| 摘要 |
PURPOSE:To prevent the occurrence of a crack upon application of a heating and cooling cycle between a temperature of 900 deg.C to 1,100 deg.C and a temperature of room temperature 600 deg.C when a porous sintered body made of lanthanum manganite is used as an air electrode material for a solid electrolytic fuel cell. CONSTITUTION:In operating a generating device where a solid electrolytic fuel cell is used as a generating element, a rate for raising temperature up to operation level for starting the device, and lowering temperature from the level at the time of stopping the device, is kept equal to three degrees/minute or above at least over the temperature range of 800 deg.C to 900 deg.C. Or, the partial pressure of oxygen in the atmosphere where an air electrode is exposed at the time of raising the temperature up to the operation level for starting the device and lowering the temperature from the level for stopping the device, is kept between 10<-15>atm and 10<-1>atm at least over the temperature range of 800 deg.C to 900 deg.C. |
