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http://dx.doi.org/10.4191/KCERS.2002.39.10.919

Fabrication of Double-layered Porous Materials  

Yun, Jung-Yeul (Ceramic Materials Group, Korea Institute of Machinery and Materials)
Kim, Hai-Doo (Ceramic Materials Group, Korea Institute of Machinery and Materials)
Park, Chun-Hong (Machine Tools Group, Korea Institute of Machinery and Materials)
Publication Information
Journal of the Korean Ceramic Society / v.39, no.10, 2002 , pp. 919-927 More about this Journal
Abstract
In order to fabricate double-layered porous materials powders of different particle sizes were pressed stepwise. Ford＇s equation which predicts the fired density with the change in pressed density was employed in order to adjust the difference in sintering shrinkage of the green body with double-layered porous structure. Double-layered porous materials were characterized by investigating microstructures and permeability. SEM micrographs showed the distinct difference in pore sizes of double-layered porous material. Permeability of single-layered porous material increased by increasing the starting particle sizes and porosity as well. Permeability of the double-layered porous material depends largely on the layer of small pore diameter.
Keywords
Double-layered porous materials; Permeability; Shrinkage; Pore size;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 S. Togo, M. Okano and Y. Aldyama, 'Experimental Study on Extemally Pressurized Porous Gas Bearings,' Lubrication, 17 [6] 360-68 (1972)
2 S. Togo, Guidebook ofAir Bearing Design, Kyouritsu Pub Ltd. Co., 2002
3 T. Iwato and S. Yoshomoto, 'Static and Dynamic Characteristics of Circular Aerostatic Porous Thrust Bearings,' J. of JSME, series C, 62 [593] 276-83 (1996)
4 W. F. Ford, 'The Effect of Initial Density on Fired Density,' Trans. Brit. Ceram. Soc., 75, XV (1976)
5 H. D. Kim and W, F. Ford, 'The Eftect of Pressed Density on Fired Density of Alumina Compacts,' J. of the Kor Ceram. Soc., 19 [2] 115 (1982)
6 N. Gupta, 'Determining the Pore Structure of Individual Layers of Multilayered Ceramic Composites,' Ceram. Industry, 24 (2001)
7 International Standard ISO 4003-1977 (E)
8 A. W. Paul and C. Orr, 'Analytical Methods in Fine Particle Technology,' pp.155-91, Micromehtics, USA, 1997
9 International Standard ISO 4022-1977 (E)