爆轰法制备二氧化钛微粉及表征

Explosive Synthesis and Characterization of Titanium Oxide

摘要:

采用爆轰法制备出主要含金红石型、锐钛矿型以及其混晶的二氧化钛粉末。粉末用X射线衍射（XRD）、比表面积（BET）等手段进行了表征。结果表明，产物的粒度大约为8．4nm～50nm，比表面积最大可达107．8m^2／g，平均孔径约6nm～15nm，产物的晶型主要为金红石型和锐钛矿型，粉末的粒度随炸药量的增加而增大，比表面积减小，孔的尺寸变大，同时产物中的金红石型含量增加，锐钛矿型含量减少。

Abstract:

Efficient process of explosion synthesis has been established for the synthesis of anatase and rutile as well as their mixtures. The powders were characterized by X-ray diffraction (XRD), BET surface areas. The results showed that the as-prepared grain size was from 8.4 nm to 50 nm, and the maximal SBET was 107.8 m2/g, the average pore size distribution of the sample was 6 nm to 15 nm. With increasing the proportion of detonator, the size of TiO2 crystallite increased, the BET surface areas decreased, the pore size increased, meanwhile the contents of rutile increased and anatase decreased.