| 摘要 |
A dielectric ceramic composition mainly comprises a major component which comprises barium, titanium, neodymium, samarium and oxygen and is represented by the following compositional formula: xBaO-yTiO2-zNd2O3-tSm2O3 wherein 0.1</=x</=0.2; 0.5</=y</=0.8; 0.01</=z</=0.2; 0</=t</=0.2, provided that x+y+z+t=1); and a minor component mainly comprising glass powder having a softening point of about 100 DEG to about 500 DEG C., which mainly comprises PbO, ZnO and B2O3, and GeO2, and wherein the content (a) (% by weight) of the glass powder falls within the range of 1</=a</=25 and the content (b) (% by weight) of GeO2 falls within the range of 0.5</=b</=10, on the basis of the weight of the major component. The major component may further comprise Bi2O3 and the composition may comprise bismuth as a minor component. The dielectric ceramic composition can be sintered at a low temperature and exhibits excellent characteristic properties such that it has a large specific dielectric constant epsilon r, a large unloaded Q and a small temperature coefficient of the resonance frequency.
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