Effects of composition and phase relations on mechanical properties and crystallisation of silicate glasses

Crystallization, mechanical properties and workability are all important for commercialization and optimization of silicate glass compositions. However, the inter-relations of these properties as a function of glass composition have received little investigation. Soda-lime-silica glasses with Na2O-MgO-CaO-Al2O3-SiO2 compositions relevant to commercial glass manufacture were experimentally studied and multiple liquidus temperature and viscosity models were used to complement the experimental results. Liquidus temperatures of the fabricated glasses were measured by the temperature gradient technique, and Rietveld refinements were applied to X-Ray powder diffraction (XRD) data for devitrified glasses, enabling quantitative determination of the crystalline and amorphous fractions and the nature of the crystals. Structural properties were investigated by Raman spectroscopy. Acoustic echography, micro-Vicker’s indentation and single-edge notched bend testing methods were used to measure Young’s moduli, hardness and fracture toughness, respectively. It is shown that it is possible to design lower-melting soda-lime-silica glass compositions without compromising their mechanical and crystallization properties. Unlike Young’s modulus, brittleness is highly responsive to the composition in soda-lime-silica glasses, and notably low brittleness values can be obtained in glasses with compositions in the wollastonite primary phase field: an effect that is more pronounced in the silica primary phase field. The measured bulk crystal fractions of the glasses subjected to devitrification at the lowest possible industrial conditioning temperatures, indicate that soda-lime-silica glass melts can be conditioned close to their liquidus temperatures within the compositional ranges of the primary phase fields of cristobalite, wollastonite or their combinations

Towards a process reference model for research management: An action design research effort at an Australian university

Increasing emphasis in the Higher Education sector for high impact research has generated a proliferation of activities aimed at supporting university research processes, commonly referred to as ‘research management’. While there has been considerable growth in this new field, it remains an elusive area, with a lacuna on what comprises good ‘research management’. A lack of common terminology and definition of the activities comprised within research management limits the capacity to provide efficient services, properly share learnings and consistently assess the effectiveness of this work. This paper discusses the development of a research management reference model, through an Action Design Research (ADR) project conducted at a leading Australian university. The model defines 10 core domains (with areas of activities and processes within each) that constitutes the end-to-end research management process. The model was derived and validated across four ADR cycles of a detailed case study – which proved its potential value. Future research is planned to further validate the model in other universities, both within Australia and internationally

Governing by Evaluation : Setting the scene

This introductory chapter starts by outlining the aim of the book: to analyse and discuss the interplay between governing, evaluation and knowledge with an empirical focus on Swedish higher education. It then goes on to locate this aim and the intended contribution within the wider research context and in previous studies. The chapter also highlights some important national traits of the Swedish case and Swedish higher education policy development, before presenting the overall conceptual frame employed in the book and the project it builds on. Finally, an outline of the forthcoming chapters is provided