CHEMICAL-STABILITY OF SOLUTIONS OF NIOBIUM-V IN MOLTEN NACL-KCL AT 750-DEGREES-C

被引:9
作者
ARURAULT, L [1 ]
BOUTEILLON, J [1 ]
POIGNET, JC [1 ]
机构
[1] UNIV GRENOBLE 1,F-38041 GRENOBLE,FRANCE
关键词
32;
D O I
10.1149/1.2043859
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Solutions of Nb(V), mainly as K2NbF7, in molten NaCl-KCl at 750 degrees C, were studied by potentiometry, linear sweep voltammetry, chemical and x-ray analysis. Voltammograms at tungsten electrodes showed that the use of silica parts in contact with the melt had to be strictly discarded. The variations of the open-circuit potentials of tungsten or Vitreous carbon electrodes, recorded during several weeks, showed that the Nb(V) species was not stable and underwent slow reduction to Nb(IV). This hypothesis was reinforced by chemical and x-ray analysis of the frozen melts. Reduction of Nb(V) to Nb(IV) was fast and complete when niobium metal was introduced in the melt.
引用
收藏
页码:16 / 19
页数:4
相关论文
共 32 条
  • [1] ALABYSHEV AF, 1965, REFERENCE ELECTRODE, P139
  • [2] ALIMOVA ZA, 1990, ZH PRIKL KHIM, V63, P992
  • [3] ARURAULT L, 1992, THESIS INP GRENOBLE
  • [4] ASHKENAZI J, 1978, I PHYS C SER, V39, P695
  • [5] BALKE CW, 1945, T ELECTROCHEM SOC, V85, P89
  • [6] ELECTRODEPOSITION OF NIOBIUM FROM FLUORONIOBATE K2NBF7 SOLUTIONS IN FUSED NACL-KCL
    BARHOUN, A
    BERGHOUTE, Y
    LANTELME, F
    [J]. JOURNAL OF ALLOYS AND COMPOUNDS, 1992, 179 : 241 - 252
  • [7] NIOBIUM SUPERCONDUCTORS
    BETHOUX, O
    [J]. REVUE DE PHYSIQUE APPLIQUEE, 1970, 5 (03): : 495 - &
  • [8] PROBLEMS CONNECTED WITH PRODUCTION OF SUPERCONDUCTING NBTI ALLOYS
    BIDAULT, M
    DOSDAT, J
    [J]. REVUE DE PHYSIQUE APPLIQUEE, 1970, 5 (03): : 505 - &
  • [9] CADIEU FJ, 1978, I PHYS C SER, V39, P642
  • [10] CAPPELLETTI RL, 1978, I PHYS C SER, V39, P649