Dielectric ceramic compositions

摘要

The present invention discloses a dielectric ceramic composition having a formula represented by (1-x)Nd(Ga1-yAly)O3-xCaTiO3, wherein x refers a mole fraction of CaTiO3 to the composition and satisfies an expression of 0.5<=x<=0.8, and y refers a mole fraction of Al to Ga and satisfies an expression of 0<=y<=0.9. The present dielectric substance has a high dielectric constant and a high Q value and a resonant frequency temperature coefficient of near 0. Also, it cam be sintered at a low temperature and thus replace the conventional dielectric materials used as a filter for parts of mobile communication or satellite communication appliances.