After many years of use and tempering, the ceramic fiber blanket has been continuously improved in quality and has become more and more important in the market of thermal insulation materials. It has become an indispensable material for thermal insulation and sealing in the fields of high-temperature furnaces and high-temperature equipment.
Its performance is far superior to other traditional insulation products, and today we will give you a systematic introduction to the ceramic fiber blanket insulation materials.
High temperature resistance: According to the different classification of ceramic fiber blankets, the temperature of use can be divided into: the temperature of common ceramic fiber blanket can reach 950 °C, the temperature of standard ceramic fiber blanket can reach 1000 °C, high spring row ceramic fiber blanket The use temperature can reach 1100 ° C, the high aluminum ceramic fiber blanket can be used up to 1200 ° C, and the zirconium – containing ceramic fiber blanket can be used up to 1350 ° C.
Low thermal conductivity: The ceramic fiber blanket fiber has a small thermal conductivity in the high temperature zone and has excellent thermal insulation effect. At 1000 ° C, its thermal conductivity is only 15% of refractory clay bricks, about 38% of lightweight clay bricks, but its thermal conductivity is closely related to temperature, bulk density, slag ball content and fiber diameter. The thermal conductivity of ceramic fiber blanket fiber decreases with the increase of bulk density, but the decreasing extent is gradually reduced. Even when the bulk density exceeds a certain range, the thermal conductivity no longer decreases, and there is an increasing trend.
Good chemical stability: Except for strong alkali, fluorine and phosphoric acid, it is hardly eroded by any chemicals. In the environment of oxidation and neutrality, ceramic fiber blanket fiber has excellent chemical stability.
The chemical stability of the reducing atmosphere, alkali metal oxides and sulfides is relatively poor, and crystallization is liable to occur, deteriorating the fiber properties. The chemical stability of ceramic fiber blanket fiber mainly depends on its chemical composition and impurity content. Pure Al2O3 fiber has the best chemical stability, while SiO2 does not affect the chemical stability when it fluctuates within 50%~60%. Big.
Good thermal shock resistance: Since the ceramic fiber blanket fiber has good elasticity and long fiber, even if the temperature changes abruptly, no structural stress will occur, and the product is a porous material in which the fibers are interwoven, and the monomer fiber The expansion can be absorbed by the article itself. Therefore, with sufficient construction technology, sufficient strength and resistance to quenching and rapid heat can be obtained.
Small volume density: its bulk density is generally between 100~330kg/m3, which is only 1/5~1/3 of light refractory brick.
Good insulation properties: Ceramic fiber blanket fibers are insulating materials.
Good sound absorption performance: Ceramic fiber blanket fiber has high sound absorption performance and can be used as high temperature sound absorbing material in buildings.
Good machinability: Ceramic fiber blanket fiber has good elasticity, soft and easy to cut.