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X7R dielectric multilayer ceramic capacitors show good micro-actuating properties with little hysteresis

X7R dielectric multilayer ceramic capacitors show good micro-actuating properties with little hysteresis

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The possibility of a kind of industrial-grade X7R type multilayer ceramic capacitor used as an actuator is studied. By applying a DC bias voltage, the ceramic capacitors exhibit a large converse piezoelectric effect which can be used for actuating applications. The experiments show that the capacitor's thickness changes rather linearly with a voltage applied on it. Three multilayer ceramic capacitors were selected to be studied. A hysteresis <1.8% and a nonlinearity <2.0% between the displacement and the driving voltage were observed for a 10 μF capacitor over a frequency range of 0.1–20 Hz and a temperature range of 15–35°C.

References

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      • 2. Fripp, M.L., Hagood, N.W.: ‘Comparison of electrostrictive and piezoceramic actuation for vibration suppression’. Proc. SPIE 2443, San Diego, USA, May 1995, pp. 334348, doi: 10.1117/12.208272.
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      • 3. Sherrit, S., Mukherjee, B.K.: ‘Electrostrictive materials: characterization and applications for ultrasound’. Proc. SPIE 3341, San Diego, USA, May 1998, pp. 196207, doi: 10.1117/12.308000.
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