Dielectric ceramic composition and method for designing dielectric ceramic composition

Abstract

The present invention provides a dielectric ceramic composition suitable for achieving a high Q-factor in a high-frequency range and a design method for newly developing such a dielectric ceramic composition. A dielectric ceramic composition is formed primarily from a complex perovskite dielectric ceramic composition A2+(B′2+1/3B″5+2/3)O2−3 and has a hexagonal triple superlattice structure, wherein a difference between the lattice energy EORD per unit atom of the hexagonal triple superlattice structure which is formed in a case where B′2+ ions and B″5+ ions are ordered in the 1:2 B-site sequence and the lattice energy EDIS per unit atom of a simple perovskite structure formed when the B-site of the complex perovskite dielectric ceramic composition has a disordered configuration or that of a model structure approximated to a disordered configuration; that is, ΔEDIS−ORD, satisfies the following equation ΔEDIS−ORD=EDIS−EORD≧77.8(meV/atom).

Dependencies are inferred from the claim text.