用工业钛液制备纳米偏钛酸的影响因素
来源期刊：中南大学学报(自然科学版)2006年第1期
论文作者：于延芬 柴立元 彭兵 韦顺文 苏维丰 苑春
文章页码：52 - 57
关键词：工业钛液;纳米偏钛酸;热水解法;水解因素
Key words：industrial titanium sulphate solution; nano-metatitanic acid; thermohydrolysis; hydrolysis factors
摘 要：以廉价的工业TiOSO4溶液为原料,通过热水解法制备纳米二氧化钛的前驱体偏钛酸(H3TiO3)。研究钛液酸度、钛液浓度、水解时间和水解温度等主要因素对TiOSO4溶液水解率和偏钛酸粒径的影响。采用激光粒径分析仪对偏钛酸粉末粒径及粒径分布进行检测;采用透射电镜观察偏钛酸的形貌和粒径。研究结果表明:水解条件直接影响偏钛酸的粒径及其分布,其中,钛液酸度的影响最大;水解条件对TiOSO4水解率和偏钛酸粒径的影响存在着最佳结合点,即当c(H+)为2.6~2.8 mol/L,ρ(TiOSO4)(按TiO2计)为25~28 g/L,水解时间为60 min,水解温度为125℃时, TiOSO4的水解率可达95%以上,得到的偏钛酸呈球形且粒径为40 nm。
Abstract: The nano-meter particle of metatitanic acid was prepared by thermohydrolysis method with industrial titanic solution. The effects of process parameters including acidity, TiOSO4 concentration, temperature of hydrolysis and time of hydrolysis on the yield of TiOSO4 solution and the particle size were studied by using laser diffraction particle size analyzer(LPA) and transmission electron microscope(TEM). The results show that the particle size of H3TiO3 and the yield of the TiOSO4 are affected by the technical parameters of hydrolysis, and the parameter of acidity has the strongest effect. There exists the optimum technical parameters about the effects of hydrolysis conditions. When the concentration of H+is 2.6 2.8 mol/L, the concentration of TiOSO4 is 25 28 g/L, the time of hydrolyzation is 60 min and the temperature of hydrolyzation is 125℃respectively, the yield of TiOSO4reaches 95%, the particle size of H3TiO3 is less than 40 nm, and the powder of H3TiO3 is spheral.
