01 Excellent high and low temperature resistance

α- The service temperature of Al₂O₃ ,fibre is up to 1600℃, and that of mullite fibre is up to 1400℃; After treatment with liquid nitrogen (- 196℃) for 24 hours, the strength did not decrease.

02 Acid and alkali resistance

Retention rate of fibre strength after soaking in 10% alkaline solution for 24 hours: NaOH -- 40%; KOH--65%; NH₄OH--95%; Retention rate of fibre strength after soaking in 10% acid solution for 24 hours: HCl -- 96%; H₂SO₄--95%; HNO₃--96%; H₃PO₄--95%.

03 Good thermal insulation performance

The device made of alumina continuous fibre has a hot surface temperature of 800 ℃ and a cold surface temperature of 278 ℃; When the hot surface temperature is 1000 ℃, the cold surface temperature is 388 ℃.

04 Excellent electrical properties and 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.

05 Excellent flexibility

At room temperature, alumina fibre can be bent 1400 times, After high temperature treatment at 1000 ℃, it can still be bent for 60 times.

06 Strong design

By adjusting chemical composition and heat treatment process, products with different properties can be obtained to meet different application needs.

Performance	AF17	AF18	AF19
Chemical composition  （wt.%）	72 Al2O3+28 SiO2	85 Al2O3+15 SiO2	≥99 Al2O3
Crystalline phase	γ-Al2O3+Amorphous	α-Al2O3+Mullite	α-Al2O3+Mullite
Melting point（℃）	1800	2000	2000
Continuous use temperature（℃）	≥1200	≥1300	≥1100
Monofilament diameter（μm）	9-12	11-14	11-14
Density（g/m3）	3.0	3.4	3.9
Tex（g/km）	67/200	100/167	100/167
Monofilament tensile strength（GPa）	≥2.0	≥2.0	≥3.0
Monofilament tensile modulus（GPa）	≥170	≥240	≥330

 AF17 Fibre 

The fibre is microcrystalline polycrystalline（γ-Al₂O₃), diameter 9-12μm. The tensile strength at room temperature can reach more than 2.0GPa, and the service temperature is more than 1200℃. It has good high temperature resistance and creep resistance.

 AF18 Fibre 

The fibre is in micro crystalline state（ α- Al₂O₃+ mullite), diameter 11-14μm. The tensile strength at room temperature can reach more than 2.0GPa, and the service temperature is more than 1300℃. At present, alumina fibre has the best creep resistance. Below 1100℃, the strength is basically unchanged. At 1200℃, more than 90% of the room temperature strength is retained, and at 1300℃, more than 80% of the room temperature strength is retained.

AF19Fiber 

The fibre is in micro crystalline state（ α- Al₂O₃), diameter 11-14 μm. The tensile strength at room temperature can reach more than 3.0Gpa, and the service temperature is more than 1000℃. High strength at room temperature, good mechanical properties, can be used as composite reinforcement, but poor creep resistance at high temperature.

 Aerospace  

■ Alumina continuous fibre can be used in hypersonic aircraft, radomes and radar radomes. It has become a trend to use alumina continuous fibre as a new generation material with higher temperature requirements. European and American countries have applied this material to space shuttles, starships and weapons and equipment, which can play a good role in temperature resistance and heat insulation.

■ Alumina continuous fibre ceramic matrix composites have excellent high-temperature strength, which can be used in rocket motor combustion chamber insulation layer, nozzle outlet cone and other related parts, and it is also an ideal material for thermal structure insulation connection between nozzle and combustion chamber of solid motor. In addition, it can also be used for hot end components of aviation turbojet engine.

■ Aluminum oxide continuous fibre reinforced metal matrix composites are used for mechanical parts bearing high load and high-temperature and high-speed rotating parts such as transmission devices of helicopters; It can also be used in solid rocket motor nozzle.

■ Alumina continuous fibre reinforced light alloy can be used in the military industry. For example, the reinforced aluminum matrix composite is an ideal material for the pistons of armored vehicles and tank engines. The U.S. Army uses continuous alumina fibre reinforced composite to manufacture tank track shoes, reducing the weight from 544kg of cast steel to 272-363kg; It can also be made into a solid motor shell for air launched missiles. Its bursting pressure is the same as that of steel, and its mass is 11% lighter than that of aluminum alloy.

  Industrial sector  

■ ACCR composite core wire: aluminum oxide continuous fibre (af19) is embedded in aluminum alloy wire, and its mechanical and electrical properties far exceed that of steel core. ACCR composite core can reach 8 times of the breaking strength of the same aluminum wire, and its weight is only 1/2 of that of the same volume steel core; The conductivity is much higher than that of the steel core, and the linear expansion rate is less than 1/2 of that of the steel core.

  Consumer electronics  

■ 5G communication field: AF19 alumina continuous fibre has unique characteristics of heat conduction, insulation and wave transmission, and can be used to make mobile phone backplane materials. It has unique value for the application demand of ultra-low delay of 5g smart phone signals in the future, and can effectively solve the problem of temperature rise in wireless area and signal dilemma.

  Environmental protection 

■ High temperature thermal insulation material: the braidability of the fibre makes it applicable to the thermal insulation parts and three-dimensional braided parts that need to be connected; It can also be used as lining insulation material in metallurgical furnace, ceramic sintering furnace or other high-temperature furnaces. With low density, good insulation and small heat capacity, it can not only reduce the furnace body weight, but also improve the temperature control accuracy, with remarkable energy-saving effect.

■ Chemical corrosion resistant materials: with its excellent corrosion resistance, alumina continuous fibre can effectively meet the high-temperature filtration in pressurized fluidized bed combustion combined cycle (pfbcc) and integrated coal gasification combined cycle (IGCC) power generation technology.