Novel Fabrication Processing of Porous Al2O3/CaAl12O19 Membrane by Combining Emulsion, Cement Curing and Tape-Casting Methods

Abstract

This paper presented an innovative method for fabrication of a porous Al2O3/CaAl12O19 ceramic membrane by combining emulsion method, cement curing and tape-casting technologies. The ceramic membrane featured a smooth surface and a porous internal structure. By adjusting the oil–water volume ratio from 1:1 to 4:1, the porosity of the samples increases from 45.6 to 67.3%, density decreases from 2.07 to 1.32 g/cm3 and bending strength decreases from 64.3 ± 1.2 to 31.7 ± 0.6 MPa. More significantly, the membranes showed great gas permeability (1.2 × 107–2.3 × 107 Lm–2 h–1 bar–1), opening up a wide range of applications in the field of gas filtration processes.

Low-Cost Antibacterial Ceramic Water Filters for Decentralized Water Treatment: Advances and Practical Applications

“…Slip casting follows a procedure similar to that for conventional CWF preparation. Tape casting is a widely used technique for producing thin and smooth ceramic sheets, involving pouring a ceramic powder suspension into a reservoir and passing a ceramic tape under an adjustable casting knife. − Pressing is commonly employed in fundamental research for fabricating ceramic membranes, where a dry powder is pressed by using a machine and then heat-treated. In the extrusion method, a mixture of ceramic materials and additives is made pliable and forced through a shaped opening to determine the membrane’s structure and properties .…”