Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/583
Title: Poling of ferroelectric composites
Authors: Ploss, Beatrix
Ploss, Bernd
Shin, Franklin G.
Chan, Helen L. W.
Choy, Chung-loong
Subjects: Ceramic materials
Lead compounds
Nanostructured materials
Nonmetallic matrix composites
Piezoelectricity
Polarization
Pyroelectricity
Sensors
Vinyl resins
Volume fraction
Issue Date: 1999
Publisher: IEEE
Source: ISE 10 : 10th International Symposium on Electrets : 22-24 September 1999, European Cultural Centre of Delphi, Greece : proceedings, p. 489-492.
Abstract: In 0-3 nanocomposites of lead titanate (PT) in polivinylidenefluoride trifluoroethylene (PVDF-TrFE) it is possible to polarize the inclusions and the matrix separately. The pyroelectric coefficients of both components have the same sign, but the piezoelectric coefficients have the opposite sign. If matrix and inclusions of a composite of PT in PVDF-TrFE are polarized in the same direction, then the pyroelectric response of both components overlays constructively, the piezoelectric response destructively. By poling in opposite directions a material with reduced pyroelectric but increased piezoelectric sensitivity is produced. Under special poling conditions and for a certain ceramic volume fraction the pyroelectric coefficient vanishes completely for the antiparallel poled case but is piezoelectric with a piezoelectric coefficient of 20 pC/N. Such a material with internally compensated pyroelectricity is of high interest for the application in piezoelectric sensors were the cross sensitivity of piezoelectric sensors to temperature changes is often a large obstacle for their practical use.
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Type: Conference Paper
URI: http://hdl.handle.net/10397/583
ISBN: 0-7803-5025-1
Appears in Collections:MRC Conference Papers & Presentations
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