COMPOSITION FOR PREPARING HIGH-PERFORMANCE GLASS FIBER BY TANK FURNACE PRODUCTION

摘要

A composition for preparing high-performance glass fiber by tank furnace production is provided. The composition contains the following components in percentage by weight: 57.5-62.5% of SiO2, 14.5-17.5% of Al2O3, 13.5-17.5% of CaO, 6.5-8.5% of MgO, 0.05-0.6% of Li2O, 0.1-2% of B2O3, 0.1-2% of TiO2, 0.1-2% of Na2O, 0.1-1% of K2O, and 0.1-1 % of Fe2O3, wherein the ratio of (CaO+MgO)/MgO is more than 3, and the content of at least one of Li2O, B2O3 and TiO2 is more than 0.5%. The present composition makes the melting, refinement and fiber forming performance of the glass close to that of boron-free E glass on the basis of maintaining high mechanical properties of the glass fiber, the composition facilitates large-scale industrialized production of tank furnace method, and has the manufacturing cost close to that of E glass.