| High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on （1 -- x）Pb（Znl/3Nb2/3）O3-xPbTiO3 single crystal substrate |
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| 引用本文： | 黄乃兴,;吕天全,;张锐,;曹文武.High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on （1 -- x）Pb（Znl/3Nb2/3）O3-xPbTiO3 single crystal substrate[J].中国物理 B,2014(11):546-551. |
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| 作者姓名： | 黄乃兴 ;吕天全 ;张锐 ;曹文武 |
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| 作者单位： | [1]Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology, Harbin 150080, China; [2]Department of Physics, College of Electronic Science, Northeast Petroleum University, Daqing 163318, China; [3]Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA |
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| 基金项目： | Project supported by the National Basic Research Program of China （Grant No. 2013CB632900）. |
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| 摘 要： | We have derived a general formula for sensitivity optimization of gravimetric sensors and have used it to design a high sensitivity gravimetric sensor using unidirectional carbon fiber epoxy composite （CFEC） waveguide layer on （1 -x）Pb（Znl/3Nbz/3）O3-xPbTiO3 （PZN-xPT） single crystal substrate with the carbon fibers parallel to the xj and x2 axes, respectively. The normalized maximum sensitivity （｜sfm｜λ）max exhibits an increasing tendency with the decrease of （h/λ）opt and the maximum sensitivity （｜sfm｜λ）max increases with the elastic constant c6E6 of the piezoelectric substrate material. For the CFEC/011]c poled PZN-7%PT single crystal sensor configuration, with the carbon fibers parallel to the xa axis at λ = 24 ktm, the maximum sensitivity ｜sfm｜max can reach as high as 1156 cmZ/g, which is about three times that of a traditional SiO2/ST quartz structure gravimetric sensor. The better design selection is to have the carbon fibers parallel to the direction of propagation of Love wave in order to obtain the best sensitivity.
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| 关 键 词： | 碳纤维环氧复合材料 高灵敏度 重量传感器 环氧树脂复合材料 单晶 衬底 单向 重力传感器 |
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