Experimental study on use of nickel powder-filled Portland cement-based composite for fabrication of piezoresistive sensors with high sensitivity
Experimental study on use of nickel powder-filled Portland cement-based composite for fabrication of piezoresistive sensors with high sensitivity
复制标题
镍粉填充硅酸盐水泥基复合材料制作高灵敏度压阻传感器的实验研究
DOI：
10.1016/j.sna.2008.10.001
复制
发表时间：
2009-01-15
影响因子：
4.6
通讯作者：
Ou, J. P.
中科院分区：
文献类型：
--
作者：
Han, B. G.;Han, B. Z.;Ou, J. P.
在常规硅酸盐水泥基材料中添加镍粉作为功能填料制备镍粉填充硅酸盐水泥基复合材料，并通过在镍粉填充硅酸盐水泥基复合材料中嵌入四个环形电极制作压阻传感器。针对压应力建立了电阻率的分数变化与压阻传感器的应力/应变之间的关系，并发现该关系在 0 至 12.5 MPa 的范围内。实验结果表明，单轴压缩下镍粉填充波特兰水泥基复合材料的电阻率在弹性范围内降低了62.6144%，这证明了使用该复合材料来制造对应力和应变（应变系数）具有高敏感性的压阻传感器是合理的。压阻式传感器对压应力的灵敏度高于0.050092 MPa-1，最高可达0.123648 MPa-1。压阻式传感器的应变系数高于895.450，最高可达1929.500。由此得出结论，新开发的压阻传感器对应力/应变具有较高的灵敏度，可用于应力/应变或力/变形的测量。 Crown 版权所有 (C) 2008 由 Elsevier B.V. 出版。保留所有权利。
Nickel powder-filled Portland cement-based composite was prepared by adding nickel powder as functional filler into conventional Portland cement-based materials, and piezoresistive sensors were fabricated by embedding four loop electrodes in the nickel powder-filled Portland cement-based composite. The relationship between the fractional change in electrical resistivity and the stress/strain of piezoresistive sensors was established for the compressive stress and was found to be in the range from 0 to 12.5 MPa. Experimental results indicate that the electrical resistivity of nickel powder-filled Portland cement-based composite under uniaxial compression decreases by 62.6144% within elastic regime, which justifies the use of this composite in the fabrication of piezoresistive sensors with high sensitivity to stress and sensitivity to strain (gauge factor). The sensitivity of piezoresistive sensors to compressive stress is higher than 0.050092 MPa-1 and goes up to 0.123648 MPa-1. The gauge factor of piezoresistive sensors is higher than 895.450 and goes up to 1929.500. It is therefore concluded that the newly developed piezoresistive sensors have a high sensitivity to stress/strain, and they can be used for measurement of stress/strain or force/deformation. Crown Copyright (C) 2008 Published by Elsevier B.V. All rights reserved.