO_2 milled case. scCO_2 milling also preserves the crystallinity and shows less oxidation than conventional milling. This is the first report of Bi_2Te_3 with a sub-10 nm grain size whilst conserving high quality crystallinity, made using a top-down approach. Our study offers a route for developing unprecedentedly fine bulk nanostructured Bi_2Te_3-based thermoelectric materials. 続きを見る
URL:
http://hdl.handle.net/20.500.12000/47206
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