Application Cases

Experiment Title: Electrode Preparation and Polarization Study of Interdigital Electrode Tubular Piezoelectric Components

Testing Purpose:Currently, scholars have conducted a series of studies on tubular piezoelectric components with interdigital electrodes. Through the statics equations, theoretical derivations have been completed, and finite element analysis models have been established to simulate and analyze the static driving performance of these piezoelectric components. The results indicate that the axial free strain of these piezoelectric components can reach 1.55 times that of ordinary models, enabling large displacement output. Based on the existing research, this paper will conduct experimental studies on the electrode preparation and polarization process of these piezoelectric components to verify the rationality and advancement of their structure.

Testing Equipment:ATA-2041 High Voltage Amplifier, Function Generator, Oscilloscope, Switch, Computer, etc.

Figure 1: Displacement Detection Platform

Experiment Process:

A displacement detection platform was built. The signal excitation source used an arbitrary function generator. After being amplified by the ATA-2041 high voltage amplifier from Aigtek Antai, one end was electrically connected to the positive and negative electrodes of the sample for excitation voltage input, while the other end was connected to the oscilloscope to observe the waveform curve and parameter changes of the excitation signal. The data acquisition end was connected to the computer and the spectrally confocal controller through a switch. A displacement sensor with an adjustable tightening bolt was fixed on the support frame, with the light source aimed at the sample. The displacement changes were monitored in real-time through software, and the results were extracted.

Experimental Results:

Figure 2: Axial Displacement Response Chart

When the excitation voltage reached 200V, the curves basically reached the peak displacement. The peak displacement was more evident when the polarization time was 40min and 60min. As shown in Figure 2, when the polarization time was 20min, 30min, and 50min, the displacement results did not reach the peak at 200V but reached the peak at a point near 200V. This was due to the interference of poor signals, possibly caused by the collapse phenomenon during the electrode sintering process.

The displacement detection platform was built to analyze the influence of polarization time on the displacement of the components. The results showed that as the polarization time increased, the peak displacement continued to grow. With the polarization voltage set at 500V and the polarization temperature at 110℃, the peak displacement was 0.3μm when the polarization time was 60min. This research result provides a reference for further exploration of interdigital electrode tubular piezoelectric components.

High Voltage Amplifier Recommendation: ATA-2041

Figure: Specifications of the ATA-2041 High Voltage Amplifier

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