Patent ID: 8912107

Claim:
A composition for preparing high-performance glass fiber comprising by weight percentages: SiO 2 57.5~62.5% Al 2 O 3 14.5~17.5% CaO 13.5~17.5% MgO 6.5~8.5% (CaO + MgO)/MgO >3 Li 2 O 0.05~0.6% B 2 O 3 0.1~2.0% TiO 2 0.1~2% Na 2 O 0.1~2% K 2 O 0.1~1% Fe 2 O 3 0.1~1% wherein the weight percentage of at least one of Li 2 O, B 2 O 3 or TiO 2 is greater than 0.5% and wherein 2.01≦CaO/MgO≦2.3.