摘要
以XRD分析结果为基础,研究封闭氮气气氛下,纳米TiO2碳热还原制备Ti(C1-x,Nx)纳米晶粉末中主要工艺参数的作用。结果表明,在其它工艺条件不变的情况下,Ti(C1-x,Nx)的含氮量随反应温度、保温时间、原料重量、C/Ti值的增加而减小,随氮气压力的增加而增加。反应温度、保温时间对Ti(C1-x,Nx)纳米晶的晶粒度影响最大,反应温度高于1600℃,保温时间超过4 h,Ti(C1-x,Nx)纳米晶长大速度加快。
On the basis of X-ray diffraction analysis result, technological parameters in the preparation of nanocrystalline Ti(C1-x, Nx) via carbothermal reduction of nano TiO2 in close nitrogen atmosphere was studied. The results showed on condition that other technological parameters are fixed, nitrogen content of Ti (C1-x, Nx) decreases with the increment of reaction temperature, isothermal treatment time, starting powders weight, or C/Ti value except for nitrogen pressure. Reaction temperature and isothermal treatment time have a crucial effect on crystaUite size of nanocrystaUine Ti(C1-x, Nx). When the temperature exceeds 1600℃ or isothermal treatment time exceeds 4 h, the grain growth of nanocrystaUine Ti (C1-x, Nx) accelerates.
出处
《四川大学学报(工程科学版)》
EI
CAS
CSCD
北大核心
2006年第3期114-118,共5页
Journal of Sichuan University (Engineering Science Edition)
基金
四川省科技攻关项目(05GG009-020-03)
关键词
碳热还原
XPLD
固溶度
晶粒度
carbothermal reduction
X-ray diffraction
solubility
crystallite size