Experimental Arrangement for Measuring the Resonance Curves of Radial Mode at High Temperatures
The characterization of piezoelectric materials with the temperature is of great importance since it allows adjusting the technological parameters to obtain high quality ceramic. The electromechanical constants of piezoelectric materials are determined by the measurement of the admittance or impedance of transducers starting from the curves of resonance. In this work an equipment is presented that allows to measure in an automated way the resonance curves of piezoelectric ceramic in the range of 25 at 150oC and between 4Hz to 4 MHz. A new experimental work was included in the subject Experimental Methods of the Physics that the students of the career of Physics study in the fifth year. This practice allows the students to familiarize with a modern technique as well as to know the foundations of the piezoelectricity and its applications. The electromechanical parameters are calculated from the measured curves, from 25-150o C with step of 5o C from the resonant frequencies in Z vs Frec curves corresponding to the radial mode in PZT 53/47: Gd ceramic
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