| 摘要 |
Disclosed is a glass not containing much B2O3, which is characterized in that a sintered body of a powder thereof does not have a bend in the thermal expansion curve. Specifically disclosed is a lead-free glass containing, in mol%, 35-41.5% of SiO2, 8-25% of MgO, more than 27% but not more than 35% of CaO, 0-2% of SrO. 0-4% of BaO, 5-15% of ZnO and 4.5-10% of Al2O3, with the total of these components being not less than 97%. When SrO and BaO are contained, the total content of them is not more than 2%. Also specifically disclosed is a lead-free glass containing, in mol%, 35-41.5% of SiO2, 8-25% of MgO, 10-27% of CaO, 0-12% of SrO, 04% of BaO, 5-15% of ZnO and 4.5-10% of Al2O3, with the total of these components being not less than 97%. |
