What are the materials that make up the ceramic mold?
At present, the commercialized porous ceramic membranes are mainly composed of 3 types: flat plate, tubular and multi channel. Flat film is mainly used for small-scale industrial production and laboratory research. The tubular membrane is combined with rice to form a heat exchanger similar to a column tube heat exchanger, which can increase the loading capacity of the membrane, but is gradually withdrawn from industrial application due to its strength problem. The size of the applied ceramic membrane usually adopts a multi channel configuration, that is, a plurality of channels are distributed on a circular cross-section, and the number of general channels is 7, 19 and 37. The main business of the inorganic ceramic membrane preparation technology: using solid particle sintering preparation carrier and microfiltration membrane by sol-gel method in the preparation of ultrafiltration membrane: glass membrane by phase separation method: using special technology (such as chemical vapor deposition, electroless plating, etc.) the preparation of microporous membrane or dense membrane. Its basic theory involves colloid and surface chemistry, material chemistry, solid state ion science, material processing and so on.
From the development trend of rice, the development of ceramic membrane preparation technology mainly in the following 2 aspects: one is the porous membrane research, to further improve the already commercialized inorganic ultrafiltration and microfiltration membrane, nanofiltration membrane with molecular sieve, the development function of gas separation membrane and pervaporation membrane: two in dense membrane research solid electrolyte membrane, ultra-thin metal and its alloy film and ion conduction ability is research hotspot. The commercial porous membranes are mainly ultrafiltration and microfiltration membranes, and their preparation methods are mainly particle sintering and sol-gel. The former is mainly used for making microporous filter membranes, and commercial A1203 films are prepared by particle sintering method.
Ceramic membrane, also known as CT film, is one of the solid membrane, the earliest by Japan's large Japanese printing company and Toyo ink company in 1996, the introduction of the market. The ceramic coating is mainly A12O3, Zr02, Ti02 and Si02 of inorganic materials such as porous membrane preparation, the pore size of 250mm. Has good chemical stability, acid resistance, alkali resistance, solvent resistance, high mechanical strength, can reverse flushing: anti microbial ability: high temperature, narrow pore size distribution, higher separation efficiency characteristics, has been widely used in food industry, biological engineering, environmental engineering, chemical industry, petroleum chemical industry, metallurgy industry etc. The market sales, with an annual growth rate of 35% growth. Compared with plastic products of ceramic membrane with similar high cost, but also has many advantages, it is hard to withstand strong, durable, not easy to have chemical resistance village, invasive and high temperature liquid cleaning liquid has a stronger ability to resist, its main drawback is the price expensive. _ complex manufacturing process
