| 摘要 |
PURPOSE:To lessen the variation of dielectric constant over a wide temperature range without containing Bi, and decrease dielectric loss by containing specific compounds at fixed rates. CONSTITUTION:A composition, containing 94.0-99.0 percentage by mol of BaTiO3, 0.5-3.0 percentage by mol of Ta2O5, and 0.5-3.0 percentage by mol, or the composition, further containing 0.2-7.0 percentage by weight of CaZrO3 against 100 of the composition as additive, is used as a high dielectric constant porcelain composition. The temperature of Curie point shifts toward plus side by the addition of the CaZrO3. Electrical characteristic is improved by adding 0.7 percentage by weight or less of one kind out of La2O3, Nd2O3, and Sm2O3, as a need arises. If the BaTiO3 is less than 94.0 percentage by mol, dielectric constant decreases, and if the BaTiO3 exceeds 99.0 percentage by mol, dielectric is not sintered. If the Ta2O5 exceeds 99.0 percentage by mol, the dielectric constant decreases, and the temperature variation of capacitor becomes large, and if the Ta2O5 is less than 0.5 percentage by mol, the dielectric element body is not sintered. |
