Nonlinear capacitance dilatometry for investigating elastic and electromechanical properties of ferroelectrets
- Soft-Matter Physics, Johannes Kepler University, Altenberger Str. 69, A-4040 Linz (Austria)
Nonlinearities in ferroelectret polymer foam capacitors arise from voltage-dependent thickness changes. Such thickness changes are caused by the converse piezoelectric and electrostrictive effects in these soft materials. The authors show that the higher harmonics of the current response during application of a sinusoidal voltage to ferroelectret capacitors provide information on the elastic and electromechanical properties of the foam. The authors demonstrate the potential of this versatile measurement technique by investigating the temperature dependence of the piezoelectric response and by monitoring the changes in the elastic and electromechanical properties during inflation of cellular polypropylene.
- OSTI ID:
- 21013624
- Journal Information:
- Applied Physics Letters, Vol. 91, Issue 12; Other Information: DOI: 10.1063/1.2784960; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
- Country of Publication:
- United States
- Language:
- English
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