摘要
用X-ray法研究了高能球磨制备Co-La_(2)O_(3)和Co-CeO_(2)催化剂纳米粉末过程中Co粉的微观应力与球磨时间的关系,发现两种不同晶型的稀土氧化物对Co粉微观应力的影响不尽相同,掺La_(2)O_(3)的粉末球磨到15h之内时,Co粉的微观应力随球磨时间的增加而增加,但在15-55h这段范围,微观应力随球磨时间的延长而增加的趋势变缓。掺CeO_(2)的Co粉的微观应力在研究时间范围内随球磨时间的增加几乎呈线性增加。
The relationship between micro stress and milling time for nano Co-LaO_(3) and Co-CeO_(2) catalyst fines prepared by high energy ball milling were studied with X-ray method.The influence on Co lattice strain was not the same for different crystal structure of rare earth oxide,La_(2)O_(3) and CeO_(2).The lattice strain and micro stress was increasing with the increasing of the milling time before 15 h.But in the milling period of 15-55 h,micro stress was almost unchanged with the increasing of milling time for La_(2)O_(3)-doped Co powder.The micro stress almost increased linearly with the increasing of milling time for CeO_(2)-doped Co powder.
作者
张淳
张泉
朱湘萍
廖树帜
张邦维
Zhang Chun;Zhang Quan;Zhu Xiangping;Liao Shuzhi;Zhang Bangwei(College of Mathematics and Computer Science,Hunan Normal University;College of Physics and Information Science,Hunan Normal University;International Centre for Materials Physics,Chinese Academy of Sciences;Department of Applied Physics,Hunan University)
出处
《上海金属》
CAS
2007年第2期16-19,共4页
Shanghai Metals
关键词
高能球磨
纳米Co催化剂粉末
微观应力
稀土氧化物
搀杂修饰
High Energy Ball Milling
Nano Co Catalyst Fines
Micro Stress
Rare Earth Oxide
Mingle Modification
