Patent ID: 7656269

Claim:
A sintered electroconductive oxide containing a perovskite phase of perovskite-type crystal structure represented by the composition formula: M1 a M2 b M3 c Al d Cr e O f where M1 is at least one of elements of group 3A other than La; M2 is at least one of elements of group 2A; M3 is at least one of elements of groups 4A, 5A, 6A, 7A and 8 other than Cr; and a, b, c, d, e and f satisfy the following conditional expressions: 0.600≦a≦1.000; 0≦b≦0.400; 0.150≦c<0.600; 0.400≦d≦0.800; 0≦e≦0.050; 0< e /( c+e )≦0.18; and 2.80≦f≦3.30.