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The role of surface oxides and stabilising carboxylic acids of copper nanoparticles during low-temperature sintering

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Title: The role of surface oxides and stabilising carboxylic acids of copper nanoparticles during low-temperature sintering
Authors: Tokura, Rintaro Browse this author
Tsukamoto, Hiroki Browse this author
Tokunaga, Tomoharu Browse this author
Nguyen, Mai Thanh Browse this author
Yonezawa, Tetsu Browse this author →KAKEN DB
Issue Date: 21-Jun-2022
Publisher: Royal Society of Chemistry
Journal Title: Materials Advances
Volume: 3
Issue: 12
Start Page: 4802
End Page: 4812
Publisher DOI: 10.1039/d1ma01242h
Abstract: This article provides a detailed discussion of 1-hexanoic-acid-stabilised copper nanoparticles with an average diameter of similar to 80 nm prepared from cupric oxide micro-powders for low-temperature sintering applications. The obtained fine particles were dispersed in dipropylene glycol using a bead mill to obtain a stable paste containing 50 wt% copper. Sintering experiments at temperatures in the range of 120-250 degrees C were performed under a nitrogen or 3%H-2-N-2 gas flow. The lowest resistivity, approximately three times that of bulk copper, was obtained at 250 degrees C. These particles exhibited good conductivity upon sintering under nitrogen only. 1-Hexanoic acid contributed to the acceleration of sintering by removing the Cu64O oxide layer of the particles and activating the surface. The dispersed copper paste and the copper layer after sintering were observed using SEM.
Type: article
URI: http://hdl.handle.net/2115/85992
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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