【摘要】 采用改进的低温等离子体化学法,用无水TiCl₄在氧气氛中,制备了小于10nm非晶TiO₂超细粉末,通过XRD、TEM、TG-DTA和XPS等手段分析了反应条件对产物形态、粒径大小和组成的影响,研究了热处理条件与TiO₂晶化、晶型转变之间的关系,高于200℃时非晶TiO₂转化成具有锐钛矿结构的晶态。此外,还初步讨论了TiO₂超细粉末形成过程的动力学和电子辐照效应。更多还原

【Abstract】 Noncrystalline TiO₂ ultrafines with nano-size are synthesized from the system of anhydrous TiCl₄ and pure Oxygen by the chemical method of low-temperature plasma.The effect of the flow of all reactive gases or vapour on the shape, grain size and composition of TiO₂ ultrafines is discussed by means XRD, TEM, TG-DTA and XPS.The relation between the heattreatment temperature and crystallization of TiO₂ noncrystalline ultrafines, and crystalline shape transformation is studied.It is showed that the average diameter of the ultrafines is less than 10nm, and noncrystalline TiO₂ is changed to become crystalline state with anatase structure above 200℃. Besides authors also discuss the dynamics analysis of TiO₂ ultrafines formation process and study primarily electron radiation effect.更多还原