| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a polarizing method of a laminated piezoelectric member wherein deformation of a laminated piezoelectric member which remains after polarization is reduced and generation of crack and cut can be reduced. <P>SOLUTION: In the laminated piezoelectric member 1A, at least two layers of piezoelectric ceramics layers 2, 3 are laminated by inserting an internal electrode 6 between the layers 2, 3, and external electrodes 4, 5 are arranged on a main surface and a main back surface. In a polarizing method wherein the two outside piezoelectric ceramics layers 2, 3 are polarized in the thickness direction and in the same direction, a second DC electric field E2 is applied between the internal electrode 6 and the other external electrode 5, simultaneously with applying a first DC electric field E1 between one of the external electrodes 4 and the internal electrode 6 in such a manner that the internal electrode 6 has a ground potential, one of the external electrodes 4 has a positive potential and the other external electrode 5 has a negative potential. <P>COPYRIGHT: (C)2004,JPO</p> |
