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New Resistive Switching and Self-Regulating Heating in Foliated Graphite/Nickel Polyvinyl Chloride Nanocomposites
Faculty
Science
Year:
2011
Type of Publication:
Article
Pages:
Authors:
Al-Ghamdi, A. A, Al-Hartomy, Omar A, Al-Ghamdi, Attieh A, Daiem, A. M. Abdel, El-Tantawy, Farid, Al-Salamy, Falleh
DOI:
10.1155/2011/694879
Journal:
JOURNAL OF NANOMATERIALS HINDAWI PUBLISHING CORPORATION
Volume:
Research Area:
Science \& Technology - Other Topics; Materials Science
ISSN
ISI:000298427700001
Keywords :
, Resistive Switching , Self-Regulating Heating , Foliated Graphite/Nickel
Abstract:
Polyvinyl chloride-(PVC-) based nanocomposites containing nanosized graphite and nickel nanoparticles (GN) as conductive fillers to achieve positive temperature coefficient of resistance (PTCR) thermistors and self-regulating heater function have been successfully fabricated. The microstructure of the foliated graphite and nanocomposites was examined by scanning electron microscopy (SEM). The effect of GN content on the static electrical conductivity, carrier's mobility, and number of charge carriers of the nanocomposites was studied. The applicability of nanocomposites as PTCR thermistors was examined by monitoring the conductivity as a function of temperature. It is found that the conduction mechanism in PVC/GN nanocomposites is governed by tunneling mechanism. Also, the applied voltage versus current and temperature were studied to check the applicability of composites as self-regulating heater. The results show that the PVC/GN nanocomposites might have potential applications in PTCR devices, self-regulating heater, and temperature sensors.
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