Piezoelectrics and related devices from ceramics dispersed in po

Details Piezoelectrics and related devices from ceramics dispersed in po Piezoelectrics and related devices from ceramics dispersed in po

1998-01-07

1999-09-14

Koslow, C. Melissa

Compositions

Piezoelectric

252 629RZ, 524413, H01L 4118

Patent

active

059519088

ABSTRACT:
This invention relates to compositions and processes for the fabrication of piezoelectric composites having improved figures of merit for both sensor and non-sensor applications. These composites comprise piezoelectric particles embedded in a polymer matrix. The improvements of this invention result from discoveries of the effects of polymer bulk compliance, polymer anisotropy, polymer melt index, and polymer/ceramic wettability on performance. The loss corrected figure of merit (g.sub.h d.sub.h /tan.delta.) obtained for the 0-3 composites is as high as 10.5.times.10.sup.-10 m.sup.2 /N, which is about four times higher than previously published for 0-3 composites of the prior art. Methods are described for the introduction of anisotropy into ceramic particle/polymer composites, so that cancellation effects that degrade the piezoelectric properties of composites can be reduced.

REFERENCES:
patent: 4595515 (1986-06-01), Wakino et al.
patent: 4624796 (1986-11-01), Ginoewicz
patent: 4675123 (1987-06-01), Tsunooka et al.
patent: 4944891 (1990-07-01), Sagong
patent: 5043622 (1991-08-01), Sagong
patent: 5702629 (1997-12-01), Cui et al.
Han et al.; Colloidal Processing for Improved Piezoelectric Properties of Flexible 0-3 Ceramic-Polymer Composites; J. Am. Ceram. Soc. 74, 1991; pp. 1699-1701 no month.
Waller et al.; Polling of Lead Zirconate Titanate Ceramics and Flexible Piezoelectric Composites by the Corona Discharge Technique; J. Am. Ceram. Soc. 72; 1989; pp. 322-324 no month.
Tandon et al.; Journal of Materials Science Letters 12; 1993; pp. 1182-1184 no month.
Klein et al., Composite Piezoelectric Paints; Proceedings of the Sixth IEEE International Symposium on Applications of Ferroelectrics; Jun. 8-11 1986; pp. 285-289 no month.
Pohanka et al.; Recent Advances in Piezoelectric Ceramics; pp. 45-145 (no date).

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