| 摘要 |
A body of polymeric piezoelectric material is nonuniformly poled by: applying an electric field across the thickness of the body, from one surface to another surface, of a strength sufficient to induce nonuniform polarization in the material; and reversing the polarity of the poling field, thereby increasing the nonuniformity. In a preferred embodiment, the material is poled at an elevated temperature; the poling field is of sufficient strength such that a portion of the body near one surface is polarized in one direction and a portion of the body near the other surface is polarized in a substantially opposite direction; and the polarity of the poling field is reversed a plurality of times. A flexure element comprising a continuous body of polymeric piezoelectric material nonuniformly poled according to the method of the present invention, exhibits strong flexure response to applied fields. Novel elements produced according to the preferred embodiment of the present invention are characterized by having polarization in one direction near one surface of the body and polarization in the opposite direction near the opposite surface of the body.
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