LOW-TEMPERATURE, FLUORIDE FREE FIBER GLASS COMPOSITIONS AND PRODUCTS MADE USING SAME

摘要

An essentially fluoride-free, boron-containing fiber glass composition has a forming window greater than 50°C and a forming temperature less than 1190°C, whereby it can substitute for conventional fluoride and boron-containing fiber glass composition without significantly changing operating parameters of the fiber forming process. The composition comprises: SiO2 50 - 54 weight percent, Al2O3 12 - 15 percent, CaO 22 - 25 percent, MgO 1 - 4 percent, B2O3 5 - 8 percent,Na2O + K2O less than 2 percent, Fe2O3 0.1 - 0.5 percent, F2 less than 0.1 percent.