Glass composition, glass fiber, and glass filler

Abstract

The present disclosure provides a glass composition having a low linear expansion coefficient and a high Young's modulus and suitable for mass production. The present disclosure provides: i) a glass composition containing, in mass %, 56≤SiO2≤70, 0.1≤B2O3≤8, 15≤Al2O3≤24, 4≤MgO≤14, 0≤CaO≤4, 0≤ZNO≤10, 0≤(Li2O+Na2O+K2O)≤4, and 0.1≤ZrO2≤5, wherein the glass composition is substantially free of TiO2; ii) a glass composition containing, in mass %, 56≤SiO2≤70, 0.1≤B2O3≤8, 15≤Al2O3≤24, 4≤MgO≤14, 0≤CaO≤4, 0.1≤ZnO≤3, and 0≤(Li2O+Na2O+K2O)≤4, wherein the glass composition is substantially free of TiO2 and ZrO2; and iii) a glass composition containing, in mass %, 56≤SiO2≤70, 0.1≤B2O3≤8, 15≤Al2O3≤24, 4≤MgO≤14, 0≤CaO≤4, 0≤ZnO≤10, 0≤(Li2O+Na2O+K2O)≤4, and 1≤ZrO2≤5.

Dependencies are inferred from the claim text.