Abstract
Lead-free, (BiNa 0.88 K 0.08 Li 0.04 ) 0.5 Ti 0.995 Mn 0.015 O 3 piezoceramic has been successfully densified by a novel electrical current applied technique known as flash sintering (FS) at 880 °C. The effect of alternating and direct current, current density limit and holding time on the densification, crystal structure, electromechanical and electrical properties have been investigated. The optimum flash condition was obtained with a 1 KHz alternating current, 100 V·cm −1 initial electric field and preset maximum current limit of 1.5 A·cm -2 . The flash sintered specimen is characterized with finer grain size (10–15 μm), slightly higher electromechanical properties and higher symmetry butterfly shape strain hysteresis loop compared to conventional sintering. Under both sintering conditions uniform distribution of elements and pure rhombohedral structure were observed. Flash sintering also results in lower resistivity and more significant grain boundaries contributions in the conduction mechanism.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 2882-2888 |
| Number of pages | 7 |
| Journal | Journal of the European Ceramic Society |
| Volume | 39 |
| Issue number | 9 |
| DOIs | |
| State | Published - Aug 1 2019 |
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All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry
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Electromechanical properties of flash sintered BNT-based piezoelectric ceramic. / Taghaddos, Elaheh; Charalambous, Harry; Tsakalakos, Thomas; Safari, Ahmed.
In: Journal of the European Ceramic Society, Vol. 39, No. 9, 01.08.2019, p. 2882-2888.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electromechanical properties of flash sintered BNT-based piezoelectric ceramic
AU - Taghaddos, Elaheh
AU - Charalambous, Harry
AU - Tsakalakos, Thomas
AU - Safari, Ahmed
PY - 2019/8/1
Y1 - 2019/8/1
N2 - Lead-free, (BiNa 0.88 K 0.08 Li 0.04 ) 0.5 Ti 0.995 Mn 0.015 O 3 piezoceramic has been successfully densified by a novel electrical current applied technique known as flash sintering (FS) at 880 °C. The effect of alternating and direct current, current density limit and holding time on the densification, crystal structure, electromechanical and electrical properties have been investigated. The optimum flash condition was obtained with a 1 KHz alternating current, 100 V·cm −1 initial electric field and preset maximum current limit of 1.5 A·cm -2 . The flash sintered specimen is characterized with finer grain size (10–15 μm), slightly higher electromechanical properties and higher symmetry butterfly shape strain hysteresis loop compared to conventional sintering. Under both sintering conditions uniform distribution of elements and pure rhombohedral structure were observed. Flash sintering also results in lower resistivity and more significant grain boundaries contributions in the conduction mechanism.
AB - Lead-free, (BiNa 0.88 K 0.08 Li 0.04 ) 0.5 Ti 0.995 Mn 0.015 O 3 piezoceramic has been successfully densified by a novel electrical current applied technique known as flash sintering (FS) at 880 °C. The effect of alternating and direct current, current density limit and holding time on the densification, crystal structure, electromechanical and electrical properties have been investigated. The optimum flash condition was obtained with a 1 KHz alternating current, 100 V·cm −1 initial electric field and preset maximum current limit of 1.5 A·cm -2 . The flash sintered specimen is characterized with finer grain size (10–15 μm), slightly higher electromechanical properties and higher symmetry butterfly shape strain hysteresis loop compared to conventional sintering. Under both sintering conditions uniform distribution of elements and pure rhombohedral structure were observed. Flash sintering also results in lower resistivity and more significant grain boundaries contributions in the conduction mechanism.
UR - http://www.scopus.com/inward/record.url?scp=85063391983&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85063391983&partnerID=8YFLogxK
U2 - 10.1016/j.jeurceramsoc.2019.03.050
DO - 10.1016/j.jeurceramsoc.2019.03.050
M3 - Article
AN - SCOPUS:85063391983
VL - 39
SP - 2882
EP - 2888
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
SN - 0955-2219
IS - 9
ER -