B., Kurniawan and Supiyanto, Supiyanto and I., Sugihartono and Sunarno, Sunarno and J., Jamaludin and L., Hermanto and S., Soejati and S., Soeyati and Nukman, Nukman and S, Poertadji (2003) Magnetic Properties Study of Coal Oxidation Process. Materials Science Forum (Advanced Materials Processing II), 437-43. pp. 493-498.
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Abstract
Magnetic properties of coal samples were studied by using electron spin resonance (ESR) spectrometer. The spectra linewidth were determined from ESR measurement results. We observerd that these paramaters depend on heating temperature. Spectra of all samples showed both braoadening and narrowing phenomena. It is indicated that the change of spectra linewidth is due to dipolar interactions of unpaired electrons and the unresolved hyperfine structure of interactions of unpaired electrons wih neighbouring protons. Keywords: Coal, ESR, Free radical, linewidth.
| Item Type: | Article |
|---|---|
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ1-1570 Mechanical engineering and machinery |
| Divisions: | 03-Faculty of Engineering > 21101-Mechanical Engineering (S2) |
| Depositing User: | Prof.Dr.Ir Nukman Nukman |
| Date Deposited: | 12 Sep 2019 07:54 |
| Last Modified: | 12 Sep 2019 07:54 |
| URI: | http://repository.unsri.ac.id/id/eprint/1711 |
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