Do you know why porous ceramic is useful? Take alumina ceramic foam as an example, we will answer this question for you.
Alumina ceramic foam is a porous ceramic. At first it was only used as purification material and bacterial filter material. With the continuous expansion of the use of foamed ceramics, its application fields are also gradually expanding. Its application fields have gradually expanded from filtration, thermal engineering and other fields to thermal insulation, sound absorption, electronics, optoelectronics, sensing, environmental biology and chemistry.
1. Environmental Materials
With the development of modern industry, more and more harmful gases and waste water are discharged from production in all walks of life. If not handled properly, it will seriously affect the living environment of human beings. Environmental protection has become the theme of the times. Foam ceramics have been used in automotive catalytic converters for a long time. The foam ceramic catalyst for deodorization can catalyze the combustion of organic solvents and malodorous gases in wastewater to achieve the purpose of deodorization and purification. The use of high-permeability foamed ceramics with high temperature resistance and sufficient thermal shock resistance can effectively remove warm and dusty gases. In the process of urban sewage treatment, foam ceramic materials have also become the materials used for aeration.
Many scientific research units are devoted to the research of porous hydroxyapatite bioceramic materials. Porous hydroxyapatite bioceramics are prepared by adding pore-forming agent and making foam ceramics. Its interconnected pores facilitate the infiltration and growth of tissue fluid microcirculation.
3. Food and hygiene industries
Foam ceramic material Foam ceramic has temperature resistance, corrosion resistance and good biological and chemical properties. It can be used in the concentration, separation and purification of physiologically active substances such as enzymes, vaccines, nucleic acids and proteins in the pharmaceutical industry. In the food and beverage industry, it is especially suitable for the filtration of beverages with high color, aroma and taste requirements and the filtration of low-alcohol alcohol, and can play a huge role in the production of beer.
4. Microporous membrane
The advantages of ceramic separation membranes such as acid and alkali resistance, erosion resistance, temperature resistance, aging resistance and long service life are recognized by people. It has been developed and applied in many fields such as food industry, biochemical industry, energy engineering, environmental engineering, electronic technology and so on. With the development of materials science, the preparation and application of nano-scale porous inorganic membranes has become a research hotspot.
5. Insulation material
Ceramic foam has the characteristics of low thermal conductivity and excellent thermal shock resistance, and is a kind of heat-resistant material. Typical heat-resistant materials made of foamed ceramics are heat-resistant bricks, which are made of Zr02, SiC, magnesium salts and calcium salts, and the operating temperature is up to 1600°C. It is used in the insulation of the space shuttle shell and the forced sweating of the head.