DIELECTRIC CERAMIC, AND LAMINATED CERAMIC CAPACITOR

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This invention provides a dielectric ceramic composed mainly of a compound represented by general formula : (Ba1-tCat) m(Ti1-u-xZruCux)O3 wherein 0.96 <= m <= 1.02, 0.001 <= x <= 0.03, 0 <= t <= 0.1 and 0 <= u <= 0.06. A specific rare earth element Re such as Dy, a specific metal element M such as Mn, and, further, Mg and Si are contained. The Cu is present in a homogeneously dispersed state in main phase particles constituting the main component. The content of each auxiliary component based on 100 parts by mole of the main component is Re : 0.1 to 1.5 parts by mole, M : 0.1 to 0.6 part by mole, Mg : 0.1 to 1.5 parts by mole, and Si : 0.1 to 2.0 parts by mole. The above constitution can realize a laminated ceramic capacitor that has high permittivity, has good temperature properties, is highly reliable, and causes no significant change in electrostatic capacitance with the elapse of time. © KIPO & WIPO 2008