文献类型：期刊文献

英文题名：Effect of sulfate on crystal phase transition and crystal growth of titanium dioxide in metatitanic acid calcination

作者：Chen, K.[1];Yan, X. H.[1];Wu, P. S.[2];Wang, Z. N.[1];Wu, B.[1];Lin, F. R.[2]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai, Peoples R China;[2]Longbai Sichuan Titanium Ind Co Ltd, Deyang, Sichuan, Peoples R China

年份：2021

卷号：94

期号：5

起止页码：353

外文期刊名：PHASE TRANSITIONS

收录：;EI(收录号：20212410486232);WOS:【SCI-EXPANDED(收录号:WOS:000657226600001)】；

语种：英文

外文关键词：Titanium dioxide; metatitanic acid; desulfurization; crystal phase transition; crystal growth; crystal morphology

摘要：In order to investigate the effect of sulfate in metatitanic acid on crystal transition and crystal growth of TiO2 during the calcination of metatitanic acid from sulfate process, ammonia was used to remove sulfate in metatitanic acid in this study. TG-DTA, XRD and SEM were used to analyse the crystal phase transition and crystal morphologies. Experiments showed that removal of sulfate will be beneficial to crystal transition and growth. In calcination of desulfurized metatitanic acid, both the solid-state crystallization and the phase transition from anatase to rutile have been advanced by 50 degrees C as compared to the control samples without desulfurization treatment. Moreover, the temperature can be reduced by 60 degrees C to achieve the same rutile conversion rate of 97.6%, and the particle size can be reduced by 70 nm. The reduction in calcination temperature greatly alleviates the sintering tendency of TiO2 and aid to produce TiO2 crystals of even size.