| 摘要 |
<p>A glass powder which consists essentially of, in mass %, 20 to 98 % of (SiO2 + B2O3 + Bi2O3), 0 to 18 % of Al2O3, 0 to 77 % of (MgO + CaO + SrO + BaO + ZnO), O to 75 % of PbO, O to 30 % of (Li2O + Na2O + K2O), O to 19 % of (TiO2 + ZnO2) and O to 5 % of (SnO2 + CeO2 + CuO), and has a volume average particle diameter D50 of 1.5 μm or more and a specific surface area (Θ) measured by the vapor adsorption BET method of 6 m2/g or more, as.</p> |
