| 학회 |
한국재료학회 |
| 학술대회 |
2013년 가을 (11/06 ~ 11/08, 제주롯데호텔) |
| 권호 |
19권 2호 |
| 발표분야 |
C. 에너지/환경 재료(Energy and Environmental Materials) |
| 제목 |
Preparation and Characterizations of Porous Reaction Bonded Silicon Nitride Structures by Ice-Templating Method |
| 초록 |
Porous ceramics, due to their large surface area, high porosity, low thermal conductivity and high-temperature resistance, are widely used in various applications such as catalysis supports, gas distributors and filters such as DPF. For these purpose, it is important to have proper porosity controlling pore structure while maintaining mechanical and thermal properties. In this work, we have prepared the porous ceramic structures made of reaction bonded silicon nitride with hierarchical pore structures. Uni-directionally aligned porous channels, which are mostly filled with α-Si3N4 whiskers, were achieved by ice-templating method. The multi-layered lamellar structures of the walls are controllable by the processing conditions, such as solid concentration, freezing rate. We have investigated and characterized the influences of the conditions on the microstructures and the properties, porosity, pore size distribution. The compressive strength test and flow test was performed to determine the structural integrity and filterability. |
| 저자 |
Dong Seok Kim1, Jae-Woong Ko2, Do Kyung Kim3
|
| 소속 |
1Department of Materials Science and Engineering, 2KAIST, 3Engineering Ceramics Group |
| 키워드 |
Ice-templating; Porous ceramics; Reaction bonded silicon nitride
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| E-Mail |
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