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Faculty of Sciences
Document Details
Document Type
:
Article In Journal
Document Title
:
Frequency Dependent Dielectric and I-V Properties of Polyaniline/Ta2O5 Composites
Frequency Dependent Dielectric and I-V Properties of Polyaniline/Ta2O5 Composites
Subject
:
physics
Document Language
:
English
Abstract
:
Polyaniline - Ta2O5 composites were synthesized by in situ polymerization technique at 0 to 5 degrees temperature. The prepared composites were characterized by FTIR for structural study and surface morphologies analyzed by scanning electron microscopy (SEM). The important peaks such as benzenoid, quinoid rings and MO stretching confirms the formation of composites. SEM image shows that the grain size increases with increase in tantalum pentaoxide concentration in polyaniline. In DC conductivity 30 wt% shows maximum conductivity of 8.27 x 10(-2) S/cm due to the hopping of polorans and bipolorans through polymer chain. Further the AC conductivity was carried out by Kelvin two probe methods and found that conductivity depends on the applied frequency as well as concentration of Ta2O5. From the dielectric studies, it is observed that 20wt% shows the lowest dielectric constant due to the lower bulk resistance as a result conductivity enhances up to 0.86 S/cm. The J-V characteristics show the maximum current of 1.4 x 10(-3) Amp by applying a bias of +/- 5 volt.
ISSN
:
0731-5171
Journal Name
:
FERROELECTRICS LETTERS SECTION
Volume
:
42
Issue Number
:
4-6
Publishing Year
:
1435 AH
2015 AD
Article Type
:
Article
Added Date
:
Wednesday, August 16, 2017
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
Omar A Al-Hartomy
Al-Hartomy, Omar A
Investigator
Doctorate
oalhartomy@hotmail.co.uk
Files
File Name
Type
Description
42649.pdf
pdf
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