| 摘要 |
<p>A piezoelectric element (1), for generating drive force for an injector, provided with a plurality of alternately stacked piezoelectric layers (11) expanding and contracting in accordance with application of voltage and internal electrode layers (21,22) for supplying the applied voltage, wherein the piezoelectric layers contain voids (611,612,613), but the total thickness in the stacking direction of the voids contained in any one piezoelectric layer is not more than 1/3 of the thickness in the stacking direction of the piezoelectric layer and the thickness in the stacking direction of each of the voids is not more than 50 mu m. <IMAGE></p> |
