85 type polycrystalline alumina fibre is a product between 72 type fibre and 95 type fibre. It is made of 85% Al2O3 and 15% SiO2 as the main components by the internationally leading "sol gel" method. Its performance indicators are at the international leading level, and it has excellent flexibility and fire resistance and thermal insulation performance.
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 | 85 type | |
Chemical Composition AI2O3：SiO2（%） | 85-88:12-15 | |
Mineral Structure | Mullite +α | |
Classification Temperature （℃） | 1700 | |
Molten Point（℃） | ＞1900 | |
Density（g/cm3） | 3.2 | |
Average Fibre Diameter（μm） | 4-7 | |
| Shot Content（%） | ≥45μm | 0-2 |
Impurity（%） | ＜0.5 | |
Tensile Strength（MPa） | — | |
Modulus of Elasticity（GPa） | — | |
Slip casting during 1h（%） | 1600℃下 ≤2 | |
85 type polycrystalline alumina fibre is a product between type 72 fibre and type 95 fibre. It is mainly customized by customers and has good flexibility and high temperature stability. It can be used as raw material for downstream products and composite reinforcement materials.
85型氧化铝纤维是介于72型纤维和95型纤维中间的一款产品，以客户定制为主，具有良好的柔韧性和高温稳定性能，可做下游制品原材料，也可用于复合增强材料使用。
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