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Thin Film Composite Silicon Elastomers for Cell Culture and Skin Applications: Manufacturing and Characterization
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High-performance PMN-PT thick films.

Marija Kosec1, Hana Ursic, Janez Holc

  • 1Jožef Stefan Institute, Ljubljana, Slovenia.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|October 5, 2010
PubMed
Summary
This summary is machine-generated.

Thick films of lead magnesium niobate-lead titanate (0.65PMN-0.35PT) were fabricated on alumina substrates using screen-printing. Optimized sintering yielded dense films with significant normalized displacement for actuator applications.

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Area of Science:

  • Materials Science
  • Ceramic Engineering
  • Solid State Physics

Background:

  • Lead magnesium niobate-lead titanate (PMN-PT) is a relaxor ferroelectric material with potential applications in actuators.
  • Thick films offer advantages for device fabrication, but achieving dense and high-performance films on substrates can be challenging.

Purpose of the Study:

  • To develop and characterize screen-printed 0.65PMN-0.35PT thick films on alumina substrates.
  • To optimize the sintering process for dense film microstructure.
  • To evaluate the dielectric, piezoelectric, and electrostrictive properties for actuator applications.

Main Methods:

  • Screen-printing of a PMN-PT paste onto platinized alumina substrates with an adhesion layer.
  • Optimized sintering at 950 °C for 2 h using packing powder.
  • Characterization using scanning electron microscopy (SEM), dielectric and piezoelectric measurements, and atomic force microscopy (AFM).

Main Results:

  • Dense 0.65PMN-0.35PT thick films were successfully fabricated.
  • Dielectric, piezoelectric, and electrostrictive properties were measured.
  • Substrate-free bending actuators demonstrated a normalized displacement of 55 μm/cm at 3.6 kV/cm.

Conclusions:

  • Screen-printing is a viable method for producing high-performance PMN-PT thick films.
  • Optimized processing leads to dense microstructures suitable for actuator applications.
  • The developed thick films show promise for large-displacement actuator devices.