Characterisation of piezoelectric materials at high stress levels using electrical impedance analysis

Bowles, Adrian; Gore, J.G.

doi:10.1117/12.776331

Cited by 1 publication

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Considering the experiment in practice, the electrical excitation voltage was kept low (<1 V) so the elongation of the stack and the additional dynamic forces generated by electrical excitation were insignificant in comparison with the preloading force applied by the mechanical structure [11], hence, the dynamic forces can then be neglected and the static preloading force becomes the principal influence on the equivalent electrical admittance [24]. More experimental measures to eliminate the influence of dynamic forces will be illustrated in section 2.…”

Section: Admittance Of the Piezoelectric Stack Under Preloadmentioning

confidence: 99%

“…The most conventionally used technique for measuring the piezoelectric material properties is the resonance method, which is outlined in IEEE Standard 176 [8], it is performed at the resonant and anti-resonant frequency of the piezoelectric sample, and the material properties of piezoelectric stack also can be determined by using this method [9]. For valid analyses, however, the conventional resonance method demands that the piezoelectric stack under analysis must be free to vibrate [10,11]. It is due to the theoretical model of the method, which is based on a piezoelectric stack under free boundary condition without any external mechanical load [9].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Design, experiment and verification of a refined resonance method for property measurement of piezoelectric stack

Shen

Chen

2018

Smart Mater. Struct.

View full text Add to dashboard Cite

A refined resonance method, which is based on the theoretical model of a piezoelectric stack under constraint boundary condition is developed and proposed to measure the properties of piezoelectric stack which are relevant to the prestress. The method can transcend the limitation of the conventional resonance method in which the piezoelectric stack under measurement must be free to vibrate. An experimental setup has been designed and built according to the theoretical model, and the properties of a piezoelectric stack are characterized for a wide range of prestress to demonstrate the validity of this method. The experimental results show that properties including relative dielectric constant, piezoelectric constant, electromechanical coupling coefficient and elastic compliance exhibit strong pressure dependence. Among them, the piezoelectric constant measured by this method is compared with measurement by traditional static method, and the deviation between the refined and conventional method is less than 3.25% for a pressure range from 0 to 6 MPa, which indicates that the experimental results of the two test methods are consistent and the presented theoretical model for piezoelectric stack under preload manifests accuracy by means of the correctness and feasibility verification of the proposed method though cross validation and relevant discussions. Consequently, the refined resonance method could be extended to analyze the variation of piezoelectric stack properties that occurs under operational conditions with varied pressure.

show abstract

Section: Admittance Of the Piezoelectric Stack Under Preloadmentioning

confidence: 99%