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Structural, dielectric and electrical characterization of (Co)x(Ni/bentonite) composites

التفاصيل البيبلوغرافية
العنوان: Structural, dielectric and electrical characterization of (Co)x(Ni/bentonite) composites
المؤلفون: Abdullah A. Alotaibi, T. A. Abdel-Baset, Ali H. Bashal
المصدر: Journal of Taibah University for Science, Vol 14, Iss 1, Pp 1193-1200 (2020)
بيانات النشر: Taylor & Francis Group, 2020.
سنة النشر: 2020
المجموعة: LCC:Science (General)
مصطلحات موضوعية: bentonite, ni–co, dielectric properties, conductivity, Science (General), Q1-390
الوصف: Based on commercial bentonite (bento) and two metal precursors, including NiCl2 and CoCl2, diverse series of composites were prepared by incipient wet impregnation. The prepared composites were characterized by X-ray diffraction, scanning electron microscopy and energy-dispersive X-Ray spectroscopy. X-ray diffraction studies show that the crystallite size decreased as increasing the wt. % of cobalt. Moreover, the presence of Co in the EDX spectra for all bento concentrations, suggests its successful incorporation and probably the formation of Ni–Co oxide. The dielectric constant ε′, the dielectric modulus (M′, M′′) and the ac conductivity (σac) were also studied. It was found that ε′ decreases with frequency in all samples, a clear dielectric α relaxation observed from dielectric loss M′′. σac decreases by increasing Co content and the conduction mechanism is correlated barrier hopping (CBH). σac(T) is thermally activated and the activation energy Ea decreased with increasing Co content.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1658-3655
16583655
Relation: https://doaj.org/toc/1658-3655
DOI: 10.1080/16583655.2020.1809200
URL الوصول: https://doaj.org/article/5690a9301da04c769e8911ae9bc052c0
رقم الأكسشن: edsdoj.5690a9301da04c769e8911ae9bc052c0
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:16583655
DOI:10.1080/16583655.2020.1809200