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本文提出一种适用于工厂实验室条件的钕铁硼永磁合金的化学分析方法。方法简单实用,准确度和重复性均好。 钕铁硼四方相的化学式为Nd_(15)Fe_(77)B_8。按此组成,含量应分别为:Nd％=33.02,Fe％=65.66、B％=1.32。因无法取得钕铁硼的标准试样,我们按这一含量比分别用分析纯的NdCl_3、FeCl_3和H_3BO_3试剂配制成1ml含25.01mgNd,1ml含49.73mgFe,1ml含1.00mgB的标准溶液,这三种溶液等体积混合即可得到相当于钕铁硼四方相的标准模拟试样。我们的测定方法就是用这样的模拟试样制定的。数据证明在每100ml试样溶液中含硼0.50～3.00mg范围内应用本法能取得最好效果。Nd、Fe和B测定的最大相对误差分别为0.2％、0.1％、1.5％。
This paper presents a chemical analysis method suitable for NdFeB permanent magnetic alloys in laboratory conditions. Method is simple and practical, accuracy and repeatability are good. NdFeB tetragonal phase chemical formula Nd_ (15) Fe_ (77) B_8. According to this composition, the content should be: Nd% = 33.02, Fe% = 65.66, B% = 1.32. Because we can not get the standard sample of NdFeB, according to this content ratio, we use analytically pure NdCl_3, FeCl_3 and H_3BO_3 reagents to prepare 1ml containing 25.01mgNd, 1ml containing 49.73mgFe, 1ml containing 1.00mgB standard solution, the three The same volume of solution mixing can be obtained equivalent to the standard sample of NdFeB tetragonal phase. Our method of measurement is to use such a simulation sample developed. Data show that in every 100ml sample solution boron 0.50 ~ 3.00mg range of this method can achieve the best results. The maximum relative errors of Nd, Fe and B were 0.2%, 0.1% and 1.5%, respectively.