Dear UFFC-S members,
We are excited to announce the launch of our UFFC-S Virtual Lecturer Education Series. The series will be presented via Zoom on 7 December 2021, 1 February 2022, and 1 March 2022. Registration is free and will be limited to the first 300 registrants per event. For information on each of the talks in the series and to register for each talk, please see below.
UFFC-S Education Committee
Cold Sintering of Functional Materials: A Path to a Possible Sustainable Future
Clive Randall, Pennsylvania State University
7 December 2021 at 11 AM EST (UTC -5:00)
Cold Sintering involves a transient phase that permits the densification of particulate materials at low temperatures 300 °C and below. Sintering at such low temperature offers so many new opportunities. It permits the integration of metastable materials that would typically decompose at high temperatures. So cold sinter enables a platform for better unification of material science. Now ceramics, metal and polymers can be processed under a common platform in one step processes. With controlling the forming process new nanocomposites can be fabricated. Polymers, gels and nanoparticulates can be dispersed, interconnected and sintered in the grain boundaries of a ceramic matrix phase. With the ability to sinter metal phases, multilayer devices can be co-sintered with electrodes made from metals such as Al, Ag, Fe and Cu. With appropriate binder selection, polypropylene carbonate and its de-binding at 130 °C we can remove organic binders and leave metals and other more stable polymers within the layers that then can be co-sintered under the cold sintering process and form unique combinations of materials in multilayers. This talk will cover some of the fundamentals of cold sintering, as well as some new examples of this technology across different material systems, ranging from ferroelectrics, semiconductors, and battery materials.
Clive A. Randall is a Distinguished Professor of Materials Science and Engineering and Director of the Materials Research Institute at The Pennsylvania State University. He has a B.Sc. (Honors) in Physics from the University of East Anglia, UK (1983), and a Ph.D. in Experimental Physics from the University of Essex, UK (1987). He was Director for the Center for Dielectric Studies 1997-2013, and Co-Director of the Center for Dielectrics and Piezoelectrics 2013-2015 (now Technical Advisor). Interests include discovery, processing, material physics, and compositional design of functional materials. Among his awards are Fellow of the American Ceramic Society, Academician of World Academy of Ceramics, IEEE Distinguished Lecturer, and Fellow of the European Ceramic Society. Prof. Randall has a Google h-factor of 85 and over 25,000 citations. Clive A. Randall is a Distinguished Professor of Materials Science and Engineering and Director of the Materials Research Institute at The Pennsylvania State University. He has a B.Sc. (Honors) in Physics from the University of East Anglia, UK (1983), and a Ph.D. in Experimental Physics from the University of Essex, UK (1987). He was Director for the Center for Dielectric Studies 1997-2013, and Co-Director of the Center for Dielectrics and Piezoelectrics 2013-2015 (now Technical Advisor). Interests include discovery, processing, material physics, and compositional design of functional materials. Among his awards are Fellow of the American Ceramic Society, Academician of World Academy of Ceramics, IEEE Distinguished Lecturer, and Fellow of the European Ceramic Society. Prof. Randall has a Google h-factor of 85 and over 25,000 citations.
Precision Metrology with Photons, Phonons and Spins: Answering Major Unsolved Problems in Physics and Advancing Translational Science
Michael Tobar, University of Western Australia
1 February 2022 at 8 AM EST (UTC -5:00)
The Quantum Technologies and Dark Matter research laboratory has a rich history of developing precision tools for both fundamental physics and industrial applications. This includes the development and application of novel low-loss and highly sensitive resonant photonic and phononic cavities, such as whispering gallery and re-entrant cavities, as well as photonic band gap and bulk acoustic wave structures. These cavities have been used in a range of applications, including highly stable low noise classical and atomic oscillators, low noise measurement systems, highly sensitivity displacement sensors, high precision electron spin resonance, and spin-wave spectroscopy, high precision measurement of material properties, and applications of low-loss quantum hybrid systems, which are strongly coupled to form polaritons or quasi-particles. Translational applications of our technology has included the realization of the lowest noise oscillators and systems for advance radar, the enabling of high accuracy atomic clocks, and ultra-sensitive transducers for precision gravity measurements.
Meanwhile, there is currently a world-wide renascence to adapt precision and quantum measurement techniques to major unsolved problems in physics. This includes the effort to discover “Beyond Standard Model” physics, including the nature of Dark Matter, Dark Energy, and the unification of Quantum Mechanics with General Relativity to discover the unified theory of everything. Thus, the aforementioned technology has been adapted to realize precision measurement tools and techniques to test some of these core aspects of fundamental physics, such as searches for Lorentz invariance violations in the photon, phonon and gravity sectors, possible variations in fundamental constants, searches for wave-like dark matter and test of quantum gravity. This work includes: 1) Our study and application of putative modified physical equations due to beyond standard model physics, to determine possible new experiments: 2) An overview of our current experimental program, including status and future directions. This includes experiments that take advantage of axion-photon coupling and axion-spin coupling to search for axion dark matter. High acoustic Q phonon systems to search for Lorentz violations, high frequency gravity waves, scalar dark matter and tests of quantum gravity from the possible modification of the Heisenberg uncertainty principle.
Professor Tobar leads the Quantum Technologies and Dark Matter Research Laboratory at the University of Western Australia (qdmlab.com). The lab is part of two nation-wide Australian Research Council Centres of Excellence, the Centre for Engineered Quantum Systems and the Centre for Dark Matter Particle Physics. His broad research interests encompass the disciplines of frequency metrology, precision and quantum measurements, low temperature, condensed matter, and quantum physics. Over his career he has developed a variety of measurement tools, allowing investigations in many areas of Physics and Engineering, leading to many prestigious awards. In particular, he has developed technologies to undertake precise tests of fundamental physics and has also adapted such technology to the commercial sector, which includes 12 patents on precision radar and detectors and over 300 refereed journal publications. He also leads the well-known ORGAN axion Dark Matter detector collaboration co-funded by both Centres, and in 2019 his group become an official collaborator of the famous Axion Dark Matter eXperiment situated at the University of Washington, Seattle.
Advances in Development and Applications of Piezoelectric Materials
Ahmad Safari, Rutgers University
1 March 2022 at 11 AM EST (UTC -5:00)
Piezoelectric lead zirconate titanate (PZT) in the form of bulk ceramic, single crystal, composite, and thin films have been used in sensors, actuators, and other electromechanical devices. However, the toxicity of these materials and their exposure to the environment during processing steps such as calcination, sintering, machining, as well as problems in recycling and disposal have been major concerns around the globe for the past few decades. The report of high piezoelectric activity in the ternary lead-free KNaNbO₃-LiTaO₃- LiSbO₃ and (Bi,Na)TiO₃-(Bi,K)TiO₃-BaTiO₃ /(Bi,Li)TiO₃ systems have given high hope for alternatives to PZT. Recent modifications of KNN-based compositions with BaZrO₃, NTK, and Bi₀․₅(Li 0.5 /Na₀․₅) TiO₃ results in excellent electromechanical properties increased further research and interest in Pb-free materials and brings hope for practical applications close to reality. The organization of this lecture is in the following three sections:
First, Pb-Based piezoelectric materials in view of their flexibility on a wide range of composition, processing/reproducibility, and outstanding electromechanical properties will be reviewed. Processing of piezoelectric ceramic with various densification methods as well as the development of novel design ceramic and composite by additive manufacturing will be discussed. The advantages and disadvantages of Pb-based ceramics in several applications will be emphasized.
In the second part of the talk, the latest development on KNN and BNT based composition with an emphasis on the development of reproducible BNT-based hard piezoelectric composition with high mechanical quality factor and soft piezoelectric with moderate electromechanical properties will be reviewed. The BNT-based hard composition outperformed the Pb-based piezoelectric in high power applications due to the higher coercive field and more stable Q with vibration velocity. The research study of low-temperature sintering of BNT based ceramic with Cu electrode using a combination of sintering aids and a controlled atmosphere opens an excellent opportunity for Pb-free multilayer actuators.
Lastly, the design, development, and excellent performance of piezoelectric and dielectric composite for ultrasound imaging, energy harvesting and storage, and high-power applications will be presented.
Ahmad Safari is a Distinguished Professor of the Department of Materials Science and Engineering, and Director of Glenn Howatt Electroceramic Laboratory at Rutgers University. His main field of interest includes structural property relationships in electro-ceramic materials for dielectric, piezoelectric, and ferroelectric applications, thin films, and ceramic - polymer composites for transducers, and additive manufacturing of advanced functional materials. He has published over 400 articles and book chapters and edited a book and has been granted 22 U.S. patents. He has advised over 50 senior undergraduate projects, over 30 post-doctoral research associates/visiting scientists, and graduated over 30 Ph.D. and MS students. He has presented over 600 plenaries, invited, and contributed talks at national and international conferences, workshops, universities, and industries. He is a Fellow of the IEEE UFFC-S Society, American Ceramic Society, and a member of the World Academy of Ceramics. His sustained and impactful contributions in structure-property relationships of ferroelectric and piezoelectric ceramics, composites transducers, and films have been recognized by multiple awards including IEEE-UFFC Robert E. Newnham Ferroelectrics award, IEEE UFFC-S Ferroelectrics Recognition award, the theUS-Japan scientific committee of the Dielectric and Piezoelectric Meetings US-Japan Bridge building award, and Rutgers University prestigious Donald H.Jacobs Chair in Applied Physics.
Ahmad Safari is the recipient of the IEEE UFFC-S Distinguished service award for his outstanding contribution to society for over 25 years in various capacities. He has been an active member of the AdCom for over 35 years in various positions including President, president-elect, VP of Ferroelectrics, executive member of AdCom, VP Symposia, Symposium General Chair for the Joint 2013 UFFC-EFTF and PFM Symposia, and the IEEE ISAF 96, and, TUFFC Associate Editor; member of Ferroelectrics Technical Standing Committee, and member of several UFFC-S AdCom committees including ISAF and IUS Technical Program, UFFC Bylaw, Fellow, Awards, Finance, and AdCom Emeritus. He has led the IEEE UFFC-S international delegation leader of the People-to-People Ambassador Program to China.