Preparation and properties of cement based piezoelectric composites modified by CNTs
Preparation and properties of cement based piezoelectric composites modified by CNTs
复制标题
碳纳米管改性水泥基压电复合材料的制备及性能
DOI：
10.1016/j.cap.2010.10.021
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发表时间：
2011-05-01
影响因子：
2.4
通讯作者：
Che, Songwei
中科院分区：
文献类型：
--
作者：
Gong, Hongyu;Zhang, Yujun;Che, Songwei
在本研究中，以波特兰水泥为原料，添加70 vol.%的PZT粉末和0 ~ 1.3 vol.%的改性碳纳米管，制备了水泥基压电复合材料。CNTs作为导电填料分散在水泥基体中，提高了复合材料的极化效率，使极化过程可以在室温下进行，而不含CNTs的PZT/水泥复合材料需要120℃。CNTs的加入显著提高了复合材料的压电性能。当碳纳米管含量为0.3 vol.%时，CNTs/PZT/水泥复合材料的压电应变因子（d(33)）为62 pC/N，压电电压因子（g(33)）为60 × 10(-3) Vm/N，具有在智能土木工程结构中应用的潜力。(C) 2010 Elsevier B.V.版权所有
In this study, cement based piezoelectric composites have been prepared from Portland cement with the addition of 70 vol.% of PZT powders and various amounts of modified CNTs ranging from 0 to 1.3 vol.%. The CNTs act as a conductive filler dispersed in the cement matrix, improving the poling efficiency of the composites and enabling the poling process to be carried out at room temperature, in contrast to the 120 degrees C required for the PZT/cement composites without CNTs. The addition of CNTs significantly enhanced the piezoelectric properties of the composites. With a CNT content of 0.3 vol.%, the CNTs/PZT/cement composite showed the highest piezoelectric strain factors (d(33)) of 62 pC/N and piezoelectric voltage factors (g(33)) 60 x 10(-3) Vm/N, which are the promising characteristics for its potential use in the smart civil engineering structures. (C) 2010 Elsevier B.V. All rights reserved.