Technique of Determination of the Piezoelectric Modulus d 33 and Investigation of the Limits of its Use
Source abstract
Abstract
The classification of the piezoelectric modulus measurement methods for different loading regimes is investigated. It is established that the quasi-static methods make it possible to determine the static piezoelectric constants with the minimum errors. An improved method of measuring the piezoelectric modulus d33 in the quasi-static regime is developed. The method ensures the minimum effect of changes in the domain orientation and transition processes. Dependences of d33 on the level of mechanical stresses σn are obtained for TsTS-19, TsTS-23, and TsTBS-3 piezoceramics and it is shown that their nature depends of the “ferro-rigidity” of the piezoceramics composition. Features of the dependences d33(σn) associated with the variation of the contact area of piezoelectric elements in the process of measurements and the effect of changes in the domain orientation are revealed. It is shown that the lower boundary of the compression force amounts to 2 MPa for TsTS-19. It is also established that the optimum dimension of the piezoelectric elements in determining d33 must satisfy the condition 0:45 < ℏ < 1:75. It is calculated that the error in measurements of d33 in accordance with the method proposed is 4.5% with the confidence probability of 95%.
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OpenAlex topics: Sensor Technology and Measurement Systems · Advancements in Materials Engineering · Mechanical and Thermal Properties Analysis
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References (17)
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