Ceramics-Silikáty 35, (4) 335 - 340 (1991) |
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PREPARATION OF ALUMINA MEMBRANES FOR MICROFILTRATION
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Fellner Pavel 1, Haviar Miroslav 2, Koman Marián 1,
Chovancová Marta 1
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1 Department of Inorganic Technology, Slovak Technical University, Radlinského 9, 812 37 Bratislava, Czechoslovakia
2 Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta, 842 36 Bratislava, Czechoslovakia
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Porous α-Al₂O₃ ceramics for microfiltration membranes can he obtained by calcination of Al(OH)₃ in the temperature interval 1150 – 1400 °C followed by milling and sintering. Calcination at 1150 °C provides θ-Al₂O₃ whose sintering leads to approx. 8 % higher porosities comparing to α-Al₂O₃. Milling of calcined powder has significant influence on decreasing of the mean pore size which is accompanied by the 20-25 % decreasing of porosity. |
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