Ceramic gas supply components for fuel cells comprising zirconium oxide solid electrolyte

摘要

Electrically insulating ceramic gas supply plenums for solid electrolyte fuel cells in which the plenums are formed from a mixture of ceramic components and the proportions of the components in the mixture are adjusted to match the coefficient of thermal expansion of the plenum to that of the solid electrolyte. A preferred ceramic is formed from a mixture of MgO and Al2O3 having a MgO/Al2O3 molar ratio of from 1:1 and 7:1.