| 摘要 |
PROBLEM TO BE SOLVED: To provide a piezoelectric ceramic composition that mainly comprises PbZrO3-PbTiO3-Pb(Sn1/3 Sb2/3)O3 and can be fired at a low temperature without large deterioration of the excellent electromechanical coupling factor and specific inductive capacity and its production. SOLUTION: Previously prepared calcination powder mainly comprising PbZrO3-PbTiO3-Pb(Sn1/3 Sb2/3)O3 is combined with Bi2O3 and Fe2O3 powders or combined with BaCO3, CuO and WO3 powders and the formulated powders are molded in a prescribed shape, and these molded products are fired at 1,000-1,100 deg.C to give the objective piezoelectric ceramic composition that contains PbZrO3-PbTiO3-Pb(Sn1/3 Sb2/3)O3 as the main and less than 10 wt.% of Bi and Fe elements calculated as BiFeO3 or less than 8 wt.% of Ba, Cu and W calculated as Ba(Cu1/2 W1/2)O3. |
