Thick film polymer-ceramic composites for pyroelectric applications

被引：0
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作者：
Dietze, M. [1 ]
Krause, J. [1 ]
Solterbeck, C.-H. [1 ]
Es-Souni, M. [1 ]
机构：
[1] Institute of Materials and Surface Technology, University of Applied Science Kiel, Grenzstr. 3, 24149 Kiel, Germany
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| 1600年 / American Institute of Physics, 2 Huntington Quadrangle, Suite N101, Melville, NY 11747-4502, United States卷 / 101期
关键词：
Thick films of 0-3 composites of lead-zirconate-titanate ceramic and polyvinylidene-trifluorethylene copolymer have been produced by spin coating on gold-coated silicon wafers. The dielectric properties were investigated as a function of ceramic volume fraction and temperature. Pyroelectric measurements were undertaken by temperature modulation with a Peltier element. Additionally; the pyroelectric response has been investigated up to 3000 Hz using a modulated laser. The piezoelectric response of the composites obtained by using a laser vibrometer are also reported. It is shown that the dielectric constant increases with increasing volume fraction of ceramic and that it reaches a maximum at a temperature in the range of 65-70 °C due to the ferroelectric-paraelectric phase transition of the polymer matrix. The pyroelectric coefficient increases to 92 μC m-2 K-1 at a ceramic volume fraction of 20%. Furthermore the effective piezoelectric charge coefficient d33 of the composite almost vanishes at this composition. This composites show relatively high pyroelectric figures of merit and may be a potential candidate for pyroelectric sensor applications. © 2007 American Institute of Physics;
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