Experimental Study on the Control of TiO2 Nano-Powder Crystal Phases Prepared by the Hydrolysis-Sediment Approach
纳米二氧化钛粉体晶相控制实验研究

While preparing TiO2 nano-powder, different additives and the ratio of mixed additives were used as precipitants, different phases of crystalline and different ratios between rutile and anatase were gotten. The transitional temperature from anatase to rutile is different with the same preparing approach and different processing manner of TiO2 nano-powder. The crystal phase of TiO2 nano-powder is controlled by the type of precipitant, the ratio of different additives in the mixing solution and preparing approach. It is also determined by the interaction between the powder's face and the precipitants and the precipitant characteristics. It depends on the stability of the interface phase during the growth of powder.