Ceramic powder sinters for fuel cells - intensively mixes starting materials esp. nitrate(s) in water and citric acid and concentrates soln. until unstirrable before azeotropic distn.

摘要

Ceramic powder used in mfr, of sintered parts for fuel cells is web-chemically manufactured from an aqueous citrate soln., which is prepared by dissolution and intensive mixing of starting cpds., partic. nitrates in water and citric acid. The soln. is concentrated until it becomes unstirrable and is then subjected to azeotropic distillation by repeated mixing the soln. at boiling heat with toluol, so that it foams up. The foamed material is calcined below 500 deg.C. ADVANTAGE - Homogeneous, high sintering activity.