The 72type-F polycrystalline alumina fibre is mainly composed of alumina and silica, and are prepared by the world's leading technical method- "sol-gel". AFIBRE alumina fibre has excellent flexibility and fire-resistant insulation properties,and its performance indicators are also at the leading international level.
Excellent high and low temperature resistance
α- The service temperature of Al2O3 Fibre is up to 1400℃-1800℃; After treatment with liquid nitrogen (- 196℃) for 24 hours, the strength did not decrease.
Acid and alkali resistance
Retention rate of fibre strength after soaking in 10% alkali solution for 24h: NaOH -- 40%; KOH--65%;NH4OH--95%;The fibre strength retention rate after soaking in 10% acid solution for 24h: HCl-96%; H2SO4--95%; HNO3--96%; H3PO4--95%。
Slag free ball
Our fibre are shot free (≥ 45 μ m), the fibre strength has been improved to a certain extent. At the same time, because the thermal insulation and fire resistance of the fiber are inversely proportional to the shot content, the lower the shot content, the higher the thermal insulation and fire resistance.
Excellent electrical insulation
The resistance of alumina fibre decreases with the increase of temperature. Above 600℃, the resistance tends to be constant. The dielectric constant and dielectric loss of alumina fibre are basically stable at high temperature and are suitable for high temperature wave transmission materials.
Excellent flexibility
Good flexibility: the fibre has high flexibility and is not easy to break in the process of acupuncture. It is a very suitable product for acupuncture.
Strong design
By adjusting chemical composition and heat treatment process, products with different properties can be obtained to meet different application needs.
Product Type | 72-F | |
Chemical Composition AI2O3:SiO2(%) | 72-75:25-28 | |
Mineral Structure | δ or δ+ Mullite | |
Classification Temperature (℃) | 1200 | |
Molten Point(℃) | >1800 | |
Density(g/cm3) | 3.1 | |
Average Fibre Diameter(μm) | 5.5-7.5 | |
Shot Content(%) | ≥45μm | 0-2 |
Impurity(%) | <0.5 | |
Tensile Strength(MPa) | 1200 | |
Modulus of Elasticity(GPa) | ≥100 | |
Slip casting during 1h(%) | 1200℃下≤1 |
The 72-F type alumina fibre has excellent flexibility and can be applied in the manufacturing of catalytic converter mat in the automotive industry, as well as in the reinforcement of metal based, ceramic based, and resin based composite materials, as well as various types of industrial high-temperature fields such as blankets and felt.
72-F型氧化铝纤维具有优秀的柔韧性,可应用于汽车行业的三元催化器衬垫制造;金属基、陶瓷基、树脂基复合材料的增强体;各种类型的毯、毡等工业高温领域。