Abstract: A highly temperature-resistant glass fiber and a preparation method therefor. The glass fiber comprises 62-66 wt % of SiO2, 14-19 wt % of Al2O3, 15-20 wt % of CaO, 0-2 wt % of MgO, 0-3 wt % of Fe2O3, and 0-1.2 wt % of TiO2, the total content of Na2O and K2O is 0.1-0.8 wt %. By precisely controlling the mixture of the components, the glass fiber has good resistance to high temperature and formability, and significantly increases the high-temperature softening point. The glass fiber has a forming temperature of not exceeding 1380° C., an upper limit temperature of devitrification of lower than 1280° C., and a high temperature softening temperature of 950° C. or above.

Abstract: A highly temperature-resistant glass fiber and a preparation method therefor. The glass fiber comprises 62-66 wt % of SiO2, 14-19 wt % of Al2O3, 15-20 wt % of CaO, 0-2 wt % of MgO, 0-3 wt % of Fe2O3, and 0-1.2 wt % of TiO2, the total content of Na2O and K2O is 0.1-0.8 wt %. By precisely controlling the mixture of the components, the glass fiber has good resistance to high temperature and formability, and significantly increases the high-temperature softening point. The glass fiber has a forming temperature of not exceeding 1380° C., an upper limit temperature of devitrification of lower than 1280° C., and a high temperature softening temperature of 950° C. or above.

Abstract: A low dielectric constant glass fiber, in mass percentage, includes 50%˜60% of SiO2, 10%˜20% of Al2O3, 12%˜20% of B2O3, 0˜4% of CaO, 4%˜10% of MgO, 0.1%˜0.5% of Na2O+K2O, 0˜0.5% of Li2O, 0.2%˜3% of F2 and 0˜0.2% of Fe2O3. Compared with the related art, the glass composition contains higher content of SiO2, which can greatly reduce dielectric properties of the glass fiber. Meanwhile, a small amount of F2 is added thereto, which not only can effectively improve the fiberizing temperature of the glass fiber but also can reduce glass viscosity and density and reduce glass refractive index and dielectric properties. In addition, lower content of CaO is further contained, but almost no alkali metal particles such as Na2O+K2O are contained, which further reduces the dielectric properties of the glass fiber.

Abstract: A low dielectric constant glass fiber, in mass percentage, includes 50%˜60% of SiO2, 10%˜20% of Al2O3, 12%˜20% of B2O3, 0˜4% of CaO, 4%˜10% of MgO, 0.1%˜0.5% of Na2O+K2O, 0˜0.5% of Li2O, 0.2%˜3% of F2 and 0˜0.2% of Fe2O3. Compared with the related art, the glass composition contains higher content of SiO2, which can greatly reduce dielectric properties of the glass fiber. Meanwhile, a small amount of F2 is added thereto, which not only can effectively improve the fiberizing temperature of the glass fiber but also can reduce glass viscosity and density and reduce glass refractive index and dielectric properties. In addition, lower content of CaO is further contained, but almost no alkali metal particles such as Na2O+K2O are contained, which further reduces the dielectric properties of the glass fiber.

Abstract: This invention discloses a kind of boron and fluorine-free fiberglass composite with its characteristic that it has the following compounds under particular mix ratio: SiO2, Al2O3, SiO2+Al2O3, CaO, MgO, TiO2, ZnO, Na2O+K2O and Fe2O3. The preferential process of this invention is: selection of mineral?grinding of mineral?compounding as per ratio?melting in furnace?outflow from platinum bushing?fiberizing?coating of infiltrating liquid?protofilament drying. Compared with the traditional E fiberglass, the composite of this invention has better mechanical performance (tensile strength increased by over 15% and elastic modulus increased by over 5%) and better corrosion resistance (resistance of acid and alkali increased by 20 times); its forming temperature (<1280° C.) and forming range (>80° C.) are proper with good fiberizing performance, which can be produced in large scale.

Abstract: This invention discloses a kind of boron and fluorine-free fiberglass composite with its characteristic that it has the following compounds under particular mix ratio: SiO2, Al2O3, SiO2+Al2O3, CaO, MgO, TiO2, ZnO, Na2O+K2O and Fe2O3. The preferential process of this invention is: selection of mineral?grinding of mineral?compounding as per ratio?melting in furnace?outflow from platinum bushing?fiberizing?coating of infiltrating liquid?protofilament drying. Compared with the traditional E fiberglass, the composite of this invention has better mechanical performance (tensile strength increased by over 15% and elastic modulus increased by over 5%) and better corrosion resistance (resistance of acid and alkali increased by 20 times); its forming temperature (<1280° C.) and forming range (>80° C.) are proper with good fiberizing performance, which can be produced in large scale.