【摘要】 硫酸溶解钛铁矿经处理形成钛液 ,在钛液进行常压水解时 ,加入SnCl2 与钛盐制成的复合晶种 ,引入质量分数为 7 0 %的SnO2 作为晶型转变促进剂 ,能有效地使锐钛矿型TiO2 转变为金红石型 ,TiO2 的晶型转变温度降低到 870℃ ,并大大缩短完成晶型转变所需时间 ,避免物料烧结 ,得到大小适中 ,外形规整 ,光学性能良好的金红石型TiO2 。研究还发现 ,在盐处理时加入质量分数为 0 5 %的Zn2 + ,进一步加快了晶型转变过程。更多还原

【Abstract】 The titanate solution has been prepared by dissolving ilmenite in sulfuric acid. A composite crystal seed was obtained from titanate solution and stannous dichloride in the course of hydrolysis of titanate solution under atmosphere pressure, using stannic oxide(7.0% in mass fraction) as an accelerant. Thus the temperature of crystal phase transition from anatase to rutile titania was decreased to 870 ℃, the time for complete phase transition was shortened evidently. It was also found that introducing 0.5%(mass fraction) zinc ions in the salt treatment process could further shorten the phase transition time.更多还原