The amorphous precursor alloys for nanostructure with high B_s always exhibit a low impurity tolerance, inhibiting mass production. Here, we comparatively studied the FeBSiCu, FeBPSiCu and FePSiCu alloy systems in Fe₈₃B_12-xP_xSi₄Cu₁ (x = 0–12) alloys made with industrial raw materials. Fully amorphous ribbons were readily prepared in the Fe₈₃B₁₂Si₄Cu₁ and Fe₈₃P₁₂Si₄Cu₁ alloys. It is difficult to avoid the surface crystallization induced by the impurities in Fe₈₃B_12-xP_xSi₄Cu₁ (x = 2–8) amorphous alloys with a relatively high amorphous formability. The Fe₈₃B₁₂Si₄Cu₁ alloy exhibits a large crystallization temperature interval (ΔT) which can be further widened by P micro-alloying. The macro-substitution of B by P will lead to a significant decrease of ΔT. The ΔT of the novel Fe₈₃P₁₂Si₄Cu₁ alloy can be effectively widened by increasing the Fe content and microalloying of B, exhibiting a good potential for the combination of superior ΔT, AFA and impurity tolerance. The low impurity tolerance in the Fe₈₃B_12-xP_xSi₄Cu₁ alloys is ascribed to the significant difference in the metallurgical properties of the Fe–B and Fe–P alloys, needing new impurity purification processes. These results will bring a new perspective to develop high B_s precursor alloys and experimental references for critical industrialization.

用于具有高B _{s 的}纳米结构的非晶前体合金总是表现出低杂质耐受性，阻碍了大规模生产。在这里，我们比较研究 了用工业原料制成的Fe ₈₃ B _{12- x} P _x Si ₄ Cu ₁ ( x = 0–12) 合金中的 FeBSiCu、FeBPSiCu 和 FePSiCu 合金系统。在 Fe ₈₃ B ₁₂ Si ₄ Cu ₁和 Fe ₈₃ P ₁₂ Si ₄ Cu ₁中很容易制备完全非晶带合金。Fe ₈₃ B _{12- x} P _x Si ₄ Cu ₁ ( x  = 2–8) 非晶合金中的杂质难以避免表面结晶，具有相对较高的非晶成形性。Fe ₈₃ B ₁₂ Si ₄ Cu ₁合金具有较大的结晶温度区间( ΔT )，可通过P微合金化进一步拓宽该温度区间。P 对 B 的宏观替代将导致 Δ T显着降低。该Δ Ť新颖的Fe ₈₃ P ₁₂的Si ₄Cu ₁合金可以通过增加Fe含量和B的微合金化来有效加宽，表现出优异的ΔT、AFA和杂质耐受性的良好组合。Fe ₈₃ B _{12- x} P _x Si ₄ Cu ₁合金的低杂质耐受性归因于Fe-B 和Fe-P 合金冶金性能的显着差异，需要新的杂质净化工艺。这些结果将为开发高B _s前驱体合金和关键工业化的实验参考带来新的视角。