On the Electrochemical Reduction Mechanism of CaWO4 to W Powder


Erdogan M. , KARAKAYA İ.

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, cilt.43, ss.667-670, 2012 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 43 Konu: 4
  • Basım Tarihi: 2012
  • Doi Numarası: 10.1007/s11663-012-9689-4
  • Dergi Adı: METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
  • Sayfa Sayıları: ss.667-670

Özet

The reduction mechanism of CaWO4 to W in molten eutectic CaCl2-NaCl electrolyte has been studied. Cyclic voltammetry and constant potential electrolysis tests were performed to determine the reversible cell potential. Analyses of the experimental results revealed that at least 2.2 V was required to compensate the potentials for the accompanying cell reaction and the electrode polarizations. A cell reaction was proposed by associating the experimental results and the Gibbs energy changes of the possible reactions.