Patent ID: 7605103

Claim:
A translucent ceramic comprising a component having a general formula of Ba{M x (A) y B2 z } v O w , wherein M is at least one member selected from the group consisting of Ti, Sn, Zr and Hf, B2 is a pentavalent metallic element, x+y+z=1, 0≦x≦0.9, 1.00≦z/y≦2.40, 1.00≦v≦1.05, w is a positive number required to maintain electroneutrality, and A is B1 or (B1 s B3 1-s ) in which B1 is a trivalent metallic element, B3 is a bivalent metallic element and 0<s<1, provided that when A is B1, x≦0.45 and z/y≦1.04.