کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1484737 | 991642 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Debye type dielectric relaxation in carbon nano-balls' and 4-DMAABCA acid doped E7 coded nematic liquid crystal
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
The electrical properties of carbon nano-balls' and 4-dimethylaminoazobenzene-2â²-carboxylic acid doped dispersed nematic liquid crystal composite were investigated by impedance spectroscopy technique. The conductivity and capacitance were measured in the frequency range 100Â kHz-1Â MHz and temperature range 300-380Â K. The loss peak was observed in the dielectric loss spectra and was identified as nearly-Debye type relaxation. Cole-Cole plots have been used to describe the characteristic changes of electrical properties in mentioned temperature interval. The sample presents monodispersive relaxation behavior with a relaxation time of â¼10â7Â s. The relaxation process is attributed to the dipolar rotation of the long molecular axis and the activation energy is found to be 0.097Â eV.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 30, 15 July 2008, Pages 3525-3528
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 30, 15 July 2008, Pages 3525-3528
نویسندگان
E. Åentürk, M. Okutan, S.E. San, O. Köysal,