ACerS Special Lectures at MS&T16
|ACerS/NICE Arthur L. Friedberg Ceramic Engineering Tutorial and Lecture|
Monday October 24, 2016 | 9:00 – 10:00 a.m.
Salt Palace Convention Center | Room: 255B
Aldo R. Boccaccini, Institute of Biomaterials, University of Erlangen-Nuremberg, Germany
Title: Bioactive glasses in soft tissue repair: What do we know so far?
Abstract: Bioactive glasses (BGs), following their discovery by the late Professor Hench more than 40 years ago, have mainly been applied for the regeneration and repair of hard tissues, i.e. bone and teeth. Interestingly, many of the biochemical reactions involved in the interaction of BGs with body fluids, in particular the local increase in concentration of various ions at the glass–tissue interface, are also relevant to a series of cellular mechanisms involved in soft tissue repair. Hence, an increasing number of research teams have been investigating the interaction of BGs with soft tissues. This lecture will consider in vitro and in vivo evidence that demonstrates the suitability of BGs for soft tissue repair, including as relevant examples, wound healing and nerve regeneration. In addition, the cellular effect of BGs in promoting the vascularization of tissues, which is crucial for the success of tissue engineering strategies, will be highlighted. The lecture will discuss the variety of BG compositions and morphologies being investigated. The current state of knowledge of the active mechanisms of interaction of BGs and soft tissues, including the effect of biomechanical stimuli on the soft tissue–BG bonding will be discussed, highlighting the areas requiring further research. In future, the design of BGs that interact with the ideal physiological conditions in the body to maximize the regenerative potential of tissues should lead to novel therapies to tackle unmet medical needs.
Session Chair: Ricardo Castro, University of California, Davis
|ACerS Richard M. Fulrath Award Session|
Monday October 24, 2016 | 2:00 – 4:40 p.m.
Salt Palace Convention Center | Room: 255B
2:00 – 2:40 p.m. Japanese Academic
Tadachika Nakayama, Nagaoka University of Technology, Japan
Title: Ceramics/polymer hybrids and their processing with nanopulsed power technology
Abstract: Linear bundles of boron nitride (BN) nanosheets were fabricated in polysiloxane/BN nanosheets hybride film by electrophoresis under alternating DC electric fields with no modification of BN surface. BN nanosheets were homogeneously dispersed into a pre-polymer polysiloxane mixture by sonication and by mixing with high-speed mixer. The homogeneous suspension was cast on a polyimid spacer (120 mm in thickness) and subjected to DC electric field of 2.3 kV before the mixture was cured through polymerization. The direction of electric flux was shifted according to time interval from 1h to 16h during electric field application. Scanning electron microscope, X-ray diffraction, UV-vis light transmission and digital microscope were used for analys of surface morphology and anisotropic arrangement of BN nanosheets in polymer matrix. BN nanosheets were assembled into linear bundles extending across the space between two ITO coated electrodes and some of them formed brides connecting the electrodes. We could confirm that each BN nanosheet composing the linear bundles show the high anisotropic alignment which is aligned parallel to electric flux and perpendicular to the electrode surface. The mechanism of relocation and anisotropic alignment of BN nanosheets will be explained by electrostatic energy, coulomb attraction and dipole moment. The techniques controlling the anisotropic alignment and fabricating linear bundles BN nanosheets in an electric field opens new ways to both electrical and thermal contacts in nano- to micro devices.
2:40 – 3:00 p.m. Japanese Industrial #1
Yoshiki Iwazaki, TAIYO YUDEN CO., LTD., Japan
Title: Material design of dielectric and piezoelectric materials with first-principles calculation
Abstract: First-principles calculation is now a powerful tool for the study of material not only for material analysis but for material design as well. In this presentation, the application of first-principles calculation for dielectric and piezoelectric materials, especially, a design of AlN based new piezoelectric material will be focused. The new nitride piezoelectric material is characterized with co-doping of different valence-cation dopants at the Al site of AlN, such as simultaneously doped Mg2+ and Zr4+, Hf4+. The d33 value of the co-doped AlN reaches or exceeds the previously discovered Sc3+ doped AlN, and the performance of the new material is also confirmed by thin-film deposition experiments with reactive sputtering equipment. Our study shows that the co-doping technique opens a new way for the realization of high-performance AlN based piezoelectric materials.
3:00 – 3:20 p.m. American Industrial
James G. Hemrick, Reno Refractories Inc.
Title: A future for refractory ceramic technology based on a rich past
Abstract: This talk will begin by providing a brief history of refractory ceramic materials and how these materials contribute to improving energy efficiency of traditional manufacturing processes. This background will be used to show how the past and present energy and economic circumstances are shaping the future of refractory technology and will present one path forward for future refractory development and application.
3:40 – 4:00 p.m. Japanese Industrial #2
Tomoyuki Nakamura, Murata Manufacturing Co., Ltd., Japan
Title: Development of dielectrics for monolithic ceramic capacitor
Abstract: Monolithic ceramic capacitors (MLCCs) are used extensively throughout the electronics industry. In this report, two dielectrics for MLCC are described. Developments of the MLCCs have been mainly focused on increasing the volumetric efficiency of capacitance with thinning the dielectric layers, because the efficiency increases in proportion to the inverse square of the dielectric layer thickness. On the other hand, the electric field intensity increases in inverse proportion to the dielectric thickness. This involved a lot on the reliability of the capacitors. To achieve enough reliability of MLCC with high capacitive volumetric efficiency, it is important to know the contribution of grain boundary and grain interior to its reliability. Grain boundary plays an important role in the resistance degradation behavior of dielectrics. To improve the degradation resistance of grain interior, Ca-doped BaTiO3-based dielectrics were developed.
Capacitors used for power electronics must have stable capacitance under higher DC biasing field and higher allowable ripple current. However, it is difficult for MLCCs of general purpose to implement these characteristics. General purpose products are not suitable for power electronics in terms of the material characteristics because of large drop in capacitance under high DC biasing voltage or heat generation caused by high dielectric loss. Therefore, BaTiO3-based non-reducible low-loss dielectrics for power electronics were developed. Large amount of rare earth element addition was investigated in BaTiO3-rare earth element-Mg system. Gd is suitable to assure both high capacitance under DC biasing field and low-dielectric loss with ripple current.
4:00 – 4:40 p.m. American Academic
Bryan D. Huey, University of Connecticut
Title: High-speed and tomographic AFM of functional materials
Abstract: Atomic Force Microscopy has become a ubiquitous tool for nanotechnology since its invention 30 years ago. As a scanning probe method, however, it has obviously been limited to studies of static surfaces. Enhancing imaging speeds by up to 1000x, though, makes high throughput, multiparameteric, and dynamic investigations feasible. Leveraging AFM imaging at rates on the order of frames per second has thereby achieved high resolution maps of mechanical, electronic, piezoelectric, conducting, and photoconducting properties, each as a function of temperature, bias, illumination intensity or wavelength, etc. Ferroelectric domain dynamics in polycrystalline piezoelectric actuators, for example, reveal deleterious contributions from grain boundaries but engineering enhancements at free (strain relieved) surfaces. Extending such advanced AFM approaches still further, and coupling them with increasing progress and interest in plan-view and cross-sectional milling for sub-surface studies, then enables ‘Computed Tomographic AFM.’ Based on hundreds of images through the thickness of a specimen, such CT-AFM uniquely resolves nanoscale features and materials properties in all 3-dimensions. Examples include the first nanoscale maps of photoconduction pathways and interconnections throughout operating polycrystalline solar cells, as well as grain and orientation dependent mechanical properties for ceramic thin films. Related investigations of VO2 thermochromics, carbon fiber composites, and the new class of mixed halide perovskites (MAPbI3) are also presented demonstrating the wide opportunities provided by such high speed and now tomographic AFM.
Session Chair: Man F. Yan, OFS Laboratories
|ACerS Alfred R. Cooper Award Session|
Monday, October 24, 2016 | 2:00 – 5:00 p.m.
Salt Palace Convention Center | Room: 255A
2016 Alfred R. Cooper Distinguished Lecturer | 2:00 p.m.
Neville Greaves, Wuhan, University of Technology, China; and Cambridge University, U.K.
Title: Where inorganic meets organic in the glassy state: hybrid glasses and dental cements
Abstract: For more than 50 years oxide glasses have given territory to semiconducting, metallic and organic glasses emerging from the major fields of crystalline condensed matter science. It should therefore come as no surprise that the recent exciting development of metal organic framework (MOF) materials might also proffer a range of glasses (Nat. Comm. 6 8079 (2015)). Initially produced by amorphization close to the glass transition or under modest pressure, such hybrid glasses can also be formed conventionally by melt-quenching, provided their crystalline precursors melt first before decomposing. Structurally their low density networks comprise tetrahedral metals bridged, not by oxygens or chalcogens, but by organic ligands such as imidazolates. Similar geometries occur at glass-polymer interfaces in composites, such as glass ionomer cements (Nat. Comm. 6 8631 (2015)), where aluminiums at the surface of glass particles chelate with carboxyl groups from the surrounding polyacrylic acid. In each case hybrid bridges dictate mechanical properties.
2016 Alfred R. Cooper Scholar award presentation | 3:40 p.m.
Matthew A. Tuggle, Center for Optical Materials Science and Engineering Technology; and Clemson University
Title: Novel approaches to glass optical fibers
Abstract: All voice and data communications employ silica glass optical fiber at some point in their nearly-instantaneous transmission. Additionally, optical fibers specifically, and lasers more generally, are used in countless applications beyond communications, including medicine, energy, manufacturing, sensing, transportation, entertainment, and as tools for scientific inquiry. Conventional optical fiber materials and fabrication methods are proving unable in many circumstances to keep up with the performance requirements demanded by these uses. As a result, considerable global attention in recent years has focused on new draw techniques for fibers with novel core materials. The molten core method, adopted widely now around the world, as a means to realize long lengths of silica-based optical fibers with core glass compositions that were previously thought to be impossible to incorporate into a fiber, will be discussed. There will be several examples, including crystalline yttrium aluminum garnet-derived all-glass optical fibers, synergistically including reactive metallic precursors to yield novel fibers with enhanced performance.
|ACerS Edward Orton Jr. Memorial Lecture|
MS&T16 Plenary Session
Tuesday, October 25, 2016 | 8:00 – 10:35 a.m.
Salt Palace Convention Center | Room: Ballroom A-D | 9:00 a.m.
Bruce Dunn, University of California, Los Angeles
Title: Designing Ceramics for Next-Generation Energy Storage Systems
Abstract: The ability to design the chemistry and nanostructure of ceramics is already having a profound effect on the performance of electrode materials for electrochemical energy storage and will continue to do so in the future. One significant contribution to the lithium-ion battery field has been the development of nanoscale materials whose shorter ion and electron path lengths have led to improvements in energy and power densities. The development of core-shell architectures represents another substantial advancement in the design of electrode materials. In particular, the use of electronically conducting shells provides a unique opportunity for transforming poorly conducting oxides into electrochemically active materials. Another important development is in the field of capacitors. Pseudocapacitors based on transition metal oxides offer the promise of a new generation of energy storage materials that combine the high power of capacitors and the high energy density of battery materials. In addition to key advances in the field, a number of future directions will be presented.
|ACerS Frontiers of Science and Society – Rustum Roy Lecture|
Tuesday, October 25, 2016 | 1:00 – 2:00 p.m.
Salt Palace Convention Center | Room: 255B
Cato T. Laurencin, University of Connecticut
Title: Regenerative engineering: a convergence approach to next-generation grand challenges
Abstract: The next ten years will see unprecedented strides in regenerating musculoskeletal tissues. We are moving from an era of advanced prosthetics, to what I term regenerative engineering. In doing so, we have the capability to begin to address grand challenges in musculoskeletal regeneration. Tissues such as bone, ligament, and cartilage can now be understood from the cellular level to the tissue level. We now have the capability to produce these tissues in clinically relevant forms through tissue engineering techniques. Our improved ability to optimize engineered tissues has occurred in part due to an increased appreciation for stem cell technology and nanotechnology, two relatively new tools for the tissue engineer.
The integration of ceramics into the regenerative engineering paradigm presents important opportunities to tailor-make materials that not only meet functional requirements for the creation of conductive materials, but allow for the creation of next generation materials that are inductive in nature. It is the convergence of technologies that will allow new science and new technologies to occur.
|ACerS Robert B. Sosman Lecture|
Wednesday, October 26, 2016 | 1:00 – 2:00 p.m.
Salt Palace Convention Center | Room: 255B
Jennifer A. Lewis, Harvard University
Title: Programmable assembly of colloidal suspensions
Abstract: We have developed programmable assembly routes for patterning colloidal films, granules, and 3-D architectures. Each route relies on engineering the phase transitions, structure, rheology, and drying behavior of concentrated colloidal suspensions. Several examples from our research will be highlighted. First, we will show how patterned colloidal films can be created via evaporative lithography. Second, we will highlight the microfluidic assembly of colloidal granules and other micro-components with controlled composition, shape, and size. Finally, we demonstrate the fabrication of 3-D ceramic architectures via direct-write assembly of colloidal inks.
Session Chair: Carlos Martinez, Purdue University