›› 2014, Vol. 23 ›› Issue (11): 117704-117704.doi: 10.1088/1674-1056/23/11/117704

• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇    下一篇

High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on (1-x)Pb(Zn1/3Nb2/3)O3- xPbTiO3 single crystal substrate

黄乃兴a b, 吕天全a, 张锐a, 曹文武a c   

  1. a Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;
    b Department of Physics, College of Electronic Science, Northeast Petroleum University, Daqing 163318, China;
    c Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
  • 收稿日期:2014-04-23 修回日期:2014-05-19 出版日期:2014-11-15 发布日期:2014-11-15
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No. 2013CB632900).

High sensitivity gravimetric sensor made of unidirectional carbon fiber epoxy composite on (1-x)Pb(Zn1/3Nb2/3)O3- xPbTiO3 single crystal substrate

Huang Nai-Xing (黄乃兴)a b, Lü Tian-Quan (吕天全)a, Zhang Rui (张锐)a, Cao Wen-Wu (曹文武)a c   

  1. a Condensed Matter Science and Technology Institute, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;
    b Department of Physics, College of Electronic Science, Northeast Petroleum University, Daqing 163318, China;
    c Materials Research Institute, The Pennsylvania State University, University Park, Pennsylvania 16802, USA
  • Received:2014-04-23 Revised:2014-05-19 Online:2014-11-15 Published:2014-11-15
  • Contact: Lü Tian-Quan, Zhang Rui E-mail:ltq@hit.edu.cn;ruizhang_ccmst@hit.edu.cn
  • Supported by:
    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(Zn1/3Nb2/3)O3-xPbTiO3 (PZN-xPT) single crystal substrate with the carbon fibers parallel to the x1 and x2 axes, respectively. The normalized maximum sensitivity (|Smf|λ)max exhibits an increasing tendency with the decrease of (h/λ ight)opt and the maximum sensitivity (|Smf|λ)max increases with the elastic constant c66E 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 |Smf|max can 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.

关键词: Love wave, gravimetric sensor, ferroelectric single crystal, sensitivity optimization

Abstract: 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 x2 axes, respectively. The normalized maximum sensitivity (|Smf|λ)max exhibits an increasing tendency with the decrease of (h/λ ight)opt and the maximum sensitivity (|Smf|λ)max increases with the elastic constant c66E 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 |Smf|max can 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.

Key words: Love wave, gravimetric sensor, ferroelectric single crystal, sensitivity optimization

中图分类号:  (Dielectric, piezoelectric, ferroelectric, and antiferroelectric materials)

  • 77.84.-s
52.35.Mw (Nonlinear phenomena: waves, wave propagation, and other interactions (including parametric effects, mode coupling, ponderomotive effects, etc.)) 77.65.Dq (Acoustoelectric effects and surface acoustic waves (SAW) in piezoelectrics) 07.07.Df (Sensors (chemical, optical, electrical, movement, gas, etc.); remote sensing)