Piezoelectric dispersion type organic damping composite

Details Piezoelectric dispersion type organic damping composite Piezoelectric dispersion type organic damping composite

1997-10-01

1999-12-14

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310311, H01L 4108

Patent

active

060021969

ABSTRACT:
A damping material having a loss factor tan .delta..gtoreq.1 and a small strain amplitude dependence, which is formed by dispersing an organic series dielectric or ferroelectric material in a non-dielectric polymer to have an acicular form wherein the acicular ratio is 5 or more, and the diameter of the acicular dielectric or ferroelectric material is 20 .mu.m or less when it takes a circular acicular form, or a side in cross section of the acicular dielectric or ferroelectric material is 20 .mu.m or less when it takes a rectangular acicular form. The volume ratio of the dielectric or the ferroelectric material to the non-dielectric polymer is preferably 0.3 to 0.7.

REFERENCES:
patent: 5309767 (1994-05-01), Parmar et al.
patent: 5667720 (1997-09-01), Onishi et al.

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