| 摘要 |
PURPOSE:To easily produce the perovskite type oxide powder which is useful as an electrode material for fuel batteries and is uniform in two kinds of grain sizes in a large amt. by separately treating and calcining the org. acid salt and carbonate of the metal elements constituting the perovskite type oxide. CONSTITUTION:The org. acid salts, such as acetate, of the metal element constituting the perovskite type oxide, for example, La1-xA'MO3 (A' is Sr, Ba, M is Co, Cr, Mn, Ni, Fe) are mixed to prescribed ratios to prepare a soln. and this soln. is evaporated to dryness. The resulted product is pulverized and calcined and the calcined matter is pulverized to obtain the powder of the perovskite type oxide having <=1mum grain diameter. On the other hand, at least one of the metal elements constituting the above-mentioned oxide is formed of the carbonate and the other is formed of the simple substance or oxide. The above-mentioned powder is calcined while the oxygen is supplied, by which the powder having 5 to 10mum grain diameter is obtd. |
