EXPERIMENTAL PROCEDURE OF FREQUENCY DETERMINATION IN PIEZOELECTRIC CERAMICS MATERIALS

للكاتبين :

Riffat Asim Pasha, M. Zubair Khan and A.M Hashmi

Mechanical Engineering Department

University of Engineering & Technology Taxila

ABSTRACT

In the past two decades many theoretical studies, numerical finite element analyses and modeling

conducted the fracture and damage of piezoelectric ceramics under electrical, mechanical,

thermal and combined electromechanical loading modes. The properties of these materials

degrade due to any one of those loading condition. One of the methods to calculate the various

properties relating piezoelectric properties is the determination of frequencies of minimum and

maximum impedance. This research paper describes the design and fabrication of frequencies

determination circuit and methodology to measure it. Designed parameters include the switch box

circuit, oscillator circuit, frequency counter and decade resistor circuit. Voltmeter and waveform

generator are the required accessories for generation and measurement. The frequencies of

minimum and maximum impedance are further used for the determination of coupling, elastic

constants, piezoelectric constants and mechanical Q factor.

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