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J. Korean Ceram. Soc. > Volume 37(7); 2000 > Article
Journal of the Korean Ceramic Society 2000;37(7): 638.
저온 소성용 유리-알루미나 복합체에서 알루미나의 부피분율과 입자크기에 따른 소결 거동
박덕훈, 김봉철, 김정주, 박이순1
경북대학교 무기재료공학과
1경북대학교 고분자공학과
Effects of Volume Fraction & Particle Size of Alumina on Sintering Behaviors of the Glass-Alumina Composites for Low Firing Temperature
The sintering behaviors of the glass-alumina composites for low firing temperature were investigated as functiions of the volume fraction of alumina powder and the particle size with respect to porosity and pore shape. As the volume fraction of alumina powder was increased or the particle size of it was decreased, the sintering temperature of open pore-closing was raised. When the volume fractions of alumina which had 2.19$mutextrm{m}$ median diameter were increased with 20, 30, 40, and 50%, the sintering temperatures of open pore-closing were 425, 450, 475, and 500$^{circ}C$. And when the median particle size of alumina was diminished from 2.19$mutextrm{m}$ to 0.38$mutextrm{m}$, the sintering temperature of open pore-closing was increased from 450$^{circ}C$ to 475$^{circ}C$. Especially, the sintering temperature, which showed maximum density, was corresponded with the stage of open pore-closing and after achieving maximum density over heating resulted in dedensification of specimen, so called, over-firing behavior.
Key words: Glass-alumina composite, Volume fraction, Particle size, Viscous flow, Over-firing
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