液料等离子热喷法制备Fe^(3+)/TiO_2纳米粉末  

Preparation of Fe^(3+)/TiO_2 nanopowders by plasma spraying with liquid feedstock

作　　者：徐大鹏[1] 雷阿利[1] 冯拉俊[1] 杨士川[1] 

机构地区：[1]西安理工大学材料科学与工程学院,西安710048

出　　处：《焊接学报》2008年第8期49-52,共4页Transactions of The China Welding Institution

基　　金：陕西省自然科学基金资助项目(2005E103)

摘　　要：通过对液料等离子热喷前驱物添加掺杂成分实现了液料等离子热喷TiO2纳米粉末的掺杂改性,并利用TEM,XRD及XPS对其进行表征。结果表明,采用液料等离子热喷法可以制备Fe3+掺杂TiO2纳米粉末,所制备粉末形貌基本呈球形或近球形,粒径分布为10~35nm,掺杂量小于2.0%时粉末为锐钛矿及金红石相混晶,Fe3+掺杂促进锐钛矿向金红石相的转变,掺杂量为10.0%时析出了Fe2Ti3O9相。Fe3+掺杂不会引起TiO2粒径的大范围波动。粉末中含有O,Ti,Fe和C等元素,Fe元素在TiO2中仍为+3价。TiO_2 nanopowders were modified through adding dopant material into precursor of liquid plasma spray. The powders were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The results showed that iron-doped TiO_2 nanopowders can be prepared by liquid plasma spray, the prepared powders is in the range of 10-35 nm with spherical shape or near spherical shape and the powders were composed of mixed crystal of anatase and rutile when iron content is less than 2.0%, Fe3+ accelerates the transition from rutile phase to anatase phase and Fe2Ti3O9 is precipitated when iron content is 10.0%. The iron doping can not cause long range waving of average crystallite size of powders. There are O, Ti, Fe and C elements in the prepared powders and the valency of Fe element is still +3.

关 键 词：TIO2 Fe3+掺杂 纳米粉末 液料等离子喷涂 

分 类 号：TQ134[化学工程—无机化工]