Abstract
Composite piezaele. ctrics made from Calcium-modified lead titanate rods embedded in a polymer matrix have been evaluated for hydrophone applications. These composites behave quite differently from the conventional 1–3 composites made with lead zirconate titanate ceramics. Specifically, in the modified lead-titanate case the magnitude of the d31 coefficient is enhanced in the composite structure, and consequently the hydrostatic dhcoefficient is suppressed. Nevertheless, these composites exhibit a large gk coefficient and a remarkable pressure stability. An analysis shows that a substantial contribution to the composite's d31 coefficient arises from internal stresses which develop along the ceramic rods and produce a piezoelectric charge through the d33 coefficient of the ceramic. This effect is particularly pronounced in the composite structure of the modified lead-titanate ceramic since the ratio d33ld31 in this ceramic is exceptionally large.
| Original language | English |
|---|---|
| Pages (from-to) | 177-182 |
| Number of pages | 6 |
| Journal | Ferroelectrics |
| Volume | 93 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 May 1989 |
| Externally published | Yes |
Bibliographical note
Funding Information:This work was supported in part by the Office of Naval Technology. We are indebted to: John %la. Donald Dorman. Michael Athanas, and Kevin McKeon of Philips Laboratories for help in making and characterizing the samples; and to Virgil Aptolim of the Naval Research Laboratory Underwater Sound Reference Detachment for help in the hydrostatic measurements.
Funding
This work was supported in part by the Office of Naval Technology. We are indebted to: John %la. Donald Dorman. Michael Athanas, and Kevin McKeon of Philips Laboratories for help in making and characterizing the samples; and to Virgil Aptolim of the Naval Research Laboratory Underwater Sound Reference Detachment for help in the hydrostatic measurements.
| Funders | Funder number |
|---|---|
| Office of Naval Technology |