Preparation of Pyrolytc Magnetic Carbon under Magnetic Field
| Autor: | Kenji Kamishima, Nobuyuki Hiratsuka, Koichi Kakizaki, Tadashi Takamasu, Yuki Sato, Takashi Tokue, Daisuke Miyata, Yasutaka Imanaka |
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| Rok vydání: | 2009 |
| Předmět: |
Diffraction
Materials science Mechanical Engineering Metals and Alloys Analytical chemistry Industrial and Manufacturing Engineering Synchrotron law.invention Magnetic field Magnetic circuit Condensed Matter::Materials Science Magnetization Ferromagnetism law Materials Chemistry Pyrolytic carbon Pyrolysis |
| Zdroj: | Journal of the Japan Society of Powder and Powder Metallurgy. 56:456-460 |
| ISSN: | 1880-9014 0532-8799 |
| DOI: | 10.2497/jjspm.56.456 |
| Popis: | We have prepared pyrolytic carbon samples from triethylamine and investigated their yields and magnetic properties. Ferromagnetic samples were obtained from the pyrolysis products even at room temperature. The yield of the ferromagnetic sample was increased by setting a magnetic circuit on the pyrolysis chamber. The magnetic field seemed to affect the triethylamine vapor and then increased the yield and the magnetization. Also, the synchrotron X-ray diffraction experiments were performed for these pyrolytic carbon samples. Diffraction peaks of iron or iron oxides were not observed for the ferromagnetic samples, whereas the major diffraction peaks of the intermediate graphite-diamond (IGD) structure were observed for the ferromagnetic samples. The best magnetization sample also showed the diffraction peaks of the diamond-like-carbon structure. Therefore, the magnetic field may help to form a three-dimentional ferromagnetic structure in pyrolytic carbon. |
| Databáze: | OpenAIRE |
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