Porous, functionally gradient pyroelectric materials
Date
2007-01
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Volume Title
Publisher
Blackwell Publishing
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Type
Article
ISSN
0002-7820
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Free to read from
Citation
Shaw CP, Whatmore RW, Alcock JR. (2007) Porous, functionally gradient pyroelectric materials. Journal of the American Ceramic Society, Volume 90, Issue 1, pp. 137–142
Abstract
Properties of a new type of pyroelectric ceramic structure containing a layer of known porosity laminated between two dense layers, to form a functionally gradient material (FGM), are reported. The combination of theoretical models for pyroelectric, dielectric, and thermal properties gave a model for the pyroelectric voltage figure of merit (FV) in good agreement with experiment, which had shown a 20% improvement for an introduced central layer porosity of 27%. Preliminary pyroelectric responsivity measurements on FGM infrared detectors indicated an even better improvement. It is postulated that this is due to the porous layer acting as a thermal barrier in the structure.
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The definitive version is available at www.blackwell-synergy.com