No abstract

As a preparation method of proton conducting BaCe 1¹x Y x O 3¹¤ , solid state reaction method and liquid phase mixing one from same raw materials have been compared. By solid state reaction of BaCO 3 , CeO 2 and Y 2 O 3 , segregation of Y 2 O 3 was observed in the specimens with x larger than 0.15. Employing liquid phase mixing method, BaCe 1x Y x O 3¤ single phase of 0.00¯x¯0.25 with homogeneous Y distribution, has been successfully prepared. It was revealed that crystal system of BaCe 1¹x Y x O 3¹¤ was orthorhombic distorted perovskite and monoclinic distorted one for 0.00¯x¯0.10 and 0.15¯x¯0.25, respectively. The abrupt increase of volume due to the structural phase transition was observed at x between 0.10 and 0.15.