Dielectric properties and ac electrical conductivity studies of MIS type Schottky diodes at high temperatures

2008 ◽  
Vol 85 (7) ◽  
pp. 1518-1523 ◽  
Author(s):  
A. Tataroğlu ◽  
İ. Yücedağ ◽  
Ş. Altindal
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
High Temperatures ◽  
Schottky Diodes ◽  
Ac Electrical Conductivity

scholarly journals Novel Pressure Sensors Made from Nanocomposites (Biodegradable Polymers–Metal Oxide Nanoparticles): Fabrication and Characterization

2018 ◽  
Vol 63 (8) ◽  
pp. 754 ◽  
Author(s):  
A. Hashim ◽  
A. Hadi
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
Low Cost ◽  
Metal Oxide Nanoparticles ◽  
Pressure Sensors ◽  
High Sensitivity ◽  
Oxide Nanoparticles ◽  
Ac Electrical Conductivity ◽  
Dc Electrical Conductivity ◽  
Pressure Sensitive

This paper aims to the preparation of novel pressure-sensitive nanocomposites with low cost, light weight, and good sensitivity. The nanocomposites of polyvinyl alcohol, polyacrylic acid, and lead oxide nanoparticles have been investigated. The dielectric properties and dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites have been studied. The dielectric properties of nanocomposites were measured in the frequency range (100 Hz–5 MHz). The experimental results showed that the dielectric constant and dielectric loss of (PVA–PAA–PbO2) nanocomposites decrease, as the frequency increases, and they increase with the concentrations of PbO2 nanoparticles. The ac electrical conductivity of (PVA–PAA–PbO2) nanocomposites increases with the frequency and the concentrations of PbO2 nanoparticles. The dc electrical conductivity of (PVA–PAA–PbO2) nanocomposites also increases with the concentrations of PbO2 nanoparticles. The application of pressure-sensitive nanocomposites has been examined in the pressure interval (60–200) bar. The results showed that the electrical resistance of (PVA–PAA–PbO2) pressure-sensitive nanocomposites decreases, as the compressive stress increases. The (PVA–PAA–PbO2) nanocomposites have high sensitivity to pressure.

AC electrical conductivity and dielectric properties of doping induced molecular ferroelectric diisopropylammonium bromide

2019 ◽  
Vol 6 (9) ◽  
pp. 096306
Author(s):  
Ekramul Kabir ◽  
M Khatun ◽  
Raihan J Mustafa ◽  
Kiran Singh ◽  
Muklesur Rahman
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
Ac Electrical Conductivity

AC CONDUCTIVITY AND DIELECTRIC PROPERTIES OF MANGANESE DOPED LAYERED Na1.89Li0.10K0.01Ti3O7 CERAMICS

2013 ◽  
Vol 28 (01) ◽  
pp. 1350200
Author(s):  
SHRIPAL SHARMA ◽  
RAKESH SINGH ◽  
GEETIKA
Keyword(s):  
Electrical Conductivity ◽  
Dielectric Properties ◽  
Chemical Synthesis ◽  
Loss Tangent ◽  
Relative Permittivity ◽  
Ac Electrical Conductivity ◽  
Conduction Mechanisms ◽  
Tan Δ ◽  
Electron Clouds ◽  
Derivatives Of

Manganese doped derivatives of polycrystalline Na 1.89 Li 0.10 K 0.01 Ti 3 O 7 bearing 0.01, 0.05 and 1.0 molar % of manganese have been prepared by chemical synthesis. The results of ac electrical conductivity studies in form of log (σT) versus 1000/T plots are reported in the frequency and temperature range of 10 kHz–1 MHz and 350–775 K, respectively. The corresponding plots have been divided into five temperature regions, I, II, III, IV and V. The various conduction mechanisms in different regions have been discussed. The nature of conductivity has been explained by proposing a model about the obtained conductivity σ(ω) which is the sum of three terms arising from three different mechanisms. Moreover, various Na–K–Li–O–Ti–O linkages in Na 2-x-y Li x K y Ti 3 O 7 materials may result special forms of electron clouds. Experimental results of the loss tangent ( tan δ) and relative permittivity (εr) versus temperature at different frequencies have been described. The results of tan δ and εr versus frequency plots at different temperature have also been given for these doped derivatives.

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