Electricity: electrical systems and devices – Electric charge generating or conducting means – Use of forces of electric charge or field
Patent
1983-12-15
1986-09-09
Gellner, Michael L.
Electricity: electrical systems and devices
Electric charge generating or conducting means
Use of forces of electric charge or field
29 2535, H04R 1700
Patent
active
046112600
ABSTRACT:
Method and means for polarizing ferroelectric materials up to a predetermined polarization level include the application of an electric field E to these materials. According to this method the ferroelectric material is subjected to an alternating electric field E, the frequency of which ranges from about 0.001 to 1 Hz, and which is made to increase gradually and in a cyclic way between 0.+-.E.sub.N, E.sub.N being slightly in excess of the coercive force E.sub.C of said material. Simultaneously, the intensity i of the current traversing the material (2) is measured as a function of the applied field (E) using a unit of visualization, until a stable curve i=f(E) is attained. The invention is particularly suitable for obtaining a stable polarization of ferroelectric polymers, copolymers, crystals, and polycrystals, with the objective of using the piezoelectric and/or pyroelectric properties of these materials.
REFERENCES:
patent: 2706326 (1955-04-01), Mason
patent: 3531779 (1970-09-01), Hopkins et al.
patent: 3585611 (1971-06-01), Lefkowitz et al.
patent: 4086124 (1978-04-01), Peuzin et al.
patent: 4321155 (1982-03-01), Yamashita et al.
patent: 4381534 (1983-04-01), Danz
Deutsch-Franzosisches-Forschungsinstitut
Gellner Michael L.
LandOfFree
Method and device for polarizing ferroelectric materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and device for polarizing ferroelectric materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and device for polarizing ferroelectric materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1018277