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J. Korean Ceram. Soc. > Volume 30(9); 1993 > Article
Journal of the Korean Ceramic Society 1993;30(9): 747.
고Alumina질 다공성 세라믹스의 내열충격성 및 내Slag성 (기공크기에 따른)
김병훈, 나용한
전남대학교 무기재료공학과
Thermal Spalling and Resistance to Slag Attack in Porous High Alumina Ceramic (According to Pore Size)
ABSTRACT
The investigation was carried out to study the behaviors of the pore size and porosity, the mechanical strength, the resistance to thermal spallings and slag attacks according to particle sizes of starting raw materials in porous high Alumina ceramics. This porous ceramics have been used in processing of the clean steel by the blowing of the inert gas. The required properties in the practice are the suitable pores size, the sharp pores distribution for a uniform blowing of the gas, the strong corrosion resistance to slags and molten metals and the resistance to thermal spalling. The optimized properties in porous high alumina ceramics of the specimen No. 3 was found to be the very low slag intrusion and the superior resistance to thermal spalling because of the suitable pore size of 2.5${mu}{textrm}{m}$, the porosity of 30% and the high sinterability.
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