Fiches de cours 2017-2018

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Piezoelectric materials, properties and devices

MSE-611

Lecturer(s) :

Damjanovic Dragan

Language:

English

Frequency

Every 2 years

Remarque

Next time Fall 2017

Summary

The students acquire knowledge on structure-property relations of piezoelectric and related materials (ferroelectrics, relaxors). Different material classes (ceramics, crystals, composites, polymers) are discussed in view of applications in sensors, actuators, high frequency transducers and others.

Content

Since the backround and interest of the attendeeds varies from year to year, the lectures' content is adapted each time to the partcipants as much as this is possible. The discussed topics may include but are not limited to:
1. Piezoelectric effect. Thermodynamic relations. Electromechanical coupling coefficients. Constitutive equations.
Boundary conditions.
2. Piezoelectric materials: single crystals, ceramics, polymers and composites. New piezoelectric materials.
3. Piezoelectric anisotropy. Symmetry and piezoelectricity.
4. Concept of morphotropic phase boundary. Soft and hard piezoelectrics.
5. Piezoelectric resonance.
6. Equivalent circuits.
7. Physical phenomena that can contribute to the piezoelectric effect. Piezoelectric hysteresis, nonlinearity, creep
and relaxation.
8. Piezoelectric actuators and motors.
9. Piezoelectric sensors. Quasistatic and resonance mode of operation.
10. High frequency piezoelectric transducers for medical imaging. Concept of matching layers. Ultrasonic arrays.
Doppler probes.
11. Surface acoustic wave effect and devices.
12. Other types of electro-mechanical and magneto-electro-mechanical coupling (electrostriction, flexoelectricity, strain mediated magneto-electric effect)

Note

Maximum number of participants: 30

Keywords

Piezoelectric effect, piezoelectric materials, actuators, sensors, crystals, ceramics, transducers power transducers, surface acoustic wave effect

Learning Prerequisites

Recommended courses

physics and mathematics on the bachelor level of EPFL, basic materials science

Resources

Websites

In the programs

Reference week

 
      Lecture
      Exercise, TP
      Project, other

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  • Autumn semester
  • Winter sessions
  • Spring semester
  • Summer sessions
  • Lecture in French
  • Lecture in English
  • Lecture in German