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J. Korean Ceram. Soc. > Volume 46(6); 2009 > Article
Journal of the Korean Ceramic Society 2009;46(6): 653.
doi: https://doi.org/10.4191/kcers.2009.46.6.653
Effect of Additives on Mechanical Properties of Alumina Bushing Fabricated by Gel-Casting
Kwang-Taek Hwang, Deock-Soo Cheong1
Korea Institute of Ceramic Engineering and Technology
1Materials Science & Engineering, Dankook University
ABSTRACT
Alumina bushing used for manufacturing glass fiber was fabricated by gel-casting which can fabricate complex forms. When solid loading is increased, density was increased and shrinkage and absorption were decreased. The sample loading with 57 vol% solid was optimum for alumina suspension, which showed the best physical properties. The cast sample was sintered at $1550{^{circ}C}$ for two hours with sintering additive, $Y_2O_3$. The result showed that the alumina bushing with $Y_2O_3$ sintering additive has a density of 98%, shrinkage of 11% and bending strength of 196 kg/$cm^2$.
Key words: Bushing, Alumina, Gel-casting, Additive, Solid loading
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