λ-Ti_3O_5粉体的制备及其光存储性能的研究  

Preparation and Optical Storage Properties of λ-Ti_3O_5 Powder

作　　者：刘刚[1] 黄婉霞[1] 易勇[2] 

机构地区：[1]四川大学材料科学与工程学院,成都610064 [2]西南科技大学极端条件物质特性实验室,绵阳621010

出　　处：《无机材料学报》2013年第4期425-430,共6页Journal of Inorganic Materials

基　　金：极端条件物质特性实验室基金(11zxjk01)~~

摘　　要：采用氢气还原纳米TiO2粉体制备了Ti3O5粉体,采用FTIR、XRD、SEM、UV-Vis等对原料及产物进行了表征。结果表明:加大通氢流量有利于还原反应的进行;以氧化硅包覆的纳米TiO2粉体(金红石型)为原料,1150℃下氢气还原1 h可合成单一物相组成的λ-Ti3O5粉体。对比自制未包覆处理的纳米TiO2,TiO2粉体的氧化硅包覆处理有利于λ-Ti3O5的形成;λ-Ti3O5与β-Ti3O5有较高的光学对比度,室温下,经适当的纳秒脉冲激光(532 nm,20 ns)处理,λ-Ti3O5会向β-Ti3O5发生转变,表现出较好的光存储性能。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.

关 键 词：λ-Ti3O5 粉体 还原 纳米TIO2 光存储 

分 类 号：TB383[一般工业技术—材料科学与工程]