摘要
以低浓度工业钛液为原料,采用自生晶种热水解工艺制备高纯二氧化钛,并以XRD、粒度分析、BET、TiO2含量测定等手段对偏钛酸和二氧化钛进行表征。水解条件对低浓度钛液的水解过程有着重要影响,适宜的诱导水量与水解时间有助于形成合适的水解晶种数量与质量,调控好水合二氧化钛的析出、晶粒生长、粒子生长与聚集,可获得较小平均粒径和比表面积的偏钛酸,进而减少杂质吸附,制得纯度高的二氧化钛。水解条件存在着内在的影响规律,结果表明,当诱导水量为60%、水解时间为120 min时,可制得纯度在99.97%以上的高纯TiO2。
High purity TiO2 was prepared via authigenic seed thermal hydrolysis route by using industrial low concentration titanyl sulfate solution as titanium source.The as-prepared metatitanic acid and TiO2 powders were characterized by XRD,particle size distribution,BET analysis and TiO2 content determination.The hydrolysis conditions had important influences on the hydrolysis process of low concentration titanyl sulfate solution.The appropriate amount of induced water and hydrolysis time were conducive to form appropriate quantity and quality of hydrolysis seeds,adjust and control the precipitation,crystal growth,particle growth and aggregation velocity of the hydrated titanium dioxide,which could obtain metatitanic acid with smaller average particle size and specific surface area.These effects were beneficial to reduce the adsorption of impurities and produce TiO2 with high purity.And the hydrolysis conditions had internal influencing relationship between them.The optimized hydrolysis conditions were the induced water volume ratio of 60%and the hydrolysis time of 120 min,and the high purity TiO2 over 99.97%content could be obtained.
作者
田从学
Tian Congxue(Panzhihua University,Panzhihua 617000,Sichuan,China)
出处
《钢铁钒钛》
CAS
北大核心
2020年第2期14-19,共6页
Iron Steel Vanadium Titanium
基金
国家自然科学基金(50804025)
四川省科技计划项目(2014JY0197)
攀枝花市科技计划项目(2018CY-G-16,20180816,201810)
四川省高校重点实验室项目(LYJ1907)
省、市级人才培养项目。
关键词
高纯二氧化钛
钛液
偏钛酸
诱导水量
水解条件
high purity TiO2
industrial titanyl sulfate solution
metatitanic acid
inducing water volume
hydrolysis condition
