| 摘要 |
To provide a method for producing a piezoelectric ceramic which can improve toughness thereof. Provided is a method for producing a piezoelectric ceramic which includes a step of polarizing a piezoelectric ceramic having a main component represented by a composition formula Pba[(MnbNbc)dTieZrf]O3, wherein a to f satisfy 0.98<=a<=1.01, 0.340<=b<=0.384, 0.616<=c<=0.660, 0.08<=d<=0.12, 0.500<=e<=0.540, 0.37<=f<=0.41, and bd+cd+e+f=1, and 1 to 10% by weight of Al in terms of Al2O3 as an additive, and heat-treating the polarized piezoelectric ceramic for 10 to 60 minutes in a range of 200 to 300° C. As a result of this heat treatment, toughness of the piezoelectric ceramic can be improved.
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