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2013 IEEE-UFFC Joint Symposia (IUS/ISAF/IFC/EFTF)Visit website
the joint IUS\, ISAF\, IFC\, and EFTF conference is aimed at bringing the ultrasonics\, ferroelectrics\, Frequency Control and Time Forum communities around the world together more closely and through discussions on recent research and development of fundamentals\, materials\, devices\, and applications .
2012 Joint 21st IEEE ISAF / 11th IEEE ECAPD / IEEE PFM (ISAF/ECAPD/PFM)Visit website
ISAF-ECAPD-PFM aims to provide a forum to present and discuss the state-of-the-art developments in the field of ferroelectrics and related materials and their applications\, including novel nanoscale methods of their investigation.
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 <equation>0.5<span style="font-size: .5em;"> </span><font face='roman'>Å</font></equation>. To induce <equation><font face='roman'>Ag</font></equation> ferroelctric behavior absent in pure <equation><font face='roman'>AgNbO</font><sub>3</sub></equation> we explore solid solutions of <equation><font face='roman'>AgNbO</font><sub>3</sub></equation> with well-known simple perovskites <equation><font ...
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
<equation>(<font face='roman'>K</font><sub>0.5</sub><font face='roman'>Na</font><sub>0.5</sub>)<font face='roman'>Nb</font><font face='roman'>O</font><sub>3</sub></equation> (KNN) based lead-free materials exhibit arguably, comparable piezoelectric properties to conventional <equation><font face='roman'>Pb</font>(<font face='roman'>Zr</font>,<font face='roman'>Ti</font>)<font face='roman'>O</font><sub>3</sub></equation> ceramics owing to an orthorhombic to tetragonal polymorphic phase transition <equation>(T<sub>O-T</sub>)</equation> 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 ...
Pardo, L.; Garcia, A.; Brebol, K.; Mercadelli, E.; Galassi, C. Applications of Ferroelectrics held jointly with 2012 European Conference on the Applications of Polar Dielectrics and 2012 International Symp Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials (ISAF/ECAPD/PFM), 2012 Intl Symp, 2012
Undoped (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.96</sub>Ba<sub>0.04</sub>TiO<sub>3</sub> ceramics were prepared from mixed oxides and sol-gel autocombustion powder. Similar dielectric and electromechanical properties were found for both but sol-gel derived ceramics can be obtained with a lower thermal budget, which prevent losses of volatiles. Dielectric anisotropy is observed. All the features of the thermal evolution curves of ε<sup>T</sup><sub>11</sub> are observed at temperatures clearly displaced towards higher ...
Zhang, Shujun; Jong Bong Lim,; Hyeong Jae Lee,; Xia, Ru; Shrout, Thomas R. Applications of Ferroelectrics, 2008. ISAF 2008. 17th IEEE International Symposium on the, 2008
Lead free materials 0.95(K0.5Na0.5)NbO3-0.05LiSbO3 modified by CaTiO3 (CT) (1??3wt%) have been synthesized by conventional sintering. All samples exhibited pure perovskite phase with a tetragonal structure at room temperature. The Curie temperature was found to decrease with increasing CT addition in KNN-LS ceramics, while the orthorhombic to tetragaonl polymorphic phase transition was found to shift further downward from room temperature to ...
Hansen, K.; Astafiev, Konstantin; Zawada, T. Ultrasonics Symposium (IUS), 2009 IEEE International, 2009
Lead-based piezoelectric materials such as lead zirconate titanate (Pb(Zr<sub>x</sub>,Ti<sub>1-x</sub>)O<sub>3</sub> or PZT) and lead meta-niobate (PbNb<sub>2</sub>O<sub>6</sub>) are the most widely used materials nowadays in the market for piezoelectric application, including recently developed thick films based devices, because of their excellent piezoelectric properties, good reproducibility, and low production cost. At the same time, the high lead toxicity, problems with the recycling and ...
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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 ...