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根据本人的工作评述了国外电化学离析γ″-Ni_3Nb、δ-Ni_3Nb的方法及其在不同电解液中的电化学行为。测定了它们的化学组成式。电化学离析γ″、δ相的电解制度选用1%(NH_4)_2SO_4+2%C_4H_6O_6的水溶液是最好的,i为0.02安/厘米~2,t<20℃。国外许多相分析工作者推荐的离析δ-Ni_3Nb的电解液:50毫升HClO_4+20克C_6H_8O_7+11.9克HCl+1000毫升CH_3OH以及NH_4Cl-葡萄糖-HCl-H_2O系电解液对于离析较弥散的δ-Ni_3Nb是不适宜的。
Based on my work, the methods of electrochemical separation of γ “-Ni_3Nb, δ-Ni_3Nb and their electrochemical behaviors in different electrolytes were reviewed. Their chemical compositions were also determined. Electrochemical separation of γ”, δ-phase electrolysis The best aqueous solution of 1% (NH_4) _2SO_4 + 2% C_4H_6O_6 is chosen as the system, i is 0.02 A / cm 2, t <20 ℃. Electrolytes for isolating δ-Ni_3Nb recommended by many foreign phase analysts: 50 mL of HClO_4 + 20 g of C_6H_8O_7 + 11.9 g of HCl + 1000 mL of CH_3OH and NH_4Cl-glucose-HCl-H_2O-based electrolytes For the more dispersed δ-Ni_3Nb Is not suitable.