Piezoelectric pressure-sensitive element and method for making s

Details Piezoelectric pressure-sensitive element and method for making s Piezoelectric pressure-sensitive element and method for making s

1988-06-17

1989-05-02

Cooper, Jack

Compositions

Piezoelectric

264 24, 523442, 523458, 528111, 528117, 528118, C04B 3500

Patent

active

048266167

ABSTRACT:
A piezoelectric pressure-sensitive element comprising a dispersion of a dipolarly oriented ferroelectric ceramic powder in a cured product of a composition comprised of an epoxy resin having at least two epoxy groups in the molecules, a compound having defined numbers of amino groups, benzene rings, carbonyl groups and methylene groups, and a crosslinking agent. A methd for making such a piezoelectric pressure-sensitive element is also described, in which the resin composition comprising a ferroelectric ceramic powder is thermally cured and applied with an electric field at a high temperature to cause dipolar orientation of at least the ceramic powder.

REFERENCES:
patent: 4239608 (1980-12-01), Pantelis
patent: 4521322 (1985-06-01), Broussoux et al.
patent: 4578442 (1986-03-01), Ohigashi et al.
patent: 4726099 (1988-02-01), Card et al.

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