The effect of temperature on bulk flow properties of two different types of titanium dioxide powders has been measured at room temperature and 500 °C using the High Temperature Annular Shear Cell. A significant increase of the macroscopic bulk flow properties is observed with increasing temperature, in particular with regards to the unconfined yield strength. Two different theoretical modelling approaches are proposed with the aim to relate the observed experimental properties to the microscopic interparticles interactions. The final outcomes indicate that both models match the experimental data when appropriate values for the models’ parameters are employed. To this end, a sensitivity analysis for the main parameters of the models is implemented.
Analysis of titania powders flow properties at ambient and high temperature
BARLETTA, Diego;POLETTO, Massimo
2017
Abstract
The effect of temperature on bulk flow properties of two different types of titanium dioxide powders has been measured at room temperature and 500 °C using the High Temperature Annular Shear Cell. A significant increase of the macroscopic bulk flow properties is observed with increasing temperature, in particular with regards to the unconfined yield strength. Two different theoretical modelling approaches are proposed with the aim to relate the observed experimental properties to the microscopic interparticles interactions. The final outcomes indicate that both models match the experimental data when appropriate values for the models’ parameters are employed. To this end, a sensitivity analysis for the main parameters of the models is implemented.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
