In this work, the effect of electric permittivity and thin layer thickness on the energy
gape has been studied in a system consisting of three thin layers by means of finding the
self action potential of charge carrier located in the central layer
of this system. Then, the
self action potential energy has been found by solving Schrödinger equation at the
extracted potential. This study shows that energy gape of PbI2 decreases with layer
thickness while it increases/decreases according to comparison between dielectric
permittivity values of central layer and counterparts of two neighborhood layers on both sides.
Landau,s – Silin Semi Kinetic Equation has been solved by this scientific paper.
After taking into consideration the mutual effect between quasi particles in Fermi's Plasma
under a magnetic field to get more accurate results related to coming up wi
th some
characteristics of this sphere. Like the conductivity and dielectric coefficient due to their
necessity in the plasma's characteristic study depending on Landau's parameters and
comparing them to the results of other ways for these parameters to be calculated.
Ceramic Sample of tin doped pure barium titanate prepared by solid-state reaction at
a sintering temperature of 1350˚C for 3.5h. The electrical properties of ceramic BaTi1-
xSnxO3 studied for the ratios (x= 0, 0.05, 0.07, 0.1, 0.12, 0.15, 0.17), as
a function of
temperature from 0˚C to 170˚C at 1kHz. The maximum value of the dielectric constant
reached to έ=6568 for the content x=0.1 at the temperature Tc=50˚C. The phase transition
for barium titanate was of the first type with γ=1.07. The degree of the transition changed
by increase the ratio of added tin. Where the maximum value of transition degree γ=1.46 at
the ratio x=0.15. Curie constant decreases with increasing ratios of tin added to the ceramic
samples.
Ceramic samples of calcium doped barium titanate have been prepared from highpurity
raw materials by using solid-state reaction method at a sintering temperature of
1350˚C for 3.5h. The electrical properties of ceramic samples Ba1-xCaxTiO3 have bee
n
studied for the ratios (x = 0, 0.1, 0.3, 0.5, 0.7, 1), as a function of temperature within the
range of 25˚C to 220˚C at the frequency 1kHz. Experimental results show that the Currie
point moved within the temperature range from 120˚C to 150˚C by change of calciumadded
ratios. Dielectric constant decreases by increasing the calcium-added ratios. The
maximum value of the dielectric constant rached to έ=6898.85 for barium titanate at the
temperature Tc = 132˚C. We got the high values of the tangent loss angle at both ends of
the studied temperature range. Curie constant decrease of the samples by increasing the
additional calcium ratios.
This work includes study of Co Zn-ferrite samples doped by Ni which prepared by Ceramic method. Then verified that it had spinel structure by using XRD. In addition we study properties such as electrical resistivity , electrical conductivity , dielec
tric constant and loss coefficient. And also we have studied variations of this properties in terms of temperature at different frequencies in the range of (20 -105) Hz.
This study focuses on studying the effects of Electric Field of deferent
frequencies (20Hz – 3MHz), on RBCs after being irradiated by (690μW) of He-
Ne Laser, with testing some blood characteristics like osmotic fragility,
Conductivity and Dielectric constant.
A series of polymer blends are prepared by sequential mixing of epoxy resin
EP with polyurethane PU. The effect of different amount of polyurethane 10%,
20%and 30% wt fraction on conduction and dielectric relaxation has been
reported. It was found
that all blends showed three activation energies (Eac) at
all frequencies, and the glass transition temperature (Tg) was increased with
PU wt fraction. The exponent s values were estimated to be less than unity for
all blends. Cole-Cole diagram was used to evaluate the polarizability (α),
molecular relaxation time (τ) and optical dielectric constant (εOP). The
thermodynamic parameters also determined, the result showed that the Gibbs
free energy of activation (ΔG) and enthalpy (ΔH) are high for all blends.
