1 April 2015 Effect of carbon nanotubes on properties of cement-sand-based piezoelectric composites
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Carbon Nanotubes (CNTs) were dispersed in a cement-sand-based piezoelectric smart composite as conductive fillers to improve its poling efficiency, leading to a desirable piezoelectric effect. By introducing a small amount of CNTs, continuous electric networks between Lead Zirconate Titanate (PZT) particles were created, thus making the composite poling easier. Specimens were prepared by mixing PZT powders, Portland cement and sand with CNTs, followed by pressing it with a load frame system. The effect of quantity of CNTs ranging from 0 to 1.0 volume percent on properties of the composite, including its piezoelectric coefficient, dielectric constant and loss, and sensing effects, were characterized. It was found that the addition of CNTs facilitated effective poling at room temperature and improved the piezoelectric and dielectric properties of the composite. The composite modified by CNTs achieved optimal properties when the CNTs content was 0.7 vol.%.
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Sunjung Kim, Sunjung Kim, Ping Zhao, Ping Zhao, Emmanuel Enemuoh, Emmanuel Enemuoh, "Effect of carbon nanotubes on properties of cement-sand-based piezoelectric composites", Proc. SPIE 9432, Behavior and Mechanics of Multifunctional Materials and Composites 2015, 943208 (1 April 2015); doi: 10.1117/12.2083854; https://doi.org/10.1117/12.2083854

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