Electrical generator or motor structure – Non-dynamoelectric – Piezoelectric elements and devices
Patent
1987-05-05
1988-11-22
Budd, Mark O.
Electrical generator or motor structure
Non-dynamoelectric
Piezoelectric elements and devices
310363, 310365, 310800, 310330, 310332, H01L 4108
Patent
active
047868376
ABSTRACT:
A method is described for making an electroconductive composite sheet electrode which is conformable and in which a slit-and-expanded or perforated nickel screen is embedded by heat and pressure, so that electrical leads can be easily and strongly attached to the nickel screen before or after integrally bonding a electroconductive sheet electrode to each side of at least one adjacent piezoelectric ceramic/polymer composite sheet electrode which is non-conductive. After poling, the resultant transducer has an increased combined transverse stiffness which increases the hydrostatic voltage coefficient, g.sub.h, as well as the overall hydrophone Figure of Merit. Because the nickel screen is formed from a continuous metal sheet by slitting and traction or by perforation, it possesses internal electrical continuity and is much more electroconductive than a conventional woven metal wire screen of the same dimensions, thereby enabling the conductive composite electrode to show higher electrical conductivity than a similar woven wire-reinforced one and also lowering the thermally generated electrical noise of the piezoelectric composite transducer formed therefrom.
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Breckenridge, Jr. George J.
Kalnin Ilmar L.
Budd Mark O.
Hoechst Celanese Corporation
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