Cordierite mullite brick has good effect of resisting hot rock. This product is made of cordierite and high quality Mullite with good thermal shock resistance. It is pressed by high pressure, and sintered by special timing company after 1000 degrees high temperature.
What is cordierite mullite brick?
Cordierite mullite brick is also known as mullite cordierite brick. Cordierite and mullite have their own characteristics. In order to improve the use effect, the two kinds of cordierite are combined and manufactured through many development experiments. The product solves the problems of low toughness and low load of cordierite, and improves the thermal shock resistance effect of mullite. Cordierite mullite brick is composed of mullite, andalusite, and Plate corundum and cordierite are the main raw materials, supplemented by ultra-fine powder reinforced matrix, after mixing, molding, drying, and low-temperature firing. Because the firing temperature range of cordierite is very narrow, and the firing temperature is very important, the mullite cordierite brick prepared by gongzhi not only has excellent thermal shock resistance, but also has high thermal shock resistance (1100 ℃ water cooling ≥ 100 times, no crack), but also has a very high temperature It is suitable for ceramic industry car surface, porous push plate, roller kiln gasket, ceramic sagger and hot air ceramic burner.
Introduction of raw materials
Cordierite
Cordierite is a kind of silicate mineral with chemical composition of 2H0 • 2a12035s102. It is widely used because of its low coefficient of thermal expansion, excellent thermal stability and good thermal shock resistance. Often used as thermal shock data, it is widely used in automotive exhaust devices, catalyst carriers, heat-resistant coatings, heat transfer data, electronic packaging materials, foam ceramics, printed circuit boards, and some cold and hot mutation environments, such as ceramic heat exchangers, hot blast stoves, slots, shed panels, pillar bricks, etc.
Cordierite production process
Cordierite is a kind of product with excellent heat resistance. It is often used to produce the products with high content of cordierite (mg013,8%, 120334, 81i0251.4%). Cordierite refractories have high mechanical strength and low coefficient of thermal expansion. The flexural strength of cordierite refractories can reach 95 Pa. The coefficient of swelling is 2.0 × 10-6 ℃ - 1 in the scale of 20-800 ℃. It is mainly used for shed plate, shed plate, base plate, perforated plate, push plate and support brick in Taozi industry. Talc-a1203 is usually used.
Because the scale of the formation temperature of the cordierite is very small, the underfired cordierite can not be obtained, and the over burned cordierite will be divided into mullite and glassy. Therefore, the selection of high alumina cordierite products can not only expand the temperature scale of cordierite formation, but also avoid the differentiation of cordierite at high temperature, and improve the quality of cordierite. High alumina cordierite products have better function than clay cordierite products. According to the characteristics of cordierite formation, it is not possible to heat up too fast in the scale of 9001200 ℃ in order to discharge the green body
Internal crystallization water and promotion of talc differentiation. It is the stage of cordierite formation from 1200 ℃ to 1300 ℃. Within this temperature scale, the heating rate should be slow and stable
