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Journal of the Korean Ceramic Society 1992;29(6): 471. |
| $Al_2(SO_4)_3.18H_2O$로부터 AlN 분말의 합성: II. 탈산화 효과 |
| 송태호, 이홍림 |
| 연세대학교 세라믹공학과 |
| Synthesis of AlN Powder from $Al_2(SO_4)_3.18H_2O$: II. Deoxidation Effect |
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| ABSTRACT |
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AlN powder was synthesized by carbothermal reduction and nitridation using Al2(SO4)3.18H2O as the starting material. The synthesized AlN powder was fine but contained oxygen. Therefore carbonaceous material (carbon black or phenol novolac) was added teogether with the sintering aids (CaO, CaF2, CaCl2, Y2O3 and YF3). It was found that pressureless sintering at 1700~180$0^{circ}C$ after deoxidation at 150$0^{circ}C$ suppressed the formation of second phase (27R) and reduced the contents of lattice oxygen within AlN ceramics. |
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