微量稀土La掺杂对FeCuNbSiB非晶带材压磁性能的影响  

Influence of trace of La addition on the piezomagnetic properties of FeCuNbSiB amorphous ribbons

作　　者：杨操兵[1] 朱正吼[1] 刘志宾[1] 黄伟兵[1] 徐雪娇[1] 

机构地区：[1]南昌大学材料科学与工程学院,江西南昌330031

出　　处：《功能材料》2010年第7期1247-1249,共3页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(60961001);国家科技支撑计划资助项目(2008BAE648B02)

摘　　要：采用单辊快淬法成功制备了微量稀土La掺杂的Fe73.5Cu1Nb3Si13.5B9非晶带材,并讨论了测试频率、测试温度和退火温度对带材掺杂La前后的压磁性能影响。研究表明,在相同条件下,与未掺杂La的带材相比,掺杂La后的带材的压磁效应增大,对微应力更敏感,且其热稳定性也增强。当测试频率在1kHz～1MHz内,带材的阻抗变化随着频率的增大而增大。当压应力在0～0.2MPa时,带材的ΔZ值随着压应力的增大而急剧增大,而在0.2～1.2MPa内,则趋于稳定。当测试温度在20～50℃内,带材的ΔZ值随着温度的升高而增大,且掺杂La的带材的温度稳定性得到明显改善,其温度系数αT由1.3×10-3Ω/℃变为2.68×10-4Ω/℃。在对带材进行退火处理后,其压磁性能有着较大的提高。A small amount of La added to Fe73.5Cu1Nb3Si13.5B9 amorphous ribbons was successfully prepared by single-roller method,and the influence of test frequency,test temperature and annealing temperature on the piezomagnetic properties of La-doped ribbons is investigated.It is found that the sensitivity and the thermostability of the piezomagnetic properties of La-doped ribbons significantly enhance as compared with the pure ribbons at the same condition.The stress-impedance of the ribbons increases as soon as increasing the test frequency in the range of 1kHz-1MHz.The Z of the ribbons dramatically increases with the increasing of stress in the range of 0-0.2MPa,while the trend of stable in the later range of 0.2-1.2MPa.When in the test temperature of 20-50℃,the Z of the ribbons increases with the rising of test temperature.The temperature stability of the ribbons remarkably improves as soon as trace of La doping to ribbons,and its temperature coefficient （αT） changes from 1.3×10-3Ω/℃ to 2.68×10-4Ω/℃.The piezomagnetic properties of ribbons greatly enhances,while annealing treatment to ribbons.

关 键 词：非晶带材 压磁性能 稀土 

分 类 号：TB34[一般工业技术—材料科学与工程] TG139[金属学及工艺—合金]