Bismuth rare earth oxide solid solution and the production manner null of triclinic

摘要

PURPOSE: To obtain a bismuth rare earth element oxide solid solution of trigonal system structure useful as a sensor material having high function by mixing bismuth oxide with a prescribed oxide in a fixed molar ratio and heat-treating the mixture. ;CONSTITUTION: Bismuth oxide or a compound to be decomposed into bismuth oxide by heating is mixed with a rare earth element oxide of Dy, Ho, Y or Er or a compound to be decomposed into the rare earth element oxide by heating in the ratio of 45-50mol% in the case of the rare earth element of Dy or Er or 40-50mol% in the case of the rare earth element of Ho or Y. Then the mixture is heated to ≤90°C to give the objective bismuth rare earth element oxide solid solution of trigonal system structure of the formula (Ln is Dy, Ho, Y or Er; (x) is 0.4-0.5 when Ln is Dy or Er and (x) is 0.4-0.5 when Ln is Ho or Y).;COPYRIGHT: (C)1996,JPO