: Sintering and physicochemical properties of titania
: Ibticem Ayadi
: Volume 3 (2016)
: The sintering behavior and the mechanical properties of titania have been investigated. The characterization of titania before and after the sintering process was realized by the differential thermal analysis, the dilatometry, the X-ray diffraction, the infrared spectroscopy and the scanning electron microscopy. The mechanical performances of titania increased with both the sintering temperature and the length of the sintering times. At 1000°C, the mechanical properties of titania reached their maximum value. Thus, the optimum value of the rupture strength reached 7MPa, whereas Vickers hardness attained 340 Hv; the shear modulus and Young’s modulus registered optimum values: 10.5GPa and 23.1GPa, respectively. Above 1000°C, the mechanical properties and the densification of titania are hindered by the allotropic transformation of titania. Thus, the allotropic transformation of titania from anatase phase to rutile phase was totally achieved after the sintering process at 1000°C for 300 minutes.