Structure, Dielectric Properties and AC Behavior of Commercial Polytetrafluroethylene (PTFE) Polymer

Direct quantum-mechanical calculation of theoretical spectra of complex dielectric permittivity allows exact defining of proton tunneling influence on frequency and temperature

The real and imaginary parts of the relative permittivity are now parallel, indicative of what Jonscher [6] termed a “low- frequency dispersion (LFD)” or what Dissado

The imaginary part of permittivity or dielectric loss (ε") is obtained from the value ofdissipation factor D.Dielectric loss (ε") versus frequency is shown in fig.4

From figure 5, dielectric constant is observed to be high at lower frequency and it systematically decreases with increasing frequency up to 600 kHz and then after it

Figure 6: Plot of the relative permittivity (a) and dielectric loss (b) as a function of temperature showing a frequency dispersion at low temperature.. log f) at

It is observed that both dielectric constant and dielectric loss decreases sharply with the increase in frequency in the low frequency region and remains almost constant

The frequency dependence of the relative permittivity and dielectric loss of BCZT were measured at room temperature for the different porosity levels, and are presented in Figure

Small signal mean relative dielectric permittivity of polycrystalline PZT 20/80-STO multilayer as functions of T G and STO layer fraction on Si. and