Abstrucr-A method is described by which the real and imaginary parts of the materials coefficients governing the behavior of a resonator may be found from only three measurements of the immitance. An initial guess of the elastic constant provides a means for the reduction of the immittance formula to an equation, linear in the dielectric and the square. of the piezoelectric constant. Measurement of immittance at two frequencies generates a solvable system of equations. When the dielectric and piezoelectric constants have been found, they can be used for a more accurate determination of the elastic constant, which may replace the initial guess in an iteration procedure. For a complete determination of all materials coefficients, the number of required resonator geometries is shown to be four.
Iterative Method for Accurate Determination of the Real and Imaginary Parts of the Materials Coefficients of Piezoelectric Ceramics
- Jul 16, 2018 -