After years of use and tempering in high-temperature kilns and equipment, aluminum silicate ceramic fiber products have become an indispensable material for heat preservation and sealing in the fields of high-temperature kilns and high-temperature equipment, and its performance is far better than other traditional Thermal insulation material, it has the following characteristics.
1. Small bulk density
Its bulk density is generally between 100~330kg/m3, which is only equivalent to 1/5~1/3 of lightweight refractory bricks.
2. Good thermal stability
Because the aluminum silicate fiber is elastic and long fiber, it will not generate structural stress even if the temperature changes sharply. The product is a porous material with interwoven fibers, and the expansion of the monomer fiber can be absorbed by the product itself. Therefore, with the appropriate construction technology, sufficient strength and resistance to rapid cold and heat can be obtained.
3. Good chemical stability
Except for strong alkali, hydrofluoric acid and phosphoric acid, it is hardly corroded by other chemicals. In oxidizing and neutral atmospheres, aluminum silicate fiber has excellent chemical stability. The chemical stability to reducing atmosphere, alkali metal oxides and sulfides is relatively poor, and crystallization is easy to occur, which deteriorates the performance of the fiber. The chemical stability of aluminum silicate fiber mainly depends on its chemical composition and the content of impurities. Pure Al2O3 fiber has the best chemical stability, and when SiO2 fluctuates in the range of 50% to 60%, the chemical stability is not affected. Big.
4. Good high temperature resistance
According to the different types of raw materials, aluminum silicate fiber can be divided into low temperature type (below 1000°C), standard type (below 1200°C), and high temperature type (1200~1400°C) according to the maximum use temperature. Compared with rock wool and glass wool The maximum use temperature (500~700℃) of other fibrous thermal insulation materials is much higher.
5. Small thermal conductivity
The thermal conductivity of aluminum silicate fiber in the high temperature zone is very small, and it has excellent thermal insulation effect. At 1000℃, its thermal conductivity is only 15% of refractory clay bricks and about 38% of light clay bricks, but its thermal conductivity has a lot to do with temperature, bulk density, slag ball content and fiber diameter. The thermal conductivity of aluminum silicate fiber decreases with the increase of bulk density, but its decreasing range gradually decreases. Even when the bulk density exceeds a certain range, the thermal conductivity no longer decreases, and has a tendency to increase.
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SHANDONG REDON HIGH-TEMPERATURE MATERIAL Co. ,LTD. has the domestic advanced production equipment and leading production technology, with an annual output of 1050 ceramic fiber series products, 1260 ceramic fiber series products, 1400 ceramic fiber series products, 1600 polycrystalline series products tens of thousands of tons. With cotton, blankets, blanket, board, paper and all kinds of textiles, special-shaped products, modules, folding, castable, spraying, etc. Various forms of more than 30 kinds of products, can meet the insulation requirements of high temperature field under different conditions, welcome to have a friend need to click the website lower right online customer service or submit online enquiry, we will contact you the first time.