Preparation and Optical Storage Properties of λ-Ti_3O_5 Powder

The Ti3O5powder was prepared by reducing TiO2 nanopartical in H2 atmosphere.The samples were investigated by powder X-ray diffraction(XRD),Fourier transform infrared spectroscope(FTIR),scanning electron microscope(SEM) and UV-Vis diffusion reflectance spectra(UV-Vis).The results show that,single phase Ti3O5 can be obtained by increasing the H2 flow.When H2 flow increases from 0.3 mL/min to 0.8 mL/min,the single phase λ-Ti3O5 can be synthesized using SiO2-coated TiO2(rutile,nanoparticle) as raw material at 1150℃ for 1 h.While using nano-TiO2 powders without SiO2-coated as raw material,the reduction product is multiphases composed of λ-Ti3O5 and β-Ti3O5.There is a high reflectivity contrast between λ-Ti3O5 and β-Ti3O5.When the multiphases sample is irradiated with 532 nm 20 ns-pulsed laser light at room temperature,Ti3O5 will transit from α phase to β phase,which shows a good optical storage performance.