| 摘要 |
PURPOSE:To enhance the dielectric constant, insulation resistance and insulation breakdown voltage of the dielectric porcelain composition so as to enhance the quality Q of the composition by making the composition contain specific mol parts of more than two kinds among Nb2O5, Ta2O5, V2O5 as auxiliary components against main components BaO TiO2-Re2O3 that the composition contains in such a manner that when an expression is given as BaO-TiO2-Re2O3 (x), (y) and (z) are in a specific mol ratio range. CONSTITUTION:The dielectric porcelain composition is made to contain more than two kinds selected from Nb2O5, Ta2O5, V2O5 as its auxiliary component by the total of 0.001 to 0.010mol parts against 100 parts by weight of main components i. e., BaO-TiO2-Re2O3 that the composition contains in such a manner that when an expression is given as xBaO-yTiO2-zRe2O3 (x+y+z=1.00: Re2O3 is more than one kind of rare earth elements selected among La2O3, Pr2O11/3, Nd2O3 and Sm2O3), (x), (y) and (z) are in a mol ratio range surrounded by points (a) to (f) in the figure. It is thus made possible to obtain a dielectric porcelain composition of high dielectric constant, high insulation resistance, and high insulation breakdown voltage, being excellent in quality Q, and of a small temperature coefficient of electrostatic capacity. |
