DIELECTRIC CERAMIC COMPOSITION AND CERAMIC ELECTRONIC DEVICE

摘要

A dielectric ceramic composition and a ceramic electric device having a dielectric layer composed of the dielectric ceramic composition including a main component having a perovskite crystal structure expressed by general formula ABO3, an oxide of Eu, an oxide of Ra (Sc, Er, Tm, Yb and Lu), an oxide of Rb (Y, Dy, Ho, Tb and Gd) and an oxide of Si, in which 0.075≦α≦0.5, 0.5≦β≦3, 1.0≦γ≦4, 1.5≦δ≦5, and 0.030≦α/δ≦0.250 where a content of an oxide of Eu is α mole, a content of the oxide of Ra is β mole, a content of the oxide of Rb is γ mole, and a content of the second sub-component is δ mole with respect to 100 moles of the main component.

主权项

1. A dielectric ceramic composition comprising:
a main component having a perovskite crystal structure expressed by general formula ABO3 where A is at least one selected from Ba, Ca, and Sr and B is at least one selected from Ti and Zr; a first sub-component of oxides of at least three rare earth elements containing Eu; and a second sub-component of an oxide of Si, wherein at least an oxide of Eu, an oxide of Ra and an oxide of Rb are contained as the first sub-component where Ra is at least one selected from Sc, Er, Tm, Yb and Lu, and Rb is at least one selected from Y, Dy, Ho, Tb and Gd,
0.075≦α≦0.5,0.5≦β≦3,1.0≦γ≦4,1.5≦δ≦5, and0.030≦α/δ≦0.250 where a content of an oxide of Eu is α mole in terms of Eu2O3, a content of the oxide of Ra is β mole in terms of Ra2O3, a content of the oxide of Rb is γ mole in terms of Rb2O3, and a content of the second sub-component is 8 mole in terms of SiO2 with respect to 100 moles of the main component.