| 摘要 |
<p>A composition for the preparation of low-firing dielectric layers comprising an admixture of finely divided particles of: (a) MgTiO3; (b) 0-10% wt., basis total solids, CaTiO3; (c) 5-10% wt., basis total solids, zinc borate frit in which the atomic ratio of zinc to boron is 1-3, the frit containing 0-5% wt., basis total solids, BaO, and in which up to 50 mol % of the B2O3 is replaced by Al2O3; (d) 0-5% wt., basis total solids, of a barium compound selected from BaCO3, BaTiO3 and mixtures thereof; and (e) an amount of a divalent metal oxide or precursor thereof selected from MgO, CaO, ZnO and mixtures thereof in an amount approximately molarly equivalent to the amount of BaTiO3 in the composition, the total amount of Ba in the composition, calculated as BaO, being 1-5% wt. of the total solids, the solids being free of Pb-, Bi- and Cd-containing compounds. r</p> |
