| High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on （1-x）Pb(Zn1/3Nb2/3)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(Zn1/3Nb2/3)O3-xPbTiO3 single crystal substrate[J].中国物理 B,2014(11):550-555. |
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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： | Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology;Department of Physics, College of Electronic Science, Northeast Petroleum University;Materials Research Institute, The Pennsylvania State University, University Park |
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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(Zn1/3Nb2/3)O3-xPbTiO3(PZN-xPT) single crystal substrate with the carbon fibers parallel to the x1 and x2axes, respectively. The normalized maximum sensitivity Sfm λ maxexhibits an increasing tendency with the decrease of(h/λ)optand the maximum sensitivity Sfm λ maxincreases with the elastic constant cE66 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 x1 axis at λ = 24 μm, the maximum sensitivity Sfm maxcan reach as high as 1156 cm2/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： | gravimetric epoxy unidirectional waveguide normalized piezoelectric macroscopic quartz constants scaled |
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