ANODIC-OXIDATION OF TITANIUM AT LOW VOLTAGES

A study of the anodic oxidation of titanium at low voltages ( < 50 V) in aqueous and non-aqueous electrolytes was carried out in order to ob tain thin films with dielectric properties. The reaction led, in both cases, to a microcrystalline structure of anastase (TiO2) with a diele ctric constant of approximately 40 and with capacitance values of the system Ti/TiO2/electrolyte between 10 and 13.9 muF V/cm2. The remainin g dielectric parameters of the films obtained in the non-aqueous solut ion suggest its possible use as a base in electrolyte capacitors.