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Formation and characterization of carbon micro-spheres doped with boron and nitrogen
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 |
URI: | http://hdl.handle.net/2115/72921 |
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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Submitter: 幅崎 浩樹
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