The use, effect, benefits of aluminum dihydrogen phosphate to foam ceramic filter plates

Zhengzhou yucai chemical Industry - Aluminum Dihydrogen Phosphate
Zhengzhou Yucai Chemical Co., Ltd. has a specific gravity of 1.47 1.5 1.55 1.58, which can also be customized according to customers' specifications. Adding dihydrogen phosphate in the production of ceramic foam products has the following experiences for your reference:
(1) As a binder, when the density of aluminum dihydrogen phosphate is 1.35 g/cm3, the slurry has good viscosity and thixotropy. At the same time, as the content of the aluminum dihydrogen phosphate solution increases, the sizing sponge mesh becomes smaller (the larger the pore size value).
(2) The higher the concentration of the aluminum dihydrogen phosphate solution, the higher the strength of the green body after drying, but the more easily the green body regains moisture. On the contrary, the lower the concentration of the aluminum dihydrogen phosphate solution, the lower the strength of the green body after drying, but it is not easy to regain moisture.
(3) After sintering at a high temperature of 1180 ° C, the aluminum dihydrogen phosphate is converted into aluminum phosphate, so that the product has a certain strength. Alumina foam ceramic products mainly exhibit corundum, AlPO4 tri-slant and a small amount of quartz crystal phase. The strength of the product mainly depends on the combination of high-temperature aluminum dihydrogen phosphate to form aluminum phosphate Al-O-P-O-Al, and the product strength is not high. For this reason, it is recommended to increase the firing temperature to above 1250 ° C to produce a high strength mullite crystal phase to improve product strength.
(4) Aluminum dihydrogen phosphate has no intensity at low temperature and high medium temperature strength. When it is 1 000～1 300 °C, it starts to sinter, decomposes and deducts P2O5, forms ceramic bond, does not form low-melt at high temperature, and is a medium-high temperature coating bond. The first choice.

Aluminum dihydrogen phosphate has the advantages of good water resistance, small curing shrinkage, high temperature strength, high strength bonding at lower temperatures, etc. It has been widely used in the fields of ceramic fiber composite materials, refractory materials and inorganic coatings. For the preparation of foam ceramics, low-cost preparation of foam ceramics is expected. At present, there are few reports on the preparation of foam ceramics by the aluminum dihydrogen phosphate bonding method at home and abroad. Preparation of foam ceramics by using aluminum dihydrogen phosphate as binder, the effect of aluminum dihydrogen phosphate content, solid phase content and high temperature treatment on the linear shrinkage, bulk density, flexural strength, open porosity and micromorphology of foam ceramics And confirm the structure and performance evolution mechanism of foam ceramics at high temperatures.

Uses: Mainly used in electrical industry, high temperature kiln, heat treatment resistance furnace, ceramic building, electrical insulation, etc., mainly used for high temperature kiln refractory binder. Use refractory spray coatings, fire mud, castables and bonding agents for the foundry industry. It is mainly used in the production of corundum, chrome steel jade nozzles for refractory industry and chrome aluminum zirconium corundum brick for coal water slurry gasifiers.