TY - JOUR
T1 - Fabrication and properties of radially 001C textured PMN-PT cylinders for transducer applications
AU - Poterala, Stephen F.
AU - Meyer, Richard J.
AU - Messing, Gary L.
N1 - Funding Information:
The authors would like to acknowledge support for this work provided by Raytheon Integrated Defense Systems.
PY - 2012/7/1
Y1 - 2012/7/1
N2 - 001C Textured PMN-PT ceramics have electromechanical properties (d33 850-1050 pm/V, k33 0.79-0.83) between those of conventional PZT ceramics and relaxor PMN-PT crystals. In this work, we tailor crystallographic orientation in textured PMN-PT ceramics for transducer designs with non-planar poling surfaces. Specifically, omni-directional cylindrical transducer elements were fabricated using monolithic, radially 001C textured and poled PMN-PT ceramic. Texture was produced by templated grain growth using NBT-PT templates, which were oriented radially by wrapping green ceramic tapes around a cylindrical mandrel. Finished transducer elements measure ∼5 cm in diameter by ∼2.5 cm in height and demonstrate scalability of textured ceramic fabrication techniques. The fabricated cylinders are ∼50 vol. textured and show high 31-mode electromechanical properties compared to PZT ceramics (d31 -259 pm/V, k31 0.43, T 33 3000, and Qm 350). Frequency bandwidth is related to the square of the hoop mode coupling coefficient kh2, which is ∼60 higher in textured PMN-PT cylinders compared to PZT 5H. Finite element simulations show that this parameter may be further increased by improving texture quality to 90 vol. . Radially textured PMN-PT may thus improve performance in omni-directional cylindrical transducers while avoiding the need for segmented single crystal designs.
AB - 001C Textured PMN-PT ceramics have electromechanical properties (d33 850-1050 pm/V, k33 0.79-0.83) between those of conventional PZT ceramics and relaxor PMN-PT crystals. In this work, we tailor crystallographic orientation in textured PMN-PT ceramics for transducer designs with non-planar poling surfaces. Specifically, omni-directional cylindrical transducer elements were fabricated using monolithic, radially 001C textured and poled PMN-PT ceramic. Texture was produced by templated grain growth using NBT-PT templates, which were oriented radially by wrapping green ceramic tapes around a cylindrical mandrel. Finished transducer elements measure ∼5 cm in diameter by ∼2.5 cm in height and demonstrate scalability of textured ceramic fabrication techniques. The fabricated cylinders are ∼50 vol. textured and show high 31-mode electromechanical properties compared to PZT ceramics (d31 -259 pm/V, k31 0.43, T 33 3000, and Qm 350). Frequency bandwidth is related to the square of the hoop mode coupling coefficient kh2, which is ∼60 higher in textured PMN-PT cylinders compared to PZT 5H. Finite element simulations show that this parameter may be further increased by improving texture quality to 90 vol. . Radially textured PMN-PT may thus improve performance in omni-directional cylindrical transducers while avoiding the need for segmented single crystal designs.
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U2 - 10.1063/1.4730938
DO - 10.1063/1.4730938
M3 - Article
AN - SCOPUS:84864134286
SN - 0021-8979
VL - 112
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 1
M1 - 014105
ER -