Ultrasonic transducer based on highly textured PMN-PT piezoelectric ceramic
Tóm tắt
A successful fabrication process of textured ceramics by homo-template grain growth (HTGG) is described. Two samples fabricated with this technique were characterised. Functional properties obtained are competitive with for example a thickness coupling factor over 50%. Different characteristics were compared with those obtained by a unit cell model previously developed for piezocomposites and extended to the case of two piezoelectric phases. Behaviours of several connectivities (0–3, 3–0 and 3–3) are calculated and results show that the spatial arrangement does not have a great influence on effective parameters. A transducer based on a textured ceramic sample has been fabricated and characterised. The measured performance shows the efficiency of these new piezoelectric materials. Finally, electroacoustic responses of identical single element transducer configurations have been simulated. They show that a sensitivity increase of 3dB can be obtained at equivalent relative bandwidth of 40% with textured ceramic sample in comparison with PMN-PT ceramic used as a matrix in the textured ceramic.
Tài liệu tham khảo
R.E. Newnham, D.P. Skinner, L.E. Cross, Connectivity and piezoelectric-pyroelectric composites. Mater. Res. Bull. 13, 525–536 (1978)
R. Krimholtz, D.A. Leedom, G.L. Matthei, New equivalent circuit for elementary piezoelectric transducers. Electron. Lett. 38, 338–339 (1970)
M. Pham Thi, H. Hemery, Homoepitaxial Template Grain Growth of Textured PMN-PT ceramics. CIMTEC, 10th International Ceramics Congress, Part. 631 (2002)
H. Hemery, Céramiques orientées hautes performances: Pb(Mg1/3Ng2/3)03-PbTiO3 par croissance pseudo-morphose. INSA Lyon France, (2003) Ph.D Thesis (In French)
M. Pham Thi, H. Hemery, O. Durand, H. Dammak, Orientation distribution and fiber textured of highly oriented piezoceramics: (1-x)PbMg1/3Ng2/303 -xPbTiO3 system. J. J. Appl. Phys. 43(12), 8190 (2004)
M. Pham Thi, G. March, P. Colomban, Phase diagram and raman imaging of grain growth mechanism in highly textured Pb(Mg1/3Nb 1/3)O3-PbTiO3 piezoelectric ceramics. J. Eur. Ceram. Soc. 25(14), 3335 (2005)
D. Royer, E. Dieulesaint, Ondes elastiques dans les solides. Tome 1: Propagation libre et guidée. Masson Ed. (1996)
L.P. Tran-Huu-Hue, F. Levassort, N. Felix, D. Damjanovic, W. Wolny, M. Lethiecq, Comparison of several methods to characterize the high frequency behavior of piezoelectric ceramics for transducer applications. Ultrasonics 38(1), 219–223 (2000)
T. Delaunay, E. Le Clézio, H. Dammak, P. Gaucher, M. Pham Thi, M. Lethiecq, G. Feuillard, Frequency dependence of electromechanical properties of PZN-xPT single crystals. J. Phys. IV. 128, 161–167 (2005)
F. Levassort, M. Lethiecq, D. Certon, F. Patat, A matrix method for modeling electroelastic moduli of 0–3 piezo-composites. IEEE Trans. Ultrason. Ferroelect. Freq. Control. 44(2) 445–452 (1997)
F. Levassort, M. Lethiecq, R. Desmare, L.P. Tran-Huu-Hue, Effective electroelastic moduli of 3–3(0–3) piezocomposites. IEEE Trans. Ultrason. Ferroelect. Freq. Control. 46(4), 1028–1034 (1999)
M. Pham Thi, H. Hemery, H. Dammak, X ray investigation of high oriented (1-x)PbMg1/3Ng2/303-(x)PbTiO3 ceramics. J. Eur. Ceram. Soc. 25, 2433–2435 (2005)
J.Y. Li, The effective electroelastic moduli of textured piezoelectric polycristalline aggregates. J. Mech. Phys. Solids. 48, 529–552 (2000)
W. Jiang, Z. Zhang, B. Jiang, W. Cao, Characterisation of piezoelectric materials with large piezoelectric and electromechanical coupling coefficients. Ultrasonics. 41, 55–63 (2003)
R. Zhang, B. Jiang, W. Cao, Elastic, piezoelectric and dielectric properties of multidomain 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 single crystals. J. Appl. Phys. 90(7), 3471–3475 (2001)
R. Zhang, B. Jiang, W. Cao, Orientation dependence of piezoelectric properties of single domain 0.67Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 crystals. Appl. Phys. Lett. 82(21), 3737–3739 (2003)
IEEE Std., Standard on Piezoelectricity ANSI/IEEE Std. 176-1987. IEEE Trans. Ultrason. Ferroelect. Freq. Control 43(5), 719–772 (1996)
S.J.H. Van Kervel, J.M. Thijssen, A calculation scheme for the optimum design of ultrasonic transducers. Ultrasonics 21, 134–140 (1983)
R. Desmare, L.P. Tran-Huu-Hue, F. Levassort, M. Lethiecq, Optimisation method for ultrasonic transducers used in medical imaging. Journal Revista de Acustica. 33, (2003)
J.M. Thijssen, W.A. Verhoef, M.J. Cloostermans, Optimisation of ultrasonic transducers. Ultrasonics 41–46 (1985)