On the Electrochemical Reduction Mechanism of CaWO4 to W Powder

Erdogan, METEHAN; KARAKAYA, İSHAK

doi:10.1007/s11663-012-9689-4

On the Electrochemical Reduction Mechanism of CaWO4 to W Powder

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, cilt.43, sa.4, ss.667-670, 2012 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 43 Sayı: 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
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.667-670
Orta Doğu Teknik Üniversitesi Adresli: Evet

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.