摘要
采用偏钛酸与炸药混合进行爆轰合成,制备出晶粒尺寸在10 nm到60 nm之间的纳米TiO2粉末。结合XRD、TEM、BET等表征手段,研究了纳米TiO2的制备参数与其晶粒尺寸和晶相结构之间的关系。发现当炸药含量增加时,产物晶粒尺寸增大,同时晶相结构随炸药量的增加逐渐由低温的锐钛矿型和板钛矿型向高温的金红石型转变,爆轰温度在这种转变过程中起着极为重要的作用。
Some TiO2 nanoparticle samples with size range from 10 nm to 60 nm were prepared by explosive synthesis method. The influence of the preparation parameters on the size and the crystalline phase of the TiO2 crystallite were studied by means of X-ray diffraction （XRD） technique,SEM,TEM and BET. With these characterizing methods,it indicates that the explosive temperature plays a very important role in the crystalline phase transformation. With increasing the proportion of detonator,the size of TiO2 crystallite increased,and the crystalline phase transforms from the low temperature phases of anatase and brookite to the high temperature phase of rutile.
出处
《高压物理学报》
EI
CAS
CSCD
北大核心
2006年第2期122-126,共5页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(10172025)
辽宁省自然科学基金(2004-40)
关键词
爆轰
纳米TIO2
晶粒尺寸
晶型转变
explosive
nanometer TiO2
crystalline size
crystalline phase transformation
