6533b870fe1ef96bd12cfbdb
RESEARCH PRODUCT
Pressure dependence of density and structural relaxation of glass near the glass transition region
Linfeng DingBoris KausStephan BuhreClemens Kunischsubject
Materials sciencePiston-cylinder apparatus[ SPI.MAT ] Engineering Sciences [physics]/MaterialsThermodynamics02 engineering and technologyPressure dependence021001 nanoscience & nanotechnology01 natural sciencesFictive temperatureHigh pressureFictive pressureVolume (thermodynamics)High pressure0103 physical sciencesMaterials ChemistryCeramics and CompositesRelaxation (physics)Piston-cylinder apparatusGlass010306 general physics0210 nano-technologyGlass transitionStructural relaxationPressure celldescription
International audience; A simplified and effective pressure cell together with an experimental procedure has been developed and applied to compress samples of SCHOTT N-BK7 glass under static high pressures in a piston-cylinder apparatus. Results from the density and volume recovery measurements show that, the glass samples were effectively densified in piston-cylinder apparatus with the density at room temperature increasing linearly with frozen-in pressure. To explain the experimental data, we developed a mathematical model based on a suggestion by Gupta (1988) with two internal parameters, named fictive temperature (Tf) and fictive pressure (Pf), which fits the experimental data well.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2017-10-21 |