Abstract: The disclosure belongs to the technical field of glass fibers, and specifically relates to a glass fiber composition with low dielectric loss. The content of each component of the composition is as follows: 50-60% of SiO2; 20-30% of B2O3; 8-18% of Al2O3; 1-6% of CaO; 0.2-1.50% of F2; 0.05-0.5% of SnO2; 0.05-0.5% of Li2O; and K2O+Na2O?0.05%. In the disclosure, SnO2 and F2 are both added, and the ratio of F2/SnO2 is controlled, such that not only glass fibers have relatively low dielectric constant and dielectric loss, but also the viscosity of the glass fibers is reduced, so that the number of bubbles in the glass fibers is zero. According to the disclosure, various components interact with one another, such that the glass fiber composition obtained has the low dielectric constant, low dielectric loss, few bubbles, low viscosity, and excellent glass performance.

Abstract: The present invention discloses a low thermal expansion coefficient glass fiber, belonging to the technical field of glass fibers. The glass fiber of the present invention is composed of the following ingredients: SiO2 55.0-63.0%, Al2O3 17.5-25.0%, MgO 9.0-16.5%, B2O3 2.0-9.0%, ZnO 0.1-4.5%, TiO2 0.1-4.0%, ZrO2 0.1-3.0%, HO2 0.1-2.0%, and Li2O 0.1-2.0%, where the sum of the contents of TiO2, ZrO2, and HO2 is 1.0-5.0%. According to the low expansion coefficient glass fiber of the present invention, CaO, K2O, and Na2O ingredients are not added, but B2O3, ZnO, TiO2, ZrO2, and HfO2 are simultaneously added, and the proportion of each element is optimized, significantly decreasing the expansion coefficient of the glass fiber in the present invention. The expansion coefficient of the glass fiber in the present invention is as low as 2.77×10?6/° C.

Abstract: An alkali-free ultrafine glass fiber formula includes the following components, in mass percentage calculated based on 100 Kg: SiO2: 50% to 65%, Al2O3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na2O and K2O: 0.1% to 0.8% in total, CeO2: 0.1% to 0.5%, Li2O: 0.1% to 0.7%, Fe2O3: 0.05% to 0.6%, TiO2: 0.1% to 1%, and impurities: the balance. In the preparation of alkali-free ultrafine glass fibers, no fluorine and boron-containing raw materials are used, and CeO2 and Li2O are introduced, which avoids the use of B2O3 and F that have a large impact on the environment, and reduces environmental pollution. A single fiber strength of prepared glass fibers is about 9% higher than that of the traditional E glass fibers, and the comprehensive performance of a prepared glass fiber product is significantly superior than that of the existing E glass fiber product.

Abstract: An alkali-free ultrafine glass fiber formula includes the following components, in mass percentage calculated based on 100 Kg: SiO2: 50% to 65%, Al2O3: 10% to 16.5%, CaO: 17% to 28%, MgO: 0.2% to 4.0%, Na2O and K2O: 0.1% to 0.8% in total, CeO2: 0.1% to 0.5%, Li2O: 0.1% to 0.7%, Fe2O3: 0.05% to 0.6%, TiO2: 0.1% to 1%, and impurities: the balance. In the preparation of alkali-free ultrafine glass fibers, no fluorine and boron-containing raw materials are used, and CeO2 and Li2O are introduced, which avoids the use of B2O3 and F that have a large impact on the environment, and reduces environmental pollution. A single fiber strength of prepared glass fibers is about 9% higher than that of the traditional E glass fibers, and the comprehensive performance of a prepared glass fiber product is significantly superior than that of the existing E glass fiber product.

Abstract: A high-modulus glass fiber composition based on basalt includes components with contents in mass percentage satisfying SiO2: 53.0%-60.0%; Al2O3: 24.5%-28.0 %; MgO: 8%-15.0%; Fe2O3: 1.5%-5.5%; TiO2: 2.0%-4.0%; 0<CaO?5.0%; and 0<Na2O+K2O?2.0%.

Abstract: A high-modulus glass fiber composition based on basalt includes components with contents in mass percentage satisfying SiO2: 53.0%-60.0%; Al2O3: 24.5%-28.0%; Al2O3: 8.0%-15.0%; Fe2O3:1.5%-5.5%; TiO2: 2.0%-4.0%; 0<CaO?5.0%; and 0<Na2O+K2O?2.0%.