Dielectric ceramics

Details Dielectric ceramics Dielectric ceramics

C - Chemistry, Metallurgy

04

B

31/138

C04B 35/00 (2006.01) C04B 35/495 (2006.01) H01B 3/12 (2006.01)

Patent

CA 1296177

ABSTRACT OF THE DISCLOSURE 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.

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