| 摘要 |
There is provided a dielectric ceramic composition wherein a main crystal phase is a perovskite-type crystal phase, comprising a complex oxide which contains, as a metal element, at least a rare earth element, Al, M (M is Sr, alternatively, Sr and Ca) and Ti, and is represented by the following composition formula: aLn2Ox bAl2O3 cMO dBaO eTiO2 wherein Ln is a rare earth element; and a, b, c, d and e is a mole ratio in a predetermined range, and more specifically comprising a solid solution of LnAlO(X+3)/2 (3</=x</=4) and RTiO3 (R is an alkaline earth metal containing at least Sr). This composition provides a large dielectric constant epsilon r and a high Q value in a high frequency region, and also lessens the variation in dielectric constant epsilon r, Q value, and resonance frequency temperature coefficient tau f. <IMAGE> |
