16924-03-1Relevant articles and documents
Electrochemical behaviour and codeposition of titanium and niobium in chloride-fluoride melts
Polyakova,Taxil,Polyakov
, p. 244 - 255 (2003)
Niobium-titanium alloys can be prepared by codeposition in NaCl-KCl-NaF melts. The electrochemical behaviour of niobium and titanium is investigated first separately, then together, using the following methods: linear sweep voltammetry, semi-integration and semi-differentiation of cyclic voltammograms, and square-wave voltammetry. The reduction process of niobium (V) and titanium (IV) are, respectively, NbV→NbIV→Nb and Ti IV→TiIII→Ti. Each of the first steps proceeds in the same potential range whereas niobium metal is obtained at more positive potential than titanium. In the case of mixtures of Ti and Nb ions in the melt, the electrochemical curves derive from the addition of each separated system and show three peaks (NbV→NbIV and Ti IV→TiIII; NbIV→Nb; Ti III→Ti) in the cathodic sense. Codeposition of Nb-Ti alloys was prepared by galvanostatic electrolysis and further analysed with a microprobe.
Isolation of niobium, tantalum, and titanium complex fluoride salts with alkali metal cations
Nikolaev,Kirichenko,Rys'kina
, p. 1070 - 1075 (2009/12/06)
Fluoride and oxofluoride salts of niobium, tantalum, and titanium were isolated. They precipitated from aqueous solutions and upon washing of organic extracts with aqueous solutions of ammonium, potassium, and sodium salts. The compositions of the isolate
