Titanium Oxide Coatings Deposited on MnZn Ferrite by a Molten Salt Reaction

Abstract

Using molten salt reactions, Ti oxide coatings were successfully deposited on MnZn ferrite in a NaCl–KCl–K2TiF6 melt. The film formed on the surface of MnZn ferrite had a thickness of up to 20 μm and was composed of Ti oxides. The electric conductivity of the coatings was contributed to by the component Ti2O3 and depended on the concentration of Ti2O3 in the film. When the Ti2O3 content in the film increased, the surface resistance dropped to the order of 10−1 Ω/□. The conductive film had the potential to be welded to the metal electrode, thus confirming that the molten salt reaction method could be used as a pre-treatment to realize the metallization of MnZn ferrite.