Monolithic ceramic capacitor

Details Monolithic ceramic capacitor Monolithic ceramic capacitor

H - Electricity

01

G

H01G 4/12 (2006.01) C04B 35/468 (2006.01)

Patent

CA 2211057

A monolithic ceramic capacitor has dielectric ceramic layers of a material comprising barium titanate having alkali metal oxides impurities in an amount of not more than about 0.02% by weight, manganese oxide, cobalt oxide, and nickel oxide; from about 0.5 to 5.0 mols MgO to 100 mols of a main constituent shown by the following composition formula; (1-.alpha.-.beta.-Y) {BaO}m~TiO2 + .alpha.M2O3 + .beta.Re2O3 + Y(Mn1-x-yNixCoy)O wherein M2O3 is at least one of Sc2O3 and Y2O3; Re2O3 is at least one of Sm2O3 and Eu2O3 and .alpha., .beta., Y, m, x, and y are 0.0025 ~ .alpha. + .beta. ~ 0.025 0 ~ .beta. ~ 0.0075 0.0025 ~ Y ~ 0.05 y/(.alpha. + .beta.) ~ 4 0 ~ x < 1.0 0 ~ y < 1.0 0 ~ x + y < 1.0 1.000 < m < 1.035; an Li2O-B2O3-(Si, Ti)O2 oxide glass in an amount of from about 0.2 to 3.0 parts by weight to 100 parts by weight of the sum total of the main constituent and the magnesium oxide, and the internal electrodes are constituted by nickel or a nickel alloy.

Condensateur en céramique monolithique comportant plusieurs couches isolantes en céramique renfermant : du titanate de baryum dont la teneur en impuretés d'oxydes de métaux alcalins ne dépasse pas 0,02 % environ en poids, de l'oxyde de manganèse, de l'oxyde de cobalt et de l'oxyde de nickel; de 0,5 à 5,0 moles de MgO pour 100 moles d'un constituant principal, de formule (1-.alpha.-.bêta.-Y) {BaO}m~TiO2 + .alpha.M2O3 + .bêta.Re2O3 + Y(Mn1-x-yNixCoy)O, où M2O3 est au moins l'un des oxydes Sc2O3 ou Y2O3, Re2O3 est au moins l'un des oxydes Sm2O3 ou Eu2O3, et .alpha., .bêta., Y, m, x, et y sont 0,0025 ~ .alpha. + .bêta. ~ 0.025 0 ~ .bêta. ~ 0.0075 0.0025 ~ Y ~ 0.05 y/(.alpha. + .bêta.) ~ 4 0 ~ x < 1.0 0 ~ y < 1.0 0 ~ x + y < 1.0 1.000 < m < 1.035; du verre de Li2O-B2O3-(Si, Ti)O2, à raison de 0,2 à 3,0 parties en poids pour 100 parties en poids, somme totale du principal constituant et de l'oxyde de magnésium; les électrodes internes sont en nickel ou en alliage de nickel.

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