72type-M Polycrystalline Alumina Fibre is mainly composed of 72% Al2O3 and 28% SiO2, and is prepared by the internationally leading "sol gel" method. Its performance indicators are at the international leading level, and it has excellent flexibility, 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 | 72-M | |
Chemical Composition AI2O3：SiO2（%） | 72-75:25-28 | |
Mineral Structure | Mullite | |
Classification Temperature （℃） | 1600 | |
Molten Point（℃） | ＞1800 | |
Density（g/cm3） | 3.1 | |
Average Fibre Diameter（μm） | 5.5-7.5 | |
Shot Content（%） | ≥45μm | 0-2 |
Impurity（%） | ＜0.5 | |
Monofilament tensile strength （MPa） | ≥1000 | |
Monofilament tensile modulus（GPa） | ≥100 | |
72-M type polycrystalline alumina fibre has excellent high temperature stability and chemical stability, and is used in the production and manufacture of high-temperature products such as high-temperature fibreboard, high-temperature fibre profiled parts, fibre blanket, fibre felt, fibre paper, etc., and is widely used in high-temperature insulation in the fields of steel, petrochemical, ceramics, sealing and heat insulation.
| Data Name | Download Now |
|---|---|
| XRD a of δ-Al2O3 phase fibre | Download Now |
| Chemical composition of 72-type polycrystalline alumina fibre cotton | Download Now |
Marketing:86-546-6083532
General:86-546-6083530
HR:13210386968
Investment:0546-6083531
Follow WeChat Official Account