Preparation And Function Token Of Ceramic Fibers Composite Microporous Membrane

The ceramics fiber composite microporous membrane is composed of microporous support and ceramics fiber composite membrane layer,which developped gradually by an abroad for meet the needs of high-temperature gas cleanup in 1980s .Its has much heavy advantages .both microporous ceramic,ceramic membrane and ceramics fiber materials.The article primarily described the preparation technology and function token of ceramic fiber composite microporous membrane.Which main include:the choices of ceramic fiber,the preparation and dispersion of ceramic fiber which the rato of long path can be controlled,preparation technology and function of the microporous ceramic support,the chemistry constitutes of the ceramics fiber composite membrane and the influence of the every kind of factor on the membrane function,the vacuum forming technology of ceramics fiber composite and the influence of the every kind of factor on the membrane function,and the microstructure of the ceramics fiber composite microporous membrane was analysised by the scanning electron microscope (SEM) .The membrane matrix used by experiment is typically made of a dense,coarse-grained refractory material such as corundum,and ceramics binder,which has pore diameters of about 100 to 110 um,porosity is 38 %,and tensile strength is 38MPa.The membrane layer used by experiment is typically made of ceramics fiber,a dense,coarse-grained refractory materials and ceramics binder. The ceramic fiber is aluminosilicate containing an oxide of zirconia,which has diameters of about 3.5 to 4.5 um,the ratio of long path is about 10 to 500(m,.The membrane layer is comprised of 20-70 parts by weight of ceramics fiber,0-50 parts by weight of coarse-grained refractory materials and 20-30 parts by weight of ceramics binder. The membrane layer is formed by the vacuum forming technology . By controlling the weight and the ratio of long path of ceramics fiber,changing the operation factor reasonably of vacuum forming,we can obtain the ceramic fiber composite membrane layer,which has pore diameters of about 5 to about 30um,porosity is 50-80 %,and tensile strength is about 4.1to 18.1MPa and thickness of membrane layer is 0.5-2 mm,has the good thermal shock resistance and peal off.This study indicated that the weight and the ratio of long path of ceramics fiberhas influence greatly on the function of ceramics fiber composite microporous membrane . By using vacuum forming technology,controlling the operation fector reasonably,we can obtain ceramics membrane layer which has needs thickness uniformly and good function.