GOMD 2011 Award Winners
|2011 Norbert J. Kreidl Award
Recipient: Randilynn Christensen
MSE, Iowa State University
Topic: “The Mixed Glassformer Effect in Sodium Borophosphate Glass”
Abstract: Energy storage is a growing concern in an ever increasingly battery driven society. Batteries power everything from cell phones to computers to medical devices. Development of safer, smaller, and longer lasting batteries is in demand. Ion conducting glasses are an important type of solid electrolytes that could be used to answer this need. Unfortunately, many known ion conducting glasses, such as binary lithium oxide glasses with conductivities in the 10-7 – 10-8 S/cm range, are not conductive enough for practical use1. In order for ion conducting glasses to be used as a commercial solid electrolyte, a method of increasing the glasses’ ionic conductivity must be found. According to V.K. Deshpande2, there are four methods of increasing ionic conductivity; increased modifier content, rapid quenching, addition of salts, and the used of mixed glass formers. While alkali mixed glassformer glasses such as Bi2O3+B2O3+LiO2 and Li2S+SiS2+GeS2 have shown increases in the alkali ion conductivity up to two orders of magnitude, the cause of this increase is unclear.3;4 This phenomena has become known as the Mixed Glass Former Effect (MGFE) and is defined by a non-linear, non-additive change in ionic conductivity. Although the MGFE has been observed in the literature, it has not been found to be universal, as it has not been observed in all mixed glass former (MGF) glasses and has also been seen as a negative or positive effect5-8. However, the effect of decreased conductivity with increasing modifier has been observed when the amount of modifier is varied. In order to engineer higher ionic conducting glasses by the MGFE, the cause of the MGFE must be found. A comprehensive study of the physical properties, structure, and the effect of composition on MGF glasses over multiple glass systems has been undertaken. This study will attempt to determine the cause of the MGFE, if that cause is universal, and the ion conduction method of the MGF glasses.
2011 George W. Morey Award
Recipient: Neville Greaves,
Director and Distinguished Research Professor, Institute of Mathematics and Physics, Aberystwyth University, and Distinguished Research Fellow, Department of Materials Science and Metallurgy, University of Cambridge, Old Schools
Topic: “Glass Structure, Ion Dynamics and the Pareto Principle”
Abstract: We know that glass is one of the oldest materials and yet one of the least understood. Nevertheless, with new concepts, experiments and atomistic modelling, major advances have been made in the last couple of decades which will be reviewed. Importantly, embedded in the macroscopic properties of glasses, and in the global averages of the dynamics of the supercooled liquids from which they derive, are cooperative phenomena. These distinguish “player” from “spectator” ions in correlated activity that defines the structural response, akin to the Pareto Principle whereby the most beneficial outcomes that govern an economy stem from the least number of causes.
2011 Stookey Lecture of Discovery
Recipient: Delbert Day, Curators’ Professor of Ceramic Engineering and Senior Research Investigator Graduate Center for Materials Research, Missouri University of Science and Technology
Topic: “Repairing the Body with Glass”
Abstract: With the discovery (Larry Hench) of bioactive silicate glasses some 40 years ago, there has been a growing interest in using silicate glasses to treat various medical conditions in humans. This presentation will describe three such applications, namely; the repair and regeneration of soft and hard (bone) tissue, the destruction (radioembolization) of malignant tumors and the healing of persistent wounds. Historically, silicate glasses have been of most interest, but recent results will be shown that indicate that borate glasses have unique properties for soft tissue applications.
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