| 摘要 |
PROBLEM TO BE SOLVED: To obtain a ceramic having high dielectric constant and Q value, almost free form fluctuation of the characteristics and capable of being sintered at a low temperature by incorporating, as a first sub-component, SiO2 glass free from a Pb oxide in a specific ratio and, as a second sub-component, an Mn oxide in a specified ratio into a particular main component. SOLUTION: This composition is expressed by the formula x(BaαCaβ Srγ)O- y[TiO2)1-m(ZrO2)m]-zRe2O3 (wherein, x+y+z=100; α+β+γ=1; 0<=β+γ<0.8; 0<=m<0.15; and Re is at least one rare earth element). The content (a) of the first sub-component is >=0.1 and <=25 pts.wt. and the content (b) of the second sub-component is >1.5 and <=20 pts.wt. expressed in terms of MnO, each content being based on 100 pts.wt. of the main component whose molar composition ratio (BaαCaβSrγ)O, [(TiO2)1-m(ZrO2)m], Re2O3} of (BaαCaβSrγ)O, [(TiO2)1-m] and Re2O3 is contained in a region surrounded by points A (7, 85, 8), B (7, 59, 34), C (0, 59, 41) and D (0, 85, 15). |
