Piezo 2017

Cercedilla (Madrid) SPAIN          
February 19 to 22, 2017

ORGANIZATION

View the Organizing committee here.

Contact e-mail:

piezo2017@icmm.csic.es

Piezo Institute
ICMM CSIC
UPM de Madrid
Jecs Trust
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Program


  • Piezoelectrics, ferroelectrics, relaxors, tunable materials, etc.
  • New Processing Techniques: bulk, thick and thin films, LTCC, integration, lithography-free deposition methods, flexible substrates, etc.
  • Lead free ceramics and other sustainable materials
  • MEMS and sensors
  • Advanced structural, piezoelectric and mechanical characterization
  • Materials and devices for high frequency ultrasonic medical imaging and other biomedical applications
  • Other ultrasonic applications (NDE, underwater, ranging etc.)
  • Telecommunications / ICT
  • Concepts and materials for very high temperature applications
  • High power devices (medical therapy etc.)
  • Energy harvesting concepts and devices, energy storage using antiferroelectrics
  • Actuators (for ink jet printers, fuel injection etc.)
  • Modeling

Confirmed Invited Talks

Insight into Structure, Properties, and Mobility of Ferroelectric Domain Walls

Nava Setter
Ceramics Laboratory, Materials Department. EPFL Swiss Federal Institute of Technology 1015 Lausanne, Switzerland

As interfaces that can be displaced in-situ, ferroelectric domain walls are a source of continuous fascination. We have been studying during the past 5 years some of their properties and internal structure and learnt how to control domain wall patterns. Among the obtained results are dense patterns of arrays of domains and domain walls having < 10 nm width /periodicity, controlled displacement of domain walls, domain walls with metallic conductivity inside the insulating matrix and their controlled density and demonstrated reconfigurability. In addition we have evidenced ferroelectric boundaries in non-ferroelectric materials, evidenced polarization development across wide walls, demonstrated ferroelectric switch for propagation of ferromagnetic domain walls at room temperature, and showed the possibility of elastic interaction between non-ferroelastic domain walls, promising new possibilities for domain-wall control.

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Conductive charged domain walls, formed and reconfigured in BiFeO3 films (from A. Crassous et al. Nat. Nanotech. 2015)

Brief CV Prof. Nava Setter.

Completed MSc in Civil Engineering at the Technion – Israel Institute of Technology and PhD in Solid State Science in Penn. State University, USA. After post-doctoral work at the Universities of Oxford and Geneva, she joined an R&D institute in Haifa (Israel) where she became the head of the Electronic Ceramics Lab in 1988. Since 1989 she has been directing the Ceramics Laboratory of EPFL, the Swiss Federal Institute of Technology in Lausanne (Switzerland) where she is a professor of Materials Science and Engineering. Starting Autumn 2016, she is also affiliated with the University of Tel Aviv, Israel. Her research interests include ferroelectrics and piezoelectrics, in particular the effects of interfaces, finite-size, and domain-wall phenomena, structure-property relations and the pursuit of new applications.

Using phononic crystals to stop progressive waves in piezoceramic resonators

Francisco Montero de Espinosa
Instituto de Tecnologias Físicas y de la Información Leonardo Torres Quevedo (ITEFI) C/ Serrano, 144 28006-Madrid, Spain

APiezoceramic resonators vibrate with resonance modes where waves coming from the boundaries interact. To obtain “clean” resonance modes, care must be taken to avoid interferences from boundaries different to those associated to the desired mode. In applications where high Q resonators and ransducers are needed, this issue is very relevant giving to strong constraints in the resonator geometry design. In the talk, the phononic crystal concept is used to design, as an example, thickness resonators with “clean” resonances independently on the lateral dimensions. FEM simulation and electrical impedance and interferometric measurements of different geometries are shown.

Brief CV Prof. Francisco Montero de Espinosa

Researcher Professor since 2001, has 35 years of research experience with 118 research publications in SCI journals and more than 200 publications of meeting proceedings. He is the author of relevant articles as for instance, Nature(1), PRL(4), PRE(3),APL(3), JAP(1), Ultras(16), IEEE TRANS UFFC(9), Rheol(1), JRheol(1), JPH-D(3), MST(2). His scientific reputation in this field has led him to direct a large number of projects and research contracts. It is listed in the Essential Science Indicators, with 73 citations of his scientific papers in 2016, and around 1701 citations throughout his career (h index is 18). He has supervised 6 PhD students. He has also held management positions in the CSIC and the MEC as Head of the Physics and Mathematics section since 2006-2008, Vicepresident of Organization and Institutional Relationships and Chair of the Physics and Mathematics Committee, CNEAI.

New trends on the synthesis of piezoelectric lead free materials

María Elena Villafuerte-Castrejón
Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México (UNAM), México

On the search for lead free materials with piezoelectric properties, the synthesis methods play a determinant role on their final properties. Synthesis and processing of these materials is not quite simple and some challenges are yet to be faced.  Stoichiometric control, softer synthesis conditions, adequate grain size, ferroelectric domain size and distribution, sintering conditions and scalability for industrial transfer.

The most widely used piezoelectric is the PZT, but during the last two decades, due to environmental rules, the lead free materials have been intensely studied such as the featuring families with related perovskite structure: BaTiO3 (BT), Ba1-xCaxTi1-yZryO3 (BCZT), (Bi0.5Na0.5)TiO3 (BNT) and (K0.5Na0.5)NbO3 (KNN)

New trends on these methods involve the search of the most eco-friendly chemical way. In this work several routes to obtain these materials and their solid solutions with different cations are discussed.

Brief CV Prof. María Elena Villafuerte-Castrejón

MEV received the B.S. degree in Chemistry, the M. S degree in Inorganic Chemistry from Facultad de Química, Universidad Nacional Autónoma de México and the PhD degree in Science from Universidad Autónoma Metropolitana in México. She is working in Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, as  “Investigador Titular” and as  Professor in Facultad de Química. She won the Reconocimiento Sor Juana Inés de la Cruz, UNAM, on March, 2005. Her research interest is ceramic materials, their synthesis, crystal chemistry characterization, optical and electrical properties as ferroelectricity and piezoelectricity.

The influence of non-stoichiometry and chemical doping on the electrical properties of Na1/2Bi1/2TiO3 ceramics

Derek C Sinclair
Functional Materials & Devices Group,  Department of Materials Science & Engineering, University of Sheffield, Sheffield, UK.

We will review the structure-composition-property relationships of Na1/2Bi1/2TiO3 (NBT) materials based on a combination of A-site non-stoichiometry and chemical doping. Nominally Na-rich or Bi-deficient NBT ceramics (i.e. Na:Bi >1) are excellent oxide-ion conductors with oxide-ion transfer numbers (tion) exceeding ~ 0.9 at 600 oC whereas nominally Na-deficient or Bi-excess NBT ceramics (i.e. Na:Bi<1) are electrically insulating but retain tion ~ 0.1 at 600 oC. Undoped NBT ceramics should be viewed as mixed ion-electron conducting materials where the magnitude of the bulk conductivity and tion are heavily dependent on the nominal Na:Bi ratio in the starting composition. We attribute the source of oxygen vacancies in nominally stoichiometric NBT to be associated with low levels of Bi2O3-loss during ceramic processing.

Acceptor dopants such as Sr for Bi or Mg for Ti significantly increase the oxide ion conductivity to promote solid electrolyte behaviour whereas donor dopants such as Nb for Ti can suppress the oxygen vacancy concentration and exhibit excellent dielectric behaviour with tan d < 0.02 at 600 oC. Such behaviour is desirable for NBT-based dielectric applications, eg as Pb-free piezoelectrics and/or as a solid solution member in temperature stable, high permittivity multilayer ceramic capacitors (MLCCs) operating at > 175 oC.

Brief CV Prof. Derek C Sinclair

Derek is currently Professor of Materials Chemistry at the University of Sheffield. He was appointed to the academic staff at the University of Sheffield in 1999 as a Lecturer in Functional Materials following from Lecturer appointments in the Department of Chemistry, University of Aberdeen (1994-99) and the Department of Materials Science, University of Leeds (1993-94). He obtained his BSc (1st Class Honours) and PhD (supervised by Professor Tony West) in Chemistry at the University of Aberdeen and held post-doctoral research appointments at the University of Aberdeen (with Profs Tony West and John Irvine) and the Interdisciplinary Research Centre for Superconductivity at the University of Cambridge (with Prof Paul Attfield), before joining the academic staff at Leeds in 1993. He s a recognised for his ability to probe the structure (crystal and defect)-composition-microstructure-property relationships of a wide range of functional oxides, spanning from polar dielectrics via mixed conductors to solid electrolytes.

Cercedilla (Madrid) SPAIN
February 19 to 22, 2017.

Email:

piezo2017@icmm.csic.es