| 摘要 |
PROBLEM TO BE SOLVED: To obtain a highly conductive oxide material composed of a double oxide expressed by a specific formula and having pyrochlore-type crystal structure. SOLUTION: High-purity CdO powder and Sb2 O3 powder having an average particle diameter of <=1μm are mixed with each other at a molar ratio of 2/1 in wet state with a ball mill, etc., and the mixture is dried, calcined at about 500-1,000C, crushed, kneaded with a binder such as PVA, formed and baked in air at about 700-1,400 deg.C to obtain a double oxide having a pyrochlore-type crystal structure and expressed by M2-x Sb2 O7 [M is Cd or Zn; -0.2<=x<=0.2] such as Cd2 SbO7 . The double oxide is doped with 0.01-20atom% of one or more elements selected from the group III metal elements such as In, Ga, Y, Al, La, Nd, Sm, Eu, Gd or Yb to obtain the objective electrically conductive transparent oxide.
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