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Journal of the Korean Ceramic Society 1999;36(2): 167. |
| 이산화티탄 소결체의 수소환원 속도 |
| 석상일, 이오상, 이재도 |
| 한국화학연구소 화학소재연구부 4팀 |
| The Hydrogen Reduction Kinetics of the Sintered Titanium Dioxide |
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| ABSTRACT |
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Titanium dioxide bodies sintered at 130$0^{circ}C$ for 10 h under the oxygen flowing were reduced with hydrogen in 1200, 1250 and 130$0^{circ}C$ for 4~20 h. Reduction kinetics were evaluated by measuring a weight loss between before and after reduction, and the thickness of reduced layer, respectively. The reduction followed the parabolic rate law, indicating that the rate-determining process is diffusion. From the Arrhenius plots, the apparent activation energies for the reduction were obtained as 210$pm$10 kJ/mol. |
| Key words:
TiO$_2$, Magneli phase, Hydrogen reduction, Kinetics |
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