退火温度对铁基纳米晶带材伏安特性的影响

Influence of annealing temperature on the Volt-Ampere characteristic of Fe-based nanocrystalline ribbon

采用不同的退火温度，在氩气保护下对制备的铁基纳米晶磁芯标样进行无磁场退火处理，用HD-1型伏安特性测试仪测试处理后的样品的伏安特性，并换算出磁导率，分析退火温度对铁基纳米晶带材伏安特性的影响。结果表明，退火温度对纳米晶带材伏安特性影响很大，535～555℃退火温度处理的样品性能较好。在任一磁场下，545℃退火纳米晶磁芯的磁导率均高于其它退火样品。其起始点、拐点、饱和点三点处的磁导率分别为μi=219000、μm=668000、μs=412000，得出545℃是铁基纳米晶带材伏安特性达到最佳的退火温度。

Fe-based nanocrystalline core samples were annealed in field-free argon atmosphere and at diferent temperatures. The Volt-Ampere characteristic of the annealed samples was tested by HD-1 type testing instrument for Volt-Ampere characteristic, and then was converted into permeability. According to the test results, the effect of annealing temperatures on the Volt-Ampere characteristic of Fe-based nanocrystalline ribbon was studied. The results showed that annealing temperature has great effect on Volt-Ampere characteristic of Fe-based nanocrystalline ribbon. The samples treated at temperature of 535℃ to 555℃ have good performances. The permeability of nanocrystalline cores annealed at 545℃, in any magnetic field, was higher than that of samples annealed at other temperatures, with μi= 219 000 at starting point,μm = 668 000 at inflection point, and μs=412 000 at saturation point. So, 545℃ can be considered as the optimal annealing temperature for Fe-based nanocrystalline ribbon.