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Meeting Materials Science & Technology 2019
Symposium Phase Transformations in Ceramics: Science and Applications
Presentation Title Investigations on the Glass Transition and Crystallisation Behavior of Glasses by Oscillatory Rheometry
Author(s) Christopher Giehl, Mario Kleindienst, Daniela Ehgartner
On-Site Speaker (Planned) Daniela Ehgartner
Abstract Scope The influence of heating and cooling rates, as well as the time-dependent relaxation behavior, are well-known processes related to the glass transition temperature. However, understanding of the energetic processes occuring near the glass transition and their thermodynamic or kinetic nature are an ongoing matter of debate. We here present quantitative mechanical data on the visco-elasticity of glasses near the glass transition temperature obtained from high temperature oscillatory rheometry. Such measurements provide the relative contributions of viscous and elastic moduli and provide insightful information on the strong or fragile character of glass melts. Frequency-dependent measurements allow to derive relaxation time spectra and the deformation-dependent isothermal glass transition. Furthermore, data from oscillatory measurements are capable to monitor the behaviour of metastable glasses, e.g. for unwanted crystallization or production of glass-ceramics.
Proceedings Inclusion? Definite: At-meeting proceedings

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Ferroelectric Phase Transition in Tungsten Trioxide Gas Sensors
First-principles Investigation of Phonon Instabilities and Displacive Phase Transitions in CaTiO3-perovskites
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In-situ Observations of Phase Transformations on Individual Particles of a Cu/Fe Oxygen Carrier during High-temperature Oxidation and Reduction Cycles
In-situ Phase Diagram Determination of the HfO2-Ta2O5-TiO2 Ternary Up to 3000 ˚C
In-situ X-ray Characterization of Phase Evolution during Solid-state Synthesis of Multicomponent Systems
In Situ Investigation of Stress-Induced Martensitic Transformation in Granular Shape Memory Ceramics
Influence of Annealing Temperature and Time on Phase Stability and Fracture Toughness of Rare-earth Stabilized Zirconia
Investigations on the Glass Transition and Crystallisation Behavior of Glasses by Oscillatory Rheometry
Meso- and Micro-structural Design and Processing of Shape-Memory and Superelastic Bulk Ceramics
Phase Transformations in High-entropy, Lanthanide Oxides
Phase Transitions in Hollandite Oxides with Nanoscale Chemical Ordering
Precipitation in Metal-Ceramic Systems Under Reducing Conditions
Prediction of Diffusionless Phase Transformation by Determination of the Orientation Relationship, Shear, and Motif Translation with the Smallest Atom Shuffles
Pseudo-single Crystal Growth of Cobalt Dititanate, an Entropy Stabilized Compound
Reactive Texturing of Yttria and Ceria TZP in a Strong Magnetic Field
Realizing Novel Defect Ordering in Yttria Stabilized Zirconia via Ion Radiation
Single Phase Spinel Produced from Powders of Alumina and Magnesia in Reactive Flash Sintering
The Effect of Zr4+ Co-Substitution on the Phase Transition and Thermal Expansion Properties of RENbO4 Materials (RE = La3+, Dy3+, Y3+)
Thermal Expansion and Phase Transformation Mechanism in the Lanthanide Di-titanate System
Topotactic Motif and Orientation Relation Extraction for Phase Transformations from In-Situ X-ray Powder Diffraction
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