The primary aim pursued by the preparation of the separation membrane is to make the membrane thinner as well as have no defects. The field-flow fractionation deposition is a new molding technology which can overcome the traditional disadvantages, such as multi-preparation, to the preparation of a great area of the separation membrane with no defects. Therefore the main ingredients which influence the appearance and performance of titanium membrane layers are investigated by a scanning electricity mirror (SEM) as well as a porous material testing instrument: powder performance prepared and confected; selection of supporting body; sintering system such as temperature and time. It is shown that the membrane thickness can be controlled at 50μm or so.

The porous plate is the key part for distributing gas in the fluidized bed, which is subjected pressure, tension and shear from flowing gas and material during work. The porous plate is required to have good mechanical properties. The Monel porous plate was prepared by the powder metallurgy process in this paper. Meanwhile, in order to obtain the status of compressive resistance and shear, the compressive property and the shear property were studied. The results showed that the compressive resistance yield strength was 143MPa and elastic modulus was 18.1GPa at the edge of porous plate. In the central part, the compressive resistance yield strength was 67 MPa, elastic modulus was 8.2GPa and elastic strain range was 3 %.The minimum shear strength was 116 MPa in edge and 87 MPa in the central.