| 기공형성제 크기와 함량이 다공질 지르코니아 세라믹스의 가공율과 강도에 미치는 영향 |
| 채수호, 김영욱, 송인혁1, 김해두1, 배지수2 |
서울시립대학교 신소재공학과
1재료연구소(KIMS)
2(주)영진세라믹스 |
| Effects of Template Size and Content on Porosity and Strength of Macroporous 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
2Young-Jin Ceramics Co., Ltd |
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| ABSTRACT |
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Using zirconia and poly (methyl methacrylate-coethylene glycol dimethacrylate) (PMMA) microbeads, macroporous zirconia ceramics were fabricated by a simple pressing method. Effects of template size and content on microstructure, porosity, and flexural and compressive strengths were investigated in the processing of the macroporous zirconia ceramics. Three different sizes of microbeads (8, 20, and $50{mu}m$) were used as a template for fabricating the macroporous ceramics. The porosity increased with increasing the template size at the same template content. The flexural and compressive strengths were primarily influenced by the porosity rather than the template size. However, the strengths increased with decreasing the template size at the same porosity. By controlling the template size and content, it was possible to produce macroporous zirconia ceramics with porosities ranging from 58% to 75%. Typical flexural and compressive strength values at 60% porosity were ${sim}30;MPa$ and ${sim}75;MPa$, respectively. |
| Key words:
Porous ceramics, Zirconia, Template, Porosity, Strength |
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