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2014 IEEE International Ultrasonics Symposium (IUS)
The 2014 IEEE IUS will bring together the ultrasonic communities from around the world to further the research and development of ultrasonic theories and applications. Papers are being solicited for this conference describing original work in the field of medical and industrial ultrasound.
2014 Joint IEEE International Symposium on the Applications of Ferroelectrics, International Workshop on Acoustic Transduction Materials and Devices & Workshop on Piezoresponse Force Microscopy (ISAF/IWATMD/PFM)
This conference covers the development of ferroelectric materials for a wide range of applications, including piezoelectrics, dielectrics, electro-optics, pyroelectrics, flexoelectrics, energy harvesting, non-volatile memory, and logic elements.
Taghaddos, E.; Hejazi, M.; Safari, A. Applications of Ferroelectric and Workshop on the Piezoresponse Force Microscopy (ISAF/PFM), 2013 IEEE International Symposium on the, 2013
In this paper, the processing and electrocmechanical of Mn-doped BNT-based ceramics prepared by mixed oxide route have been studied. Different amounts of Mn (0.01, 0.014, 0.015, 0.016, 0.017, 0.02, and 0.022) were doped to the 0.88[Bi0.5Na0.5TiO3]-0.08[Bi0.5K0.5TiO3]-0.04[Bi0.5Li0.5TiO3] ceramics. Samples were sintered at different temperatures (1075-1150 °C) to achieve the highest density and mechanical quality factor. Mn-doping resulted in a considerable enhancement ...
Grinberg, I.; Rappe, A.M. Applied Physics Letters, 2004
Using density functional theory calculations, we investigate the feasibility of using silver on the perovskite A-site in high-performance lead-free piezoelectrics. The calculations show that silver atoms are ferroelectrically active and can off-center by 0.5 _place_holder;Å. To induce Ag ferroelctric behavior absent in pure AgNbO3 we explore solid solutions of AgNbO3 with well-known simple perovskites PbTiO3, BaZrO3, and BaTiO3. For the AgNbO3-PbTiO3 ...
Modified <equation>(<font face='verdana'>K</font><sub>0.5</sub><font face='verdana'>Na</font><sub>0.5</sub>)<font face='verdana'>Nb</font><font face='verdana'>O</font><sub>3</sub></equation> based lead-free piezoelectrics with broad temperature usage range
Zhang, Shujun; Xia, Ru; Shrout, Thomas R. Applied Physics Letters, 2007
(K0.5Na0.5)NbO3 (KNN) based lead-free materials exhibit arguably, comparable piezoelectric properties to conventional Pb(Zr,Ti)O3 ceramics owing to an orthorhombic to tetragonal polymorphic phase transition (TO-T) occurring near room temperature. However, this transition correspondingly results in a strong temperature dependence of the dielectric and piezoelectric properties, being limited further by domain instability, during thermal cycling between the two ferroelectric phases. Analogous to ...
Domain wall motion and electromechanical strain in lead-free piezoelectrics: Insight from the model system (1 − x)Ba(Zr<inf>0.2</inf>Ti<inf>0.8</inf>)O<inf>3</inf>–x(Ba<inf>0.7</inf>Ca<inf>0.3</inf>)TiO<inf>3</inf> using in situ high-energy X-ray diffraction during application of electric fields
Tutuncu, Goknur; Li, Binzhi; Bowman, Keith; Jones, Jacob L. Journal of Applied Physics, 2014
The piezoelectric compositions (1 − x)Ba(Zr0.2Ti0.8)O3-x(Ba0.7Ca0.3)TiO3 (BZT- xBCT) span a model lead-free morphotropic phase boundary (MPB) between room temperature rhombohedral and tetragonal phases at approximately x = 0.5. In the present work, in situ X-ray diffraction measurements during electric field application are used to elucidate the origin of electromechanical strain in several compositions spanning the tetragonal compositional range 0.6 ≤ ...
Direct evidence of correlations between relaxor behavior and polar nano-regions in relaxor ferroelectrics: A case study of lead-free piezoelectrics Na<inf>0.5</inf>Bi<inf>0.5</inf>TiO<inf>3</inf>-x%BaTiO<inf>3</inf>
Ge, Wenwei; Luo, Chengtao; Devreugd, Christopher P.; Zhang, Qinhui; Ren, Yang; Li, Jiefang; Luo, Haosu; Viehland, D. Applied Physics Letters, 2013
Diffuse scattering and relaxor behavior in Na0.5Bi0.5TiO3 (NBT) and NBT-5.6 at. %BaTiO3 (NBT-5.6%BT) were investigated. X-ray diffraction revealed two types of diffuse scattering in NBT: (i) broad and (ii) asymmetric L-shaped. After modification with 5.6%BT, the broad diffuse scattering patterns became narrow, and the asymmetric L-shaped ones were replaced by symmetric ones. The symmetric diffuse scattering in NBT-5.6%BT disappeared with ...
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IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control was the number-three journal in acoustics in 2002, according to the annual Journal Citation Report (2002 edition) published by the Institute for Scientific Information. This publication focuses on the theory, design, and application on generation, transmission, and detection of bulk and surface mechanical waves; fundamental studies in physical acoustics; design of sonic ...