| 摘要 |
<p>A dielectric ceramics which has a composition represented by the following general formula (I) and having a substantially perovskite crystal structure: (Ba1-xSrx) (Mg1-y-wNiyCow)1-u (Ta1-zNbz)uOp ... (I) wherein x, y, z, u, w and p satisfy one selected from the following conditions: x = 0, w = 0, z = 0, 0.001 </= y </= 0.088, 0.66 </= u < 0.72, and p represents a number with which the charges of the cations of Ba, Mg, Ni and Ta are neutralized, whereby the entire composition is electrically neutralized; x = 0, z = 0, 0.001 </= y </= 0.40, 0.001 </= w </= 0.40, 0.61 </= u </= 0.72, 0.002 </= y + w </= 0.40 and p represents a number with which the charges of the cations of Ba, Mg, Ni, Co and Ta are neutralized, whereby the entire composition is electrically neutralized; x = 0, w = 0, 0.04 </= y </= 0.90, 0.10 </= z < 0.96, 0.61 </= u </= 0.72, and p represents a number with which the charges of the cations of Ba, Mg, Ni, Nb and Ta are neutralized, whereby the entire composition is electrically neutralized; and w = 0, 0 < x </= 0.25, 0 </= y </= 0.5, 0 </= z </= 0.8, 0.61 </= u </= 0.72, and p represents a number with which the charges of the cations of Ba, Sr, Mg, Ni, Ta and Nb are neutralized, whereby the entire composition is electrically neutralized.</p> |
