| 摘要 |
PURPOSE:To produce a Pb contg. perovskite type oxide powder for producing the dielectric porcelain having a high density which is capable of sintering at a low temp. by mixing solutions of Zr and Ti compds. and a composite oxide obtd. by calcining, to a solution capable of forming a precipitate, calcining the obtained precipitate and mixing a Pb oxide followed by calcining the obtd. precipitate. CONSTITUTION:The each solutions of the Zr and Ti compds. and the composite oxide which is shown by AO.B2O5 (wherein A is >=one kind of Mg, Ni, Zn and Mn, B is Nb and Ta), and is obtd. by previously calcining, are mixed to the solution capable of forming the precipitate such as an aqueous solution of ammonia, etc. The obtd. precipitate is calcined, and the obtd. calcined product is mixed with a Pb oxide, followed by calcining and pulverizing it. By the method as mentioned above, the perovskite type piezoelectric ceramic particle composed of the oxide shown by the formula Pb(ZrtTi1-t)O3 (wherein t=0.1-0.9) and the oxide shown by the formula PbA1/3B2/3O3 is obtd. |
