| 摘要 |
<p>An object of the present invention is to obtain a dielectric ceramic composition wherein the dielectric constant ε is large, the temperature coefficient τf of the resonance frequency is close to 0, and which has a large Q value, by adding to and blending with a ceramic composition whose τf of the resonance frequency is large on the plus side a ceramic composition whose temperature coefficient τf is large on the minus side. In an Li2O-R2O3-TiO2-based composition where R is one or two or more of Nd, Sm, Pr and La, an improved dielectric constant ε can be achieved by introducing a specific quantity of Bi2O3, and τf can be shifted to the plus side and in addition a considerable improvement in Qf achieved by introducing a specific quantity of MO (where M is one or two of Ca and Sr). Furthermore, by introducing a specific quantity of Na2O together with the MO (where M is one or two of Ca and Sr), in particular in the case of material of εr≥ 150, it is possible to control τf to the vicinity of 0 while maintaining Qf at an high value.</p> |
