| 摘要 |
<p>The present invention provides a microwave dielectric ceramic composition in which epsilon r, Qu and tau f are generally controlled within a practical characteristic range and each of the characteristics is maintained in a well balanced state. A ceramic composition of the present invention comprises a composition represented by xBi2O3-(1-x)(yNb2O5-(1-y)Ta2O5) in which 0.45 </= x</= 0.55 and 0.1</=y<1.0 as a main ingredient, to which not more than 0.8 parts by weight of V2O5 is added and incorporated. An another ceramic composition comprises a composition represented by Bi(NbxTa1-x)O4 in which 0<x</=0.96 as a main ingredient, to which not more than 5wt% of V2O5 and not more than 2wt% of PbO are added and incorporated. An another ceramic composition comprises the main ingredient as described above to which not more than 5wt% of V2O5 and not more than 2wt% of MnO2 are added and incorporated. An another ceramic composition comprises the main ingredient as described above to which not more than 2wt% of V2O5 and not more than 1wt% of TiO2 are added and incorporated. An another ceramic composition comprises the main ingredient as described above, to which not more than 2wt% of V2O5, not more than 2wt% of MnO2 and not more than 0.7wt% of TiO2 are added and incorporated. Instead of TiO2 described above, not more than 0.5wt% (particularly not more than 0.4wt%) of PbO can be added and incorporated. <IMAGE></p> |
