Patent ID: 6451244
Filing Date: 2002-09-17
Classification: C04B,H01L

Abstract:
A method for producing Pb(Ni&frac13;Nb&frac23;)O3â€”PbTiO3â€”PbZrO3 (PNNâ€”PTâ€”PZ) solid solution piezoelectric ceramics comprising a complex perovskite compound Pb(Ni&frac13;Nb&frac23;)O3 and simple perovskite compounds PbTiO3 and PbZrO3, which comprises:preparing a mixture of lead oxide (PbO), nickel oxide (NiO), niobium oxide (Nb2O5), titanium oxide (TiO2), and zirconium oxide (ZrO2) starting materials wherein the lead oxide (PbO) is present in an amount in excess of the stoichiometric amount of Pb in the PNNâ€”PTâ€”PZ solid solution, forming the mixture of starting materials, heat treating the formed mixture of starting materials in air, then dissolving unreacted starting materials in the heat treated thereby providing separate particles of the complex and simple perovskite compounds, molding the resulting particles, and then sintering the molded product to produce a sinter.