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Journal of the Korean Ceramic Society 1994;31(6): 629. |
| Fe_2O_3-CaO-SiO_2$계 결정화 유리의 제조 및 특성(I) |
| 이용근, 최세영, 김경남1 |
연세대학교 세라믹공학과
1연세대학교 치과대학 |
| Characterization and Preparation of Glass-Ceramics in the System Fe_2O_3-CaO-SiO_2$ (I) |
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| ABSTRACT |
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The ferrimagnetic glass-ceramics in the system Fe2O3-CaO-SiO2 for hyperthermia were investigated. Glasses could be prepared up to the content of 40 wt% of Fe2O3 and below the weight ratio of 1.0 of CaO/SiO2. The maximum saturation magnetization and the maximum coercive force were 29.85 emu/g and 340.1 Oe respectively, for a glass 40Fe2O3.20CaO.40SiO2 composition heat-treated at 95$0^{circ}C$ for 8 hours. And for a glass 40Fe2O3.30CaO.30SiO2 composition the maximum saturation magnetization and the maximum coercive force were 18.47 emu/g and 374.4 Oe heat-treated at 1,00$0^{circ}C$ and 90$0^{circ}C$ for 8 hours respectively. The maximum hysteresis loss was 1,726.3 cal/g for a glass 40Fe2O3.20CaO.40SiO2 composition heat-treated at 95$0^{circ}C$ for 8 hours. It was found that the ferrimagnetic Fe2O3.CaO.SiO2 glass-ceramics was little injurious to human body as results of biocompatibility test and biotoxicity test. |
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