Influence of DC Bias on the Properties of the Piezoelectric Material

Abstract:

According to the resonant characteristics of piezoelectric materials, in order to get the parameters of piezoelectric materials under DC bias voltage by calculate the impedance spectrum of piezoelectric materials, and the changes of the parameters of piezoelectric materials under DC bias were discussed. This paper measured the impedance spectrum of piezoelectric materials under different DC bias voltage with TH2828S Impedance Analyzer, and found that DC bias voltage made the material impedance spectrum drifted. Various parameters of materials were calculated by the resonance method, it was found that the parameters of piezoelectric materials under varied bias voltage were different, and the behaviours of each parameters under DC bias voltage were obtained.It was consider that the elastic constant and dielectric constant were changed due to the inverse piezoelectric effect of the piezoelectric materials which were under DC bias voltage,so that other parameters were changed.Then the resonant frequent formula of piezoelectric materials under DC bias voltage was deduced.

• Periodical: Materials Science Forum (Volume 852)
• Pages: 164-170
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.852.164
• Online since: April 2016
• Authors: Kang Le*, Yu Jun Feng
• Keywords: DC Bias Voltage, Dielectric Constant, Elastic Constant, Impedance Spectrum, Performance Changes

References

[1] Wang Chunlei, Li Jichao, Zhao Minglei, Piezoelectric And Ferroelectric Physics. Science Press , Beijing, 2009, pp.112-123.

[2] Zhang Liangyin, Yao Xi 2006, Dielectric Physics. Xi'an Jiaotong University Press, Xi'an, 2009, pp.142-161.

[3] Luan Guidong，Zhang Jinze，Wang Renqian. Piezoelectric transducer and transducer array, revised edition. Beijing University Press, Beijing, 2005. 7, pp.107-120.

[4] Kittel C. Introduction to solid physics, the eighth edition. Chemical Industry Press, Beijing, 2005, pp.174-175.

[5] Huang Naixing. Dimension-effect of piezoelectric crystal material influence on macroscopical electromechanical properties. Harbin Institute of Technology, Harbin, (2008).

[6] Wu YongXin. Study on the dielectric constant conversion mechanism ofdual-frequency liquid crystal. Hebei University of Technology, Hebei, (2009).