Properties of cement
By Zhao, Ping; Wang, Shifa; Kadlec, Alec; Li, Zhaodong; Wang, Xudong
Published in Ceramics International
NULL
2016
Abstract
Abstract Carbon nanotubes (CNTs) were dispersed in a cement-sand-based piezoelectric composite as conductive fillers to improve its poling efficiency. Specimens were prepared by mixing {PZT} powders, cement and sand with CNTs. The effect of {CNTs} ranging from 0 to 0.9 vol% on properties of the composite, including its piezoelectric coefficient, dielectric constant and loss, and sensing characteristic, were characterized. It was found that the addition of {CNTs} facilitated effective poling under a low electric field of 1 MV/m 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 0.6 vol% and this was verified by the investigation of sensing effects of the composite through compressive tests.
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