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Abstract
The present investigation deals with the effects of the (gamma) γ-radiation and samples’ aging on the ac electrical properties of ultrafine iron polystyrene composites. The composites with an average thickness of 1.07 mm contain different iron particle concentrations (10, 20 and 30) by weight %. The results show that the ac electrical properties of the γ-irradiated composites are different from the non-irradiated ones. Rather relative changes in values after irradiation were registered for the impedance, dielectric constant, and the ac electrical conductivity. After irradiation, both the conductivity and the dielectric constant are enhanced relatively with the impedance becoming relatively lower in value. Also, the results show that the age of the samples affects the ac electrical properties of the tested composites. It has been found that after a few years, the electrical conductivity of the composites becomes lower in value compared to what it was a few years ago, which indicates that composites tend to lose their desired electrical properties with passage of time. So, as a potential solution for this physical behavior, the samples were exposed to γ-radiation in an attempt to enhance the metal–polymer bonding and release more free electrons within the composites. The properties such as impedance, dielectric constant, electrical conductivity of the composites were studied before and after γ-irradiation. Later, these studied electrical properties were compared with results reported few years ago. The frequency range applied in this study is consistent with Jonscher’s power law model.
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No potential conflict of interest was reported by the authors.
Additional information
Notes on contributors
Batool A. Abu Saleh
Batool A. Abusaleh has a Ph.D. in Physics from the Department of Physics at the University of Jordan in 2018. She is currently Assistant Professor in Physics, in Al-Balqa applied University. She has experience in Synthesis and Characterization of Pure and Doped Materials and their Physical Properties.
Ziad M. Elimat
Ziad M. Elimat has a Ph.D. in Physics from the Department of Physics at the University of Jordan in 2005. He is currently a Full Professor at the Al-Balqa applied University. He has experience in Physics of Materials, Physical properties, and Mechanical.
Ruba I. Alzubi
Ruba I. Al-Zubi received her MS degree at the Department of Physics of University of Jordan in 2008. Her research interest is Material Science. She is a Ph.D. candidate working with Prof. Hassan Al-Juwhari in the University of Jordan.
Hassan K. Juwhari
Hassan K. Al-Juwhari has received his Ph.D. in Materials from the Pennsylvania State University in 2000. Currently he is a full Professor in Physics at the University of Jordan. He has long experience in Synthesis and Characterization of Pure and Doped Materials with particular interest in Structural, Optical, Thermal, and Electrical Properties of Materials.
Awwad M. Zihlif
Awwad M. Zihlif has Ph.D. in Physics of Materials. Received from Leeds University- England in 1973. He has an Accumulated extensive experience in the Physics and Properties of Materials. He supervised many graduated students in his career. He remains very active in research after his retirement as a professor from the physics Department of the University of Jordan.