@article{Asaadi_Parhizkar_Bidadi_Aref_Ghafouri_2023, title={The effects of multiwall carbon nanotubes on the electrical characteristics of ZnO-based composites}, volume={14}, url={https://oiccpress.com/journal-of-theoretical-and-applied-physics/article/the-effects-of-multiwall-carbon-nanotubes-on-the-electrical-characteristics-of-zno-based-composites/}, DOI={10.1007/s40094-020-00389-y}, abstractNote={AbstractIn this experimental work, the effects of multiwall carbon nanotubes (MWCNTs) on electrical characteristics of zinc oxide–MWCNT–high-density polyethylene composite varistors have been investigated. All the samples were made at the temperature of 130 °C and pressure of 60 MPa by the hot-press method. Results show that increasing zinc oxide content in the mixture increases breakdown voltage up to 170 V, where the highest nonlinear coefficient (α ~ 13) corresponds to the samples with 95 wt% of ZnO. Results with regard to the effects of MWCNT as an additive reveal that increasing its content from 1 to 2.5% in the composites, the breakdown voltage decreases to 50 V, but the highest nonlinear coefficient (~ 14) corresponds to the sample with 1.5% of MWCNT content. It is also revealed that, heat treatment of the sample at a constant temperature of 135 °C and different time intervals from 2 to 10 h, the sample with 6 h annealing time shows maximum breakdown voltages (Vb = 140 V) with the highest nonlinear coefficient (~ 14). Investigation of the potential barrier height of samples shows a complete consistency with the breakdown voltage variations. The results have been justified regarding XRD patterns and SEM micrographs of samples.}, number={4}, journal={Journal of Theoretical and Applied Physics}, publisher={OICC Press}, author={Asaadi, N. and Parhizkar, M. and Bidadi, H. and Aref, S. Mohammadi and Ghafouri, M.}, year={2023}, month={Nov.}, keywords={ZnO, Composite varistor, Multiwall carbon nanotube, Nonlinear coefficient} }