Electrical Conductivity of Titanium Oxide (Rutile) Plasma Sprayed Coatings(Physics, Process, Instrument & Measurement)

概要

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Plasma spraying has been used to prepare n-type polycrystalline TiO_2 coatings on substrate. The infuluence of plasma spray process on the mixture of phases of coatings (corundun type Ti_2O_3, monoclinic Ti_3O_5, triclinic magneli phases, and tetragonal rutile) and the relation between deoxidation and the electrical conductivity of plasma sprayed coatings have been studied. The amount of oxygen loss in the plasma sprayed TiO_2 coatings is infuluenced greatly by auxiliary hydrogen gas. Accordingly, the electrical conductivity of plasma sprayed TiO_2 coatings increases with the increase of oxygen loss. The reduction amount of plasma sprayed TiO_2 coatings increases with a drop of atmosphere pressure and an increase in quantity of hydrogen. The formation amounts of Ti_3O_5 and Ti_2O_3 phases increasesd with the deoxidation of plasma sprayed TiO_2 coatings.
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