Basalt fiber is glass fiber drawn from natural basalt. Basalt fiber is a continuous fiber made of natural basalt as the main raw material, melted at 1450-1500 degrees Celsius, and drawn at high speed by a platinum rhodium alloy wire drawing leakage plate, the color is generally brown, with metallic luster. It is composed of oxides such as silica, alumina, calcium oxide, magnesium oxide, iron oxide, and titanium dioxide. Basalt fiber has a variety of excellent properties such as high strength, electrical insulation, corrosion resistance, high temperature resistance, aging resistance, etc., and has good compatibility with the environment and does not produce secondary pollution, so it is a veritable green high-performance new environmental protection material.
Excellent properties of basalt fibers:
1. Environmentally-friendly materials:
Basalt ore is a natural material, and no boron or other alkali metal oxides are discharged during its production process, so there is no precipitation of harmful substances in its smoke and dust, and it will not cause pollution to the atmosphere. Moreover, the product has a long service life, so it is a new type of green active environmental protection material with low cost, high performance and ideal cleanliness.
2. Excellent high temperature resistance and thermal shock stability:
The use temperature of basalt fiber is generally -260-880 degrees Celsius, which is much higher than that of aramid fiber, alkali-free E glass fiber, asbestos, rock wool and stainless steel; The thermal shock stability is good, it remains unchanged at a temperature of 500 degrees Celsius, and the original weight is lost by only 3% at 900 degrees Celsius.
3. Good chemical stability:
Basalt fibers have good resistance to acids and alkalis. Its durability, weather resistance, ultraviolet radiation resistance, water resistance, oxidation resistance and other properties are comparable to natural basalt heads.
4. High elastic modulus and tensile strength:
The elastic modulus of basalt fibers is 9,100-11,000 kg per square millimeter, which is higher than that of alkali-free glass fibers, asbestos, aramid fibers, polypropylene fibers and silicon fibers. The tensile strength of basalt fiber is 3800-4800-MPa, which is higher than that of large tow carbon fiber, aramid, PBI fiber, steel fiber, boron fiber, and alumina fiber, and is comparable to S glass fiber.
5. High sound absorption coefficient:
The sound absorption coefficient of basalt fiber is 0.9-0.99, which is higher than that of alkali-free glass fiber and silicon fiber. Excellent wave transmittance and certain wave absorption, excellent sound absorption and sound insulation, good stealth performance, can be made into stealth materials.
6. Good electrical insulation and dielectric properties:
The specific volume resistance of basalt fiber is higher, which is much higher than that of alkali-free glass fiber and silicon fiber. The volume resistivity is an order of magnitude higher than that of electrically insulating E fiberglass.
