Sic Foam ceramic. what-are-the-properties-of-foam-ceramicshttps://www.rtoceramic.com/
Silicon oxide (SiC) foam ceramics have the characteristics of low density, high strength, high porosity, high permeability. large specific area, corrosion resistance, oxidation resistance. good thermal insulation, thermal shock resistance and high temperature resistance, etc., And have been widely used in filtration, sound absorption, chemical fillers, bioceramics and catalyst carriers.
SiC is a kind of inorganic non-metallic material with strong covalent bond. it is difficult to sintering at low temperatures, even if the sintering additives are added. The sintering temperature is above 1400℃. Although the polycarbosilane bonding method can prepare SiC foam ceramics at low temperature. Its product line shrinkage rate is high and the cost is very high. And limiting its large-scale application. Aluminum dihydrogen phosphate has good water resistance. Small curing shrinkage rate, high temperature strength. It can achieve high strength bonding at lower temperatures.
It has been widely used in the field of ceramic fiber composite materials, refractory materials and inorganic coatings, and is used to prepare SiC foam ceramics, which is expected to achieve low temperature and low cost preparation of foam ceramics.
At present, SiC foam ceramics by the bonding method of aluminum dihydrogen phosphate at low temperature. The effects of aluminum dihydrogen phosphate content. Solid phase content and high temperature treatment on linear shrinkage. bulk density, flexural strength, porosity and microstructure of SiC foam ceramics were investigated. The evolution mechanism of structure and properties of SiC foam ceramics at high temperature was also discussed.https://www.chempackings.com/