| 摘要 |
PURPOSE: To prevent expansion in a high temperature, reducing atmosphere by forming an interconnector with a lanthanum chromite material represented by a formula of (La1-x Sx ) (Cr1-y Siy )O3 (wherein 0.1<=x<=0.2, 0.05<=y<=0.2). CONSTITUTION: Sr is used as a doping element to a lanthanum chromite, and silicon is added to increase conductivity. Coefficient of thermal expansion is about 10×10<-6> deg.C<-1> which is relatively large as ceramic, and expansion caused by oxygen releasing in a high temperature, reducing atmosphere is 0.13% or less. By increasing y value, that is, increasing the replacing amount of Cr with Si, reducing coefficient of expansion is decreased, conductivity is decreased, and coefficient of thermal expansion is also decreased. When y is 0.1, reducing coefficient of expansion is increased with increase in x value. As a result, values of 0.1<=x<=0.2, and 0.05<=y<=0.2 are preferable. |
