Method of polarizing at least one large area sheet of ferroelectric material
AssigneeInstitut Franco-Allemand de Recherches de Saint-Louis
InventorFran.cedilla.ois Bauer
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Abstract
A method of polarizing at least one large area sheet of ferroelectric material (1). The method comprises the following successive steps: placing films of ferroelectric material (2, 3) of thickness e.sub.1 against two opposite faces (1a, 1b) of the sheet (1) of thickness e.sub.2, the thickness e.sub.1 being a function of the respective coercive fields of the materials constituting the sheet (1) and the films (2, 3); placing electrodes (4, 5) on either side of and against the films of ferroelectric material (2, 3); compressing the resulting complex; and applying a cyclical voltage between the two electrodes (4, 5).
Claims14
A method of polarizing at least one sheet of ferroelectric material having an area, the method comprising the following successive steps:
- placing a film of ferroelectric material of film thickness e.sub.1 against each of opposite faces of the sheet of sheet thickness e.sub.2, the film thickness e.sub.1 being a function of the sheet thickness e.sub.2 and of a coercive field of each material of the sheet and of the films, the sheet of ferroelectric material and the films of ferroelectric material being made of different substances;
- placing an electrode against a side of each film of ferroelectric material remote from said sheet to form an assemembly;
- compressing the assembly;
- and
- applying a cyclical electric voltage between the two electrodes to polarize said sheet of ferroelectric material.
Dependencies are inferred from the claim text.