Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 5283-5287 |
| Journal | Journal of Applied Physics |
| Volume | 91 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2002 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- piezoelectric materials
- polymers
- foams
- discharges (electric)
- electric breakdown
- hysteresis
- porous materials
- dielectric polarisation
Cite this
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Dielectric barrier microdischarges. Mechanism for the charging of cellular piezoelectric polymers. / Lindner, Michael; Bauer-Gogonea, Simona; Bauer, Siegfried; Paajanen, Mika; Raukola, Jaakko.
In: Journal of Applied Physics, Vol. 91, No. 8, 2002, p. 5283-5287.Research output: Contribution to journal › Article › Scientific › peer-review
TY - JOUR
T1 - Dielectric barrier microdischarges. Mechanism for the charging of cellular piezoelectric polymers
AU - Lindner, Michael
AU - Bauer-Gogonea, Simona
AU - Bauer, Siegfried
AU - Paajanen, Mika
AU - Raukola, Jaakko
PY - 2002
Y1 - 2002
N2 - Charged closed-cell polymer foams have been found to be highly sensitive piezoelectric materials. Charging is shown to arise from dielectric barrier microdischarges within the voids of the cellular polymer. Above the threshold voltage for breakdown in the voids, the microdischarges are evidenced by light emission from the polymer, as well as by displacement-voltage hysteresis loops. Monitoring light emission during breakdown is shown to provide a quick check for the suitability of foams for piezoelectric applications. Additionally it allows for the visualization of micropores in foams in a nondestructive way. The piezoelectric response of the foam can be switched by applying dc-voltage pulses of alternating polarity above the breakdown threshold, thereby showing the feasibility of patterning the piezoelectric properties within the film plane. Although piezoelectric foams are nonferroelectric, the experiments prove similarities to ferroelectric materials with respect to hysteresis behavior, as well as a threshold (coercive) field for switching of the polarization and piezoelectricity.
AB - Charged closed-cell polymer foams have been found to be highly sensitive piezoelectric materials. Charging is shown to arise from dielectric barrier microdischarges within the voids of the cellular polymer. Above the threshold voltage for breakdown in the voids, the microdischarges are evidenced by light emission from the polymer, as well as by displacement-voltage hysteresis loops. Monitoring light emission during breakdown is shown to provide a quick check for the suitability of foams for piezoelectric applications. Additionally it allows for the visualization of micropores in foams in a nondestructive way. The piezoelectric response of the foam can be switched by applying dc-voltage pulses of alternating polarity above the breakdown threshold, thereby showing the feasibility of patterning the piezoelectric properties within the film plane. Although piezoelectric foams are nonferroelectric, the experiments prove similarities to ferroelectric materials with respect to hysteresis behavior, as well as a threshold (coercive) field for switching of the polarization and piezoelectricity.
KW - piezoelectric materials
KW - polymers
KW - foams
KW - discharges (electric)
KW - electric breakdown
KW - hysteresis
KW - porous materials
KW - dielectric polarisation
U2 - 10.1063/1.1459751
DO - 10.1063/1.1459751
M3 - Article
VL - 91
SP - 5283
EP - 5287
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 8
ER -