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Formation and characterization of carbon micro-spheres doped with boron and nitrogen

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Title: Formation and characterization of carbon micro-spheres doped with boron and nitrogen
Authors: Konno, Hidetaka Browse this author
Matsuura, Ryoko Browse this author
Kiyono, Hajime Browse this author
Sudoh, Akihiro Browse this author
Habazaki, Hiroki Browse this author →KAKEN DB
Inagaki, Michio Browse this author
Keywords: Carbon sphere
Carbon composites
Chelate resin
Mechanical properties
Oxidation resistance
Issue Date: 1-Sep-2005
Publisher: 炭素材料学会
Journal Title: 炭素
Journal Title(alt): Tanso
Volume: 2005
Issue: 219
Start Page: 221
End Page: 225
Publisher DOI: 10.7209/tanso.2005.221
Abstract: Carbon micro-spheres doped with boron and nitrogen have been made from a chelate resin, in which N-methyl glucamate functional groups form ester with borate ions. Carbon spheres formed by heating at 1000-1600°C for 1h in argon were 140-340μm in diameter and the central ca. 1/3 of sphere was hollow. They contained 4.4-4.8mass% of boron, and B/C and N/C mole ratios of the sphere surface increased markedly with raising heat treatment temperature (HTT). Most of boron and nitrogen atoms in the surface layer of 1600°C product were in the form of >B-N< bonds. Hardness and elastic modulus including Poisson's ratio were highest for the spheres produced at 1000°C, 1.24GPa and 18.9GPa, respectively, and decreased with raising HTT. Generally, oxidation resistance of spheres in pure oxygen increased with raising HTT, which may be owing to the increased amounts of surface >B-N< bonds.
Rights: 著作権は炭素材料学会にある。利用は著作権の範囲内に限られる
Type: article
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)

Submitter: 幅崎 浩樹

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