Glass components, glass fibers and glass fillers

Abstract

This invention provides a glass composition, expressed in mass percent as follows: 55≦SiO2≦65; 6<B2O3≦20; 12≦Al2O3≦20; 0≦MgO≦10; 0≦CaO≦4; 0≦SrO≦4; 3≦ZnO≦12; 0≦(Li2O+Na2O+K2O)≦2; 0.1≦TiO2≦5; 0≦ZrO2≦5; and at least one of the following groups is satisfied: a) 0.1≦ZrO2≦5. b) 56≦SiO2≦65 and 12≦Al2O3≦19 are satisfied, and it substantially does not contain BaO and As2O3. c) 56≦SiO2≦65, 12≦Al2O3≦19, and 3<ZnO≦12 are true, and there is no As2O3 in substance. none