| 摘要 |
PROBLEM TO BE SOLVED: To produce dense lanthanum chromite ceramics usable as a part of solid electrolyte type fuel cells, ceramics heating elements, etc., and to provide a method for producing the dense lanthanum chromite ceramics. SOLUTION: The lanthanum chromite ceramics are represented by the formula LaCr1-XMgXO3. Furthermore, the lanthanum chromite ceramics contain Mg in an amount of X within the range 0.05-0.40 and have >=94% relative density and >=400 S.m-1 electroconductivity σ at 1,000 deg.C in the atmosphere in the lanthanum chromite ceramics. The lanthanum chromite ceramics are produced by heat-treating a raw material powder prepared by a wet synthetic method at <=1,000 deg.C temperature, preferably 800-1,000 deg.C, providing a powder having 0.01-0.3 μm average particle diameter in a single phase of perovskite and then sintering the resultant powder at <=1,800 deg.C temperature, preferably 1,500-1,800 deg.C in the atmosphere. |
