Characteristics of ceramic fiber profiled parts
01 Low thermal conductivity;
02 Excellent thermal shock resistance;
03 Excellent wind erosion resistance;
04 Excellent thermal stability, heat resistance of ceramic fiber special-shaped parts, under the 05 influence of temperature deformation is relatively small, the smaller the deformation, the higher the stability;
05 Low heat capacity, generally speaking, low heat capacity is in the absorption of more heat conditions will not have a large temperature rise, specific heat capacity is relatively large.
06 Ceramic fiber special-shaped parts can be made according to the shape and size of the special mold, according to the performance requirements of the product, choose different binders and additives, in order to meet the requirements of use;
07 Special treatment: If necessary, vacuum forming hardener or refractory mud can be applied to the shaped products to provide a protective layer.
Density of ceramic fiber profiled parts
Ceramic fiber special-shaped parts are divided into heat insulation sealing type and fire insulation type, fire insulation type of ceramic fiber special-shaped parts of thermal conductivity is lower than heat insulation sealing products, the price is relatively high. Ceramic fiber special-shaped parts of the volume density of 300-400kg/m3, 300kg/m3 density is a more conventional specifications, because of hardness, fire resistance, insulation performance is widely used; The density of 400kg/m3 is often used in the furnace fire, wind, temperature partition and other direct contact with the flame area, belongs to the extremely hard type.
Surface pretreatment of ceramic fiber special-shaped parts
The surface of special-shaped ceramic fiber was leveled by chemical or physical method, and the surface was smoothed by mechanical treatment. Under certain technological conditions, the surface of the special-shaped ceramic fiber pretreated is oxidized to form a dense and porous AL203 film layer. The pores of the porous oxide film generated after oxidation are closed to enhance the pollution prevention, corrosion resistance and wear resistance of the ceramic fiber special-shaped parts of the oxide film. The oxide film is colorless and transparent. The strong adsorption of the oxide film before the sealing is used to adsorb and deposit some metal salts in the membrane holes.
Thermal shock resistance of ceramic fiber profiled parts
The formation of thermal shock resistance: The addition of refractory fiber cotton with good dispersion during the production of special-shaped ceramic fiber parts can effectively improve the strength and thermal shock resistance. The crystallization of fiber surface and the healing effect of ceramic phase on both sides of the interface can prevent the matrix crack from further expanding. At the same time, it does not affect the energy dispersion and absorption of thermal shock through the interface, so that the material has high thermal shock resistance.
