Fabrication and Properties of Alumina Flat Sheet Membrane Surports

Abstract:

The porous ceramic support was realized at various temperature range from 1200°C~1300°C using α-Al₂O₃ as main material, carbon powder as pore-former, kaolin clay and titanium dioxide as sintering aids and polyvinyl alcohol (PVA) as adhesives. The microstructures of sintered body were significantly affected by the amount of pore-former and sintering temperature. The results indicated that the porosity dramatically increased and the pore radius increased from 2.9 μm to 3.2 μm as carbon powder addition increased from 3 wt.% to 12 wt.%. Correspondingly, their pure water flux depending on the pore structure parameters of the support increased from 1.37 to 4.53 m³.m^-2.h^-1.bar^-1. To prepare porous alumina support with 40% open porosity, carbon powder up to 10 wt.% is appropriate. Sintering experiments showed that the optimum sintering conditions are the sintering temperature of 1300 °C and 2 h holding time at this temperature.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 601-604
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.601
• Online since: June 2014
• Authors: De Xiang Liao, An Chao Geng, Peng Hao Su, Dao Lun Feng, Lin Lin Wang
• Keywords: Ceramic Membrane, Flat Sheet Membrane, Pore Size Distribution, Porosity

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