Dielectric ceramic compositions.

摘要

The present invention is directed to a dielectric ceramic composition composed of, 97.5 to 99.95 wt% of main component represented by, {100 - (a + b + c + d)}(Ba100-x Pbx) TiO3 + aZnO + bBi2O3 + cNb2O5 + dRe2O3 (0.5 </= a </= 4.5, 0.5 </= b </= 4.5, 0.5 </= c </= 4.5, 0.5 </= d </= 5.5 and 0 < x </= 6.0, and 0.05 to 2.5 wt% of first by-component consisting of glass whose main component is SiO2. Also, the present invention is directed to a dielectric ceramic composition composed of main component represented by, {100 - (a + b + c + d + e)}BaTiO3 + aZnO + bBi2O3 + cMeO2 + dNb2O5 + eRe2O3 (0.5 </= a </= 4.5, 2.0 </= b </= 6.0, 0.5 </= c </= 6.5, 0.5 </= d </= 4.5 and 0.5 </= e </= 5.5), and first by-component. Furthermore, the present invention is directed to a dielectric ceramic composition composed of main component represented by, {100 - (a + b + c + d + e + f)}BaTiO3 + aZnO + bBi2O3 + cNb2O5 + dMaO + eMbO2 + fRe2O3 (0.5 </= a </= 4.5, 2.0 </= b </= 6.0, 0.5 </= c </= 4.5, 0 < d </= 4.0, 6.5 </= e </= 10.0 and 0.5 </= f </= 5.5) and first by-component. The above-mentioned three dielectric ceramic compositions may also be composed of, 97.0 to 99.94 wt% of main component, 0.05 to 2.5 wt% of first by-component, and 0.01 to 0.5 wt% of second by-component consisting of at least one kind of oxides of Cr, Mn, Fe, Co and Ni.