S4: Festschrift to the Glass Research Career of Prof. Delbert E. Day
Session 1: The Mixed Alkali Effect and Ion Conducting Glasses
Organizer: David Sidebottom, Creighton University
Prof. Day devoted much of his early career to studying the mixed alkali effect in oxide glasses, including important contributions on internal friction, ion conductivity and thermal properties. His review article “Mixed alkali glasses – Their properties and uses,” J. Non-Cryst. Solids 21, 343-372 (1976), is the most highly cited paper authored by Prof. Day, and continues to be cited by researchers in the field. This session will include papers on the mixed alkali effect, as well as papers pertaining to ion-conducting glasses and relaxation phenomena.
Session 2: Phosphate Glasses: Their Structures, Properties and Applications
Organizer: Richard Brow, Missouri University of Science & Technology
Prof. Day has studied the properties of phosphate glasses and melts for many years, including early studies of ion conducting systems. More recently, he discovered that low-temperature iron phosphate glasses can incorporate large concentrations of a wide-range of different oxides in their structure, while retaining outstanding chemical durability, thus making them candidates for hosting nuclear wastes. This session will include papers on the iron phosphate glasses, with more general papers on the structure, properties and applications of other phosphate glasses.
Session 3: DTA and DSC Methods for Glass Crystallization Study
Organizer: Edgar Zanotto, Federal University São Carlos
Due to the facility and high speed of differential thermal analytical techniques, hundreds of papers about glass crystallization by these methods are published every year. There is thus scope for a serious brainstorming aiming at clarifying what sort of relevant quantitative information one can get from DTA and DSC techniques. For instance, is it really possible to determine crystal nucleation rates, crystal growth rates, overall crystallization, critical cooling rates, glass stability parameters, activation enthalpies, solidus and liquidus temperatures by DTA or DSC? With his colleague at Missouri S&T, Prof. Chandra Ray, Prof. Day has made important contributions to the use of differential thermal analytical techniques to characterize nucleation and crystallization kinetics, glass forming tendency and critical cooling rates for glassforming
melts. This session will include invited review talks as well as short presentations on the current state-of-the-art in characterizing nucleation and crystallization behavior by DSC and DTA methods.
In 1985, Prof. Day founded Mo-Sci Corporation, to produce glass microspheres used to treat inoperable liver cancer. More recently, Prof. Day, his students, and colleagues at Missouri S&T have shown that borate-based glasses possess remarkable transformation kinetics to bio-compatible materials, and have potential applications as scaffolds for bone defects and for soft tissue treatments, including wound healing. This session will provide a forum to present the results of basic and applied research on the use of glass and glass-ceramic materials in the areas of medicine and biotechnology. Appropriate topics include, but are not limited to: bioactive glasses and glass-ceramics, glass ionomer cements, dental materials, glass components of medical devices, biosensors, glasses for pharmaceutical packaging, glass-based microfluidics, and the interactions of biological systems with glass surfaces.