Electrochemical synthesis of iridium powder with high specific surface

Yu. P. Zaikov, A. V. Isakov, A. P. Apisarov, A. O. Nikitina

ABSTRACT:

The synthesis of iridium powder in molten NaCl–KCl media at 700°C was  carried out for the first time.  The effect  of the cathode and anode current density ratio (ik/iа) on structure and morphology of iridium powder was investigated. Single-phase and polycrystalline iridium powders with specific surface up to 16.8 m2/g were obtained. The phase composition and surface texture of the obtained deposits were studied. Dependences of specific surface and dendrite size of iridium powders from ik/iа ratio were analyzed.

KEYWORDS:

iridium, powder, molten salt synthesis, secondary recovering