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J. Korean Ceram. Soc. > Volume 31(8); 1994 > Article
Journal of the Korean Ceramic Society 1994;31(8): 823.
열간압축성형에 의한 저압사출성형 결합제 시스템의 결정
김상우, 이해원, 송휴섭, 김병호1
한국과학기술연구원 세라믹스연구부
1고려대학교 재료공학과
Application of Compression Molding to Determination of Binder System for Low Pressure Injection Molding
Dispersion condition of Si3N4 powder in molten wax was established by comparing relative viscosity of mixture with 20 vol% solids loading, while the evaluation of compression-molded sample was demonstrated as an effective method for developing a binder system for injection molding. The best dispersion of Si3N4 powder in molten wax was achieved when Si3N4 powder was treated with 5% stearic acid, and the critical powder volume fraction was determined to be about 0.51 from density measurement of compression-molded samples. Samples containing polar secondary binder showed markedly improved green strength, higher thermal expansion and increased wicking rate in the early stage.
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