Patent ID: 6566291
Filing Date: 2003-05-20
Classification: C04B,H05K

Abstract:
A dielectric ceramic composition formed primarily from a complex perovskite dielectric ceramic composition A2+(Bâ€²2+1/3Bâ€³5+2/3)O2âˆ’3 and having a hexagonal triple superlattice structure, whereina difference &Dgr;EDISâˆ’ORD between lattice energy EORD per unit atom of the hexagonal triple superlattice structure which is formed in a case where Bâ€²2+ ions and Bâ€³5+ ions are ordered in a 1:2 B-site sequence and lattice energy EDIS per unit atom of a simple perovskite structure formed when a B-site of the complex perovskite dielectric ceramic composition has a disordered configuration or that of a model structure approximated to a disordered configuration, satisfies the following equation &Dgr;EDISâˆ’ORD=EDISâˆ’EORD>77.8 (meV/atom), and wherein A represents Ba.