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http://dx.doi.org/10.4191/KCERS.2004.41.7.513

Fabrication of Porous Al2O3 Ceramics Using Thermoplastic Polymer  

이상진 (한국기계연구원 세라믹재료그룹)
김해두 (한국기계연구원 세라믹재료그룹)
Publication Information
Journal of the Korean Ceramic Society / v.41, no.7, 2004 , pp. 513-517 More about this Journal
Abstract
Porous alumina ceramics with aligned plate-shaped pores were fabricated by using thermoplastic microsphere in order to show the anisotropy in thermal conductivity. The mixed powder of alumina and microsphere was pressed under 15 MPa till 20$0^{\circ}C$ to deform polymer into platelet-shape and sintered at 1,00$0^{\circ}C$ for 1 h. The sintered specimen with 10 wt% microsphere has 45.3% porosity and the bending strength of 44 MPa. The microstructural investigation confirmed the pore structure of platelet-shape, the thermal conductivities for vertical and parallel directions are 3.803 W/mK and 7.818 W/mK, respectively, the ratio between two directions exceeds 2.
Keywords
Porous alumina; Plate-shaped pore; Anisotropy in thermal conductivity; Microsphere;
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