Title :
Optimized pyroelectric 0-3 composites of PZT particles in doped polyurethane
Author :
Ploss, B. ; Krause, M.
Author_Institution :
Univ. of Appl. Sci., Jena
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 40 muC/(m2K) at modulation frequencies around 50 Hz. The experimental results are explained by theoretical predictions.
Keywords :
composite materials; doping; electrical conductivity; lead compounds; permittivity; polymers; pyroelectricity; titanium compounds; zirconium compounds; PZT; acetone; ceramic particles; conductivity; dielectric permittivity; doping; lead zirconate-titanate particles; lithium perchlorate; polymer matrix; polyurethane; pyroelectric coefficient; pyroelectric composites; Ceramics; Composite materials; Conducting materials; Conductive films; Conductivity; Dielectric materials; Doping; Polarization; Polymers; Pyroelectricity;
Conference_Titel :
Applications of Ferroelectrics, 2007. ISAF 2007. Sixteenth IEEE International Symposium on
Conference_Location :
Nara
Print_ISBN :
978-1-4244-1334-8
Electronic_ISBN :
1099-4734
DOI :
10.1109/ISAF.2007.4393412
