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Meet us at Eurosensors 2010 in Linz

InSensor will present new results on high performance piezoelectric thick films at the Eurosensors XXIV in Linz, Austria

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Meet us at Electroceramics XII in Trondheim

The presentation will be given by Karsten Hansen on June 15 in session Piezoelectric materials III and the title is, Focused high frequency lead-free transducers based on piezoelectric thick films

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Meet us at IDTechEx Energy Harvesting & Storage Europe in Munich

The presentation will be given by Dr. Tomasz Zawada on May 27 and the title is, High Coupling Piezoelectric Thick Film Materials

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Energy harvesting - basics

Energy harvesting, also known as energy scavenging, covers a great body of technologies and devices that transform low grade energy sources such as solar energy, ambient vibrations, thermal energy, human motion into usable electrical energy. Due to the rapid development of ultra low power electronic devices, the energy harvesting technology has become a very attractive solution for a wide variety of applications such as consumer electronics, outpatient medical electronics (hearing aids, pacemakers, smart implants) or imaging (camera inside the human body). A wireless and battery less network of remote sensors located in places where human intervention for replacement of batteries is difficult will be another very attractive application area.

PZT thick film based energy harvesting devices

Due to its outstanding properties and compatibility with MEMS technology, PZT thick film technology offers attractive solutions for energy harvesting devices.

One of the solutions for energy harvesting is based on the MEMS cantilever with integrated PZT thick film. The basic properties are as follows:

  • Dimensions: 25.0 x 3.0 x 0.3 mm3
  • Output impedance: 38 kOhm
  • Resonance frequency 610 Hz
  • Quality factor: 65

The chart shown below presents a typical performance of the PZT thick film energy harvesting device @ 5 g accleration, and frequency range 590 to 650 Hz (in cooperation with LUSSI, University of Tours, France).

Performane

The maximal power output occurs at the resonance frequency (620 Hz) and is equal to 18 uW, giving the maximal power density 6 mW/mm3.