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J. Korean Ceram. Soc. > Volume 45(9); 2008 > Article
Journal of the Korean Ceramic Society 2008;45(9): 537.
doi: https://doi.org/10.4191/kcers.2008.45.9.537
기공형성제 크기 비(ratio)가 다공질 지르코니아 세라믹스의 기공율과 강도에 미치는 영향
채수호, 김영욱, 송인혁1, 김해두1, 배지수2
서울시립대학교 신소재공학과
1재료연구소
2(주)영진세라믹스
Effect of Template Size Ratio on Porosity and Strength of Porous Zirconia Ceramics
Su-Ho Chae, Young-Wook Kim, In-Hyuek Song1, Hai-Doo Kim1, Ji-Soo Bae2
Department of Materials Science and Engineering, the University of Seoul
1Powder Materials Research Division, Korea Institute of Materials Science(KIMS)
2Young-Jin Ceramics Co., Ltd.
ABSTRACT
Effect of template size ratio on porosity and mechanical properties of porous zirconia ceramics were investigated using two different size (${sim}8{mu}m$ and ${sim}50{mu}m$ in diameter) of polymethyl methacrylate-coethylene glycol dimethacrylate (PMMA) microbeads as sacrificial templates. Porosity of the porous zirconia ceramics increased with decreasing the template size ratio ($8{mu}m: 50{mu}m$) whereas the compressive and flexural strengths of the porous zirconia ceramics increased with increasing the template size ratio. By controlling the template size ratio, sintering temperature and sintering time, it was possible to produce porous zirconia ceramics with porosities ranging from 57% to 69%. Typical flexural and compressive strength values of porous zirconia ceramics with ${sim}60%$ porosity were ${sim}37;MPa$ and ${sim}85;MPa$, respectively.
Key words: Porous ceramics, Zirconia, Template, Porosity
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