Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/12285
Title: Pyroelectric sensors with reduced vibration sensitivity
Authors: Ploss, B
Fung, WM
Chan, HLW 
Choy, CL 
Keywords: Composites
Piezoelectric
PT
PVDF-TrFE
Pyroelectric sensors
Issue Date: 2001
Publisher: Taylor & Francis Inc.
Source: Ferroelectrics, 2001, v. 263, no. 1, p. 229-234 How to cite?
Journal: Ferroelectrics 
Abstract: To achieve a substantial reduction of microphony in pyroelectric sensors we are proposing to replace the homogeneous pyroelectric material by a composite. The pyroelectric coefficients of polyvinylidene fluoride-trifluoroethylene copolymer (PVDF-TrFE) and perovskites like lead titanate (PT) have the same sign, while their piezoelectric coefficients d33 and d31 have opposite signs. When a ferroelectric composite is prepared by dispersing PT particles in a PVDF-TrFE matrix and the inclusions and matrix are polarized in the same direction, their pyroelectric signals reinforce while their piezoelectric signals partially or completely cancel out. Pyroelectric sensors have been fabricated by depositing this composite material on a polyimide membrane. It is demonstrated that the composite sensors show substantially lower microphony than PVDF-TrFE sensors.
URI: http://hdl.handle.net/10397/12285
ISSN: 0015-0193
EISSN: 1563-5112
DOI: 10.1080/00150190108225204
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