通过甩带法制备 Fe-Si-B 非晶条带,并通过球磨法制备非晶粉。采用非晶粉对偶氮染料直接蓝2B进行脱色反应。通过亥姆霍兹线圈外加弱磁场,初步探究了磁场的大小、铁基非晶合金粉投加量对脱色性能的影响。发现在一定范围内增加磁场强度有利于脱色反应速率提高,磁场强度3980 A/m 下反应半衰期为5．0 min,比无磁场下脱色反应速率提高40％。随着非晶粉投加量的增大,磁场对脱色反应的促进作用呈现先增加后稳定的趋势。
Fe-Si-B amorphous alloy ribbons were melt-spun,and the amorphous powders were made by ball-mill-ing the ribbons.The azo dye direct blue 2B was decolorized by the amorphous alloy powders.We made aprelimi-nary study towards the weak magnetic field’s effect on the decolorization of azo dye by Fe-based amorphous alloy powders via manipulating the magnetic field intensity generated by the Helmholtz coils,the dosage of the amorphous alloy powders.It was found that within certain magnetic field intensity range,increasing the intensi-ty will result in the increase of decolorization rate.With H=3 980 A/m,the t1/2 was 5.0 min,and the decolori-zation rate was increased by 40% compared to that of H=0 A/m.With the increase of the Fe-based amorphous alloy powder dosage,the positive impact of the magnetic field on the decolorization rate was improved at firstand then stabilized.
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