Title :
Dielectric and pyroelectric properties of triglycerol-gelatin films
Author :
Damjanovic, D. ; Bhalla, A.S. ; Cross, L.E.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
Abstract :
The dielectric and pyroelectric properties of triglycerol-gelatin thick films were studied as a function of temperature and frequency. The films exhibited a strong dispersion in the dielectric permittivity accompanied by a high dielectric loss near room temperature. The pyroelectric current measured by the static Byer-Roundy method is heavily dominated by the thermally stimulated currents. Measurements performed on prepoled samples using the dynamic technique of A.G. Chynoweth (1956) clearly proved the presence of a true, reversible pyroelectric response in the examined films. The value of the pyroelectric coefficient of the films was found to be comparable to that of polyvinylidene fluoride (PVDF).<>
Keywords :
dielectric losses; gelatin; organic compounds; permittivity; pyroelectricity; thermally stimulated currents; dielectric permittivity; dielectric properties; dynamic technique; frequency dependence; high dielectric loss; prepoled samples; pyroelectric coefficient; pyroelectric current; pyroelectric properties; room temperature; static Byer-Roundy method; temperature dependence; thermally stimulated currents; triglycerol-gelatin thick films; Current measurement; Dielectric films; Dielectric losses; Dielectric measurements; Frequency; Performance evaluation; Permittivity measurement; Pyroelectricity; Temperature; Thick films;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
