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Enhanced Properties of 3-MHz Sliver-Mode Vibrators for Cardiac Probes With Alternating Current Poling for Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 Single Crystals.
- Source :
-
IEEE transactions on ultrasonics, ferroelectrics, and frequency control [IEEE Trans Ultrason Ferroelectr Freq Control] 2022 Nov; Vol. 69 (11), pp. 3087-3094. Date of Electronic Publication: 2022 Nov 03. - Publication Year :
- 2022
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Abstract
- We investigated the effects of alternating current poling (ACP) on the piezoelectric and dielectric properties of 3-MHz sliver mode (L13 mm × W0.10-0.25 mm × T0.48 mm) vibrators fashioned from Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 (PMN-0.30PT) single crystal (SC) plate manufactured using the continuous-feeding Bridgman (CF-BM) method for cardiac probes. The ACP SC plate (L13 mm × W24 mm × T0.48 mm) exhibited ultrahigh dielectric permittivity ( ε <superscript>T</superscript> <subscript>33</subscript> /ε <subscript>0</subscript> ) and piezoelectric coefficient ( d <subscript>33</subscript> ) of 9690 and 2920 pC/N, respectively. After array dicing, the SC slivers with widths of 0.10, 0.15, 0.20, and 0.25 mm were obtained, and their average ε <superscript>T</superscript> <subscript>33</subscript> /ε <subscript>0</subscript> values decreased from the SC plate ε <superscript>T</superscript> <subscript>33</subscript> /ε <subscript>0</subscript> by 45% (5330), 29% (6880), 19% (7840), and 15% (8240), respectively, possibly because of heat and mechanical damage during the dicing. A combination of the ACP and a postdicing direct current poling (ACP-DCP) recovered their ε <superscript>T</superscript> <subscript>33</subscript> /ε <subscript>0</subscript> values to 6050, 7080, 8140, and 8540, respectively. The sliver mode electromechanical coupling factors ( k' <subscript>33</subscript> ) were confirmed to exceed 93% after the ACP-DCP process, which were more than 4% higher than those of DCP-DCP SC slivers. The measured impedance spectra indicated that the SC slivers with 0.10-0.20 mm in width showed no spurious mode vibration near the fundamental k' <subscript>33</subscript> mode. We conclude that the ACP-DCP SC slivers maintained more enhanced piezoelectric and dielectric properties than the DCP-DCP samples. These results will have important implications for the commercial application of ACP technology to medical imaging ultrasound probes.
- Subjects :
- Electricity
Electric Impedance
Vibration
Niobium chemistry
Lead
Subjects
Details
- Language :
- English
- ISSN :
- 1525-8955
- Volume :
- 69
- Issue :
- 11
- Database :
- MEDLINE
- Journal :
- IEEE transactions on ultrasonics, ferroelectrics, and frequency control
- Publication Type :
- Academic Journal
- Accession number :
- 35981066
- Full Text :
- https://doi.org/10.1109/TUFFC.2022.3199741