Title :
Optimized pyroelectric properties of 0-3 composites of PZT particles in polyurethane doped with lithium perchlorate
Author :
Ploss, Bernd ; Krause, Markus
Author_Institution :
Univ. of Appl. Sci. (FH) Jena, Jena
fDate :
12/1/2007 12:00:00 AM
Abstract :
A substantial improvement in the performance of pyroelectric 0-3 composites of ceramic particles in a polymer matrix has been achieved by doping the polymer matrix material. Readily prepared and polarized films with various volume fractions of lead zirconate-titanate (PZT) particles in polyurethane have been doped in a solution of lithium perchlorate in acetone to increase the conductivity. With an appropriate conductivity, the dielectric permittivities of the ceramic particles and the polymer matrix become matched, resulting in an improvement of the pyroelectric coefficient from about 6 muC/(m2K) to about 50 muC/(m2K). The experimental results are explained by theoretical predictions.
Keywords :
composite materials; electrical conductivity; ferroelectric ceramics; lead compounds; permittivity; polymer films; pyroelectricity; ceramic particles; conductivity; dielectric permittivities; doping; films; polymer matrix; polyurethane; pyroelectric coefficient; pyroelectric composites; volume fractions; Ceramics; Composite materials; Conducting materials; Conductivity; Dielectric materials; Doping; Lithium compounds; Polarization; Polymers; Pyroelectricity; Electric Conductivity; Electrochemistry; Equipment Design; Equipment Failure Analysis; Heat; Lead; Lithium Compounds; Materials Testing; Microelectrodes; Microspheres; Perchloric Acid; Polyurethanes; Quality Control; Reproducibility of Results; Sensitivity and Specificity; Titanium; Transducers; Ultrasonography; Zirconium;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
DOI :
10.1109/TUFFC.2007.563
