| 摘要 |
PROBLEM TO BE SOLVED: To provide a ceria band composition of matter which is formed into a desired shape, is burned to a density higher than 95% of a theoretical density at <=1,600 deg.C, and forms a solid electrolyte. SOLUTION: The composition of the matter is expressed by the formula of Lnx Ln'x 'Ay Tiz Ce1-x-x '-y-z O2-δ (wherein, Ln is selected from the groups consisting of Sm, Gd and Y; Ln' is selected from the groups consisting of La, Pr, Nd, Pm, Eu, Tb, Dy, Ho, Er, Tm, Yb and Lu; A is selected from the groups consisting of Mg, Ca, Sr and Ba; and 0.05<=x<=0.25, 0<=x'<=0.25, 0<=y<=0.03, 0.001<=z<=0.03, 0.05<=x+x'<=0.25, and 0.001<=y+z<=0.03; and δ is a number applying neutral electric charge to the composition of the matter). |
