摘要
采用高能球磨和晶化热处理方法制备钕铁硼吸波粉体,研究制备工艺对钕铁硼粉体吸波性能的影响。结果发现:高能球磨和适当晶化热处理可改善NdFeB粉体的组织结构、复介电常数和复磁导率;NdFeB粉体的反射率最小值为-15.5 dB,高能球磨48 h后粉体的反射率最小值降到-23 dB,高能球磨粉体经600℃晶化热处理后反射率最小值为-19 dB;高能球磨和晶化热处理可降低NdFeB粉体的吸收峰频率;高能球磨会使NdFeB粉体的吸波带宽变窄,经600℃晶化热处理后吸波带宽变宽,并且随着晶化热处理的温度升高,吸波带宽变得更宽。
The NdFeB absorbing powder was prepared by high-energy ball-milling and crystallization heat treatment.The preparation technology on the absorbing properties of NdFeB power was also studied.The result showed that the high-energy ball-milling and appropriate crystallization heat treatment could improve the crystallization structure of NdFeB powder,complex permittivity and complex permeability.The minimum reflectance of NdFeB powder was-15.5 dB.After high-energy ball-milling for 48 h,the minimum reflectivity of the powder went down to-23 dB.After crystallization heat treatment at 600 ℃,the minimum reflectivity of the milled powder was-19 dB.The high-energy ball-milling and crystallization heat treatment could reduce the frequency of the absorption peak of NdFeB powder.After high-energy ball-milling,the absorption band of NdFeB powder was narrowed.After crystallization heat treatment at 600 ℃,the absorption band of NdFeB powder was broadened.With increasing the crystallization heat treatment temperature,the absorption band of NdFeB powder became wider.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2010年第5期639-642,共4页
Journal of the Chinese Society of Rare Earths
基金
国家自然基金(50961005)
广西信息材料重点实验室主任基金(桂科能0710908-12-Z)资助
关键词
NDFEB
高能球磨
吸波性能
热处理
稀土
NdFeB
high-energy ball-milling
absorbing properties
heat-treatment
rare earths
