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Basalt fiber reinforced aerogel high efficiency thermal insulation composite material

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Basalt fiber reinforced aerogel high efficiency thermal insulation composite material

　　Basalt fiber needle felt is used as reinforcing material. It is prepared by sol-gel process combined with supercritical drying technology, and has very low thermal conductivity. It can be applied to thermal protection of power battery of new energy vehicles. 　　Product features 　　Good thermal insulation effect and small space occupation: the thermal conductivity is 1 / 2 ~ 1 / 3 of that of traditional thermal insulation materials such as ultra-fine glass wool and calcium silicate. With the same thermal insulation effect, the space occupation is reduced by more than 50% compared with that of traditional thermal insulation materials such as ultra-fine glass wool, rock wool and calcium silicate. 　　Flame retardant, vibration resistance, salt spray resistance, damp heat and mold resistance: the flame retardant performance reaches grade A1 in GB8624; Passed the test of vibration and trampling resistance; The product has no change after damp heat and salt spray test, and the mildew growth degree of mold test is grade 0. 　　Product performance 　　Thickness: (1 ~ 6) mm; 　　Bulk density: (100 ~ 400) kg / m3; 　　Thermal conductivity: ≤ 0.02w / (m · K); 　　Flame retardant: class V-0; 　　Maximum service temperature: ≥ 600 ℃; 　　Hydrophobic rate: ≥ 99%; 　　Moisture content: ≤ 1%.

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Basalt Fiber Felt Series

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　　Basalt fiber needle felt is used as reinforcing material. It is prepared by sol-gel process combined with supercritical drying technology, and has very low thermal conductivity. It can be applied to thermal protection of power battery of new energy vehicles.

　　Product features

　　Good thermal insulation effect and small space occupation: the thermal conductivity is 1 / 2 ~ 1 / 3 of that of traditional thermal insulation materials such as ultra-fine glass wool and calcium silicate. With the same thermal insulation effect, the space occupation is reduced by more than 50% compared with that of traditional thermal insulation materials such as ultra-fine glass wool, rock wool and calcium silicate.

　　Flame retardant, vibration resistance, salt spray resistance, damp heat and mold resistance: the flame retardant performance reaches grade A1 in GB8624; Passed the test of vibration and trampling resistance; The product has no change after damp heat and salt spray test, and the mildew growth degree of mold test is grade 0.

　　Product performance

　　Thickness: (1 ~ 6) mm;

　　Bulk density: (100 ~ 400) kg / m3;

　　Thermal conductivity: ≤ 0.02w / (m · K);

　　Flame retardant: class V-0;

　　Maximum service temperature: ≥ 600 ℃;

　　Hydrophobic rate: ≥ 99%;

　　Moisture content: ≤ 1%.

Basalt fiber characteristics

Serial number	Product features	performance index
1	Outstanding mechanical properties	The density is 2.65 ~ 3.00g/cm3 and the tensile strength is 3300 ~ 4840mpa; The tensile strength, elastic modulus and elongation at break are higher than those of glass fiber, which has excellent wear resistance.
2	Excellent temperature resistance	The service temperature range of basalt fiber is: - 269 ℃ ~ 700 ℃; When working at 400 ℃ and 600 ℃, the fracture strength retention rate is ≥ 85% and ≥ 80% respectively; After 780 ~ 820 ℃ pretreatment, it can work at 860 ℃ without shrinkage.
3	Good chemical stability, acid and alkali corrosion resistance	K2O, MgO and TiO2 in the fiber significantly improve the chemical corrosion resistance and waterproof performance. The acidity coefficient of fiber is 4.86, pH=0.34； At 2mol / L After boiling in NaOH solution for 3 hours, the mass loss fraction was 0.0275%.
4	Good thermal shock resistance and stability	It can be used in 500 ℃ thermal vibration environment for a long time, and the mass loss is less than 0.02%, At 900 ℃, the mass loss is only 0.03%.
5	Wave absorption and magnetic permeability	It has excellent microwave absorption performance, and the microwave absorption performance can be further improved after surface modification of magnetic materials.
6	Excellent dielectric properties	The dielectric loss tangent of basalt fiber with volume resistivity greater than 1012 Ω· m and treated with special wetting agent is 50% lower than that of glass fiber, which can be used to manufacture new heat-resistant dielectric materials.
7	Sound absorption and heat insulation	It has excellent sound absorption and sound insulation performance, and its low frequency absorption coefficient and peak absorption coefficient are all higher than traditional sound absorbing foam, preoxygenation wire and so on. The thermal conductivity is more than 20% lower than that of glass fiber, which is much lower than that of rock wool and other thermal insulation materials.

　　Chongqing zhidu New Material Technology Co., Ltd. took the lead in mass production of ultra-fine basalt fiber (≤ 5um) in China. A series of high-strength and high modulus basalt fibers have been developed. The single fiber strength has exceeded 5800mpa and the fiber modulus has exceeded 100GPa. Compared with conventional basalt fibers, the properties have been greatly improved and have a wide application prospect.

Mechanical properties of high strength and high modulus basalt fiber

Fiber model	fiber diameter，um	Fiber monofilament strength，MPa	Fiber modulus，MPa
5-23	5	5730±80	104300±1500
7-46	7	5120±100	95100±1500
9-76	9	4800±80	91600±1400