纳米TiO_2的光学特性及烧结行为

Optical Properties and Sintering Behavour of Nano-TiO_2 Powder

采用钛酸丁酯［Ti（OC_4H_9）_4］水解法制备了纳米TiO_2粉体，通过制备过程工艺参数的控制，获得了不同粒径和形貌的粉料．光反射谱研究表明，纳米TiO_2的吸收线系限与粉体的粒径和相结构密切相关；在30MPa和850℃进行热压烧结，得到了相对密度为93．3％，颗粒大小为200um左右的TiO_2块体．

Nano-titania was prepared by Ti(OC4Hg)4 hydrolysis precipition approach, its particle sizeand agglomeration can be controlled by adjusting some parameters of the process. Reflect spectrarevealed that the series limit of nano-titania was influenced by its particle size and crystal structureas well. Titania compact with a grain size about 200um and 93.3% relative density was obtainedvia hot-pressure sintering.