| 摘要 |
PURPOSE:To obtain easily the sinterable titled raw material powder having high perovskite content by forming coprecipitate of a specified metallic component and Nb, adding soln. of a Pb component and liquid for forming precipitate thereto, and calcining whole precipitate formed thereby. CONSTITUTION:Liquid for forming precipitate is added to aq. or alcoholic soln. of a Nb component and component A (at least one among Fe, Co, Ni, Mg, Mn, Zn, Cd, and In) to form coprecipitate of Nb and A component. Aq. soln. of Pb component is added to the slurry of the suspension, and the liquid for forming precipitate is added to the mixture. Formed precipitate is filtered dried and calcined at 400-1,000 deg.C after mixing, if necessary, with raw materials of ceramic. By this method, raw material powder for a perovskite type compound oxide ceramic contg. Nb expressed by PbAxNb1-xO3 is obtd. In the formula, x is 1/2 or 1/3. The raw material powder is fine particle and easily sinterable having characteristically high forming rate of perovskite. |
