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

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掲載情報:

Applied Physics Express

ISSN:

1882-0778      
1882-0786      

巻:

13

通号:

067002-1

開始ページ:

067002-5

バージョン:

VoR

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.
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URL:

http://hdl.handle.net/20.500.12000/47206