用部分中和法制备超细二氧化钛粉体

Preparation of ultrafine titania by a partial neutralization process

采用部分中和法制备超细TiO2 粉体 ,通过TEM、XRD和TG DTA对产品进行了表征 ,指出水合TiO2 在煅烧过程中逐步失去游离水和化合水 ,再形成TiO2 结晶 ,且随着煅烧温度的上升 ,颗粒的粒度迅速增大。在 6 0 0℃以下煅烧时所形成的TiO2 颗粒为锐钛型 ,在 80

Ultrafine titania was prepared by a partial neutralization process and characterized by TEM, XRD and TG DTA. It is shown that TiO 2 crystal is formed through the evaporation of free and chemically combined water from hydrated titania in the process of calcination and TiO 2 particle size increases rapidly with the increase in calcination temperature. Anatase was formed when the calcination temperature below 600?℃ whereas it transformed into rutile when the calcination temperature reached 800?℃.