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Iranian Journal of Materials Science and Engineering، جلد ۱۵، شماره ۴، صفحات ۰-۰
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چکیده فارسی مقاله
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عنوان انگلیسی Dielectric Poperties and AC Conductivity Studies of PTh-Co Nanocomposites
چکیده انگلیسی مقاله Polythiophene (PTh) and cobalt nanoparticles (Co-nps) were prepared by chemical oxidation and modified polyol processes respectively. Composites were made by mixing them in the proportions, PTh1-xCox; x = 0.1, 0.2, 0.3, 0.4, 0.5.  Morphology of the samples has been studied by SEM technique. Dielectric properties with temperature and frequency as variables were investigated. Dielectric constant and loss factor decreased with frequency and increased with temperature. AC conductivity was estimated from the dielectric data. Ac conductivity decreased with increase of Co-nps in the composites which indicates that electrically insulating effect has been induced by Co-nps. Small polaron hopping mechanism is found to be the conduction mechanism operated. Activation energy for ac conduction decreased with increase of frequency and weight percent of Co-nps in the composites.  Electric modulus was determined and its analysis leads to the estimation of dielectric relaxation time. Relaxation time decreased with increase of temperature for all the five composites. For the first time PTh-Co nanocomposites have been reported for dielectric properties and ac conductivity as a function of frequency and temperature.
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نویسندگان مقاله | G. Chandraprabha
Gulbarga University


| T. Sankarappa
Gulbarga University


| T. Sujatha
Governemnt Higher Primary School
نشانی اینترنتی http://ijmse.iust.ac.ir/browse.php?a_code=A-10-1453-1&slc_lang=en&sid=1
فایل مقاله اشکال در دسترسی به فایل - ./files/site1/rds_journals/454/article-454-937254.pdf
کد مقاله (doi)
زبان مقاله منتشر شده en
موضوعات مقاله منتشر شده گروه فیزیکی و عملیات حرارتی
نوع مقاله منتشر شده Research paper
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