TY - GEN
T1 - Porous, functionally gradient pyroelectric materials
AU - Shaw, Christopher P.
AU - Whatmore, Roger W.
AU - Alcock, Jeffrey R.
PY - 2007/1
Y1 - 2007/1
N2 - 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.
AB - 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.
UR - https://www.scopus.com/pages/publications/33846175713
U2 - 10.1111/j.1551-2916.2006.01373.x
DO - 10.1111/j.1551-2916.2006.01373.x
M3 - Other output
AN - SCOPUS:33846175713
VL - 90
T3 - Journal of the American Ceramic Society
ER -