摘要 |
PURPOSE:To enhance the insulation resistance, dielectric breakdown strength and density of the title compsn. by specifying x, y and z when the principal component is represented by a general formula xBaO.y[(TiO2)(1-m)(SnO2)m].zReO3/2 and by adding a specified amt. (expressed in terms of Ta2O5) of tantalum oxide. CONSTITUTION:This dielectric porcelain compsn. contains 100 pts.wt. principal component represented by the above-mentioned general formula (where x, y and z show a molar ratio within the ranges each defined by points a-f in the table, x+y+z=1.00, 0.01<=m<=0.20 and Re is one or more kinds of rare earth elements selected among La, Pr, Nd and Sm) and 0.1-10.0 pts.wt. (expressed in terms of Ta2O5) tantalum oxide as a secondary component. SnO2 enhances density and Ta2O5 enhances insulation resistance and dielectric breakdown strength. |