液中レーザ溶融法によるサブマイクロメートルサイズ酸化鉄球状粒子の生成と化学組成

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2015/09/01

タイトル(英語): Submicrometer-sized Spherical Iron Oxide Particles Fabricated by Pulsed Laser Melting in Liquid

著者名: 石川　善恵（産業技術総合研究所 ナノシステム研究部門），越崎　直人（北海道大学 大学院工学研究院 量子理工学部門），ピアテンコ　アレクサンダー（産業技術総合研究所 ナノシステム研究部門）

著者名(英語): Yoshie Ishikawa (Nanosystem Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST)), Naoto Koshizaki (Division of Quantum Science and Engineering, Graduate School of Engineering, Hokkaido University), Alexander Pyatenko (Nanosystem Research Institute (NRI), National Institute of Advanced Industrial Science and Technology (AIST))

キーワード: 液中レーザ溶融法，マグネタイト，有機溶媒，還元反応　　Pulsed laser melting in liquid，magnetite，organic solvent，reduction reaction

要約(英語): Submicrometer-sized spheres of iron oxide were obtained by laser irradiation of cuboidal Fe3O4 particles dispersed in ethanol, acetone, and toluene. Sphere formation condition and sphere size are explained based on a relationship between particle size and laser fluence required for solid-liquid phase transition of Fe3O4, which is calculated by equating the melting enthalpy and the optically absorbed energy derived from Mie theory. FeO was partially formed by laser irradiation at 200 mJ pulse-1 cm-2 in ethanol, acetone and toluene. The reduction reaction is not simply due to thermal decomposition of Fe3O4, but due to the reduction by chemical species generated from solvent surrounding Fe3O4 particles melted by laser irradiation. Ethanol was more reductive than the other two solvents; Fe is formed even at 200 mJ pulse-1 cm-2. This is probably due to chemical rectivity of produced iron oxides and chemical species transiently generated from solvent.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.135 No.9 （2015） 特集：サステナブル社会・先端応用へ向けたレーザプロセシング技術

本誌掲載ページ: 1066-1070 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/135/9/135_1066/_article/-char/ja/