| 摘要 |
PURPOSE:To obtain the titled powder which has high bulky density and is easily sinterable in good reproducibility by precipitating Pb, Nb, Fe and W components successively stepwise and thereafter controlling the concn. of ammonium ion and pH and thereby completely precipitating all components. CONSTITUTION:Precipitate of Pb, Nb, Fe and W is successively stepwise produced in a wet process. Concn. of ammonium ion of the soln. contg. the precipitate is regulated to <=0.2mol/l and pH is regulated to >=11.5. Then an aq. soln. of nitrate of component A (one or more kinds of Mg, Zn, Ni and Mn) is added thereto and component A is precipitated. This precipitate is calcined to obtain both a compd. having a composite perovskite type structure which is easily sinterable and raw material powder of solid solution thereof. The above- mentioned compd. is shown in a formula (wherein (x), (y) and (z) shown mol%, x+y+z=100).
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