Improvement of the Standard Characterization Method on k33 Mode Piezoelectric Specimens

TL;DR

This paper identifies limitations in the IEEE standard k33 mode measurement method for piezoelectric specimens and introduces a partial electrode technique with curve fitting to improve accuracy and parameter determination.

Contribution

It proposes a novel partial electrode method and curve fitting approach to address deficits in the standard k33 measurement technique for piezoelectric materials.

Findings

Reduced experimental error in capacitance measurement

Improved accuracy in loss determination

Enhanced ability to directly measure elastic properties

Abstract

Even though standard method to determine physical parameters of piezoelectric materials has been set up for several decades, bare attention has been made on loss determination method. Furthermore, several deficits have been recognized in the standard method for k33 mode. In this study, detailed discussion on deficits of IEEE Standard k33 is investigated and the method to resolve such deficits will be introduced. The standard k33 specimen suffers from small capacitance, which causes huge experimental error, intrinsic electrical energy leakage, specimen setup issue and inability to directly determine intensive elastic properties. In order to resolve these issues, partial electrode method was introduced, and curve fitting was demonstrated to determine physical parameters and losses.