Method for improving biological activity of titanium nitride ceramic coating by ozone treatment

The invention discloses a method for improving the biological activity of a titanium nitride ceramic coating by ozone treatment. The method comprises the following steps: loading a sample with the titanium nitride ceramic coating into an inorganic tube; heating the inorganic tube till the temperature is 30-150 DEG C; charging ozone, wherein the concentration of the ozone is 10-30 mg/L, the working pressure intensity is 0.1 MPa, and the gas supply time is 0.5-6 hours; after reaction is completed, taking the sample out, and storing the sample in a sealed utensil made of an inorganic material. The method has the advantages that the surface of the titanium nitride ceramic coating is decontaminated and oxidized by utilizing the ozone, and the color, the microstructure, the hardness and the wear resistance of the titanium nitride ceramic coating are kept; meanwhile, the wetting performance of the surface of the titanium nitride ceramic coating is further obviously improved, so that interaction between cells and implant materials is improved, and bone cells can be more quickly attached, spread, proliferated and differentiated on the surface of an implant body. Therefore, the biocompatibility and the biological activity of the titanium nitride ceramic coating can be improved by virtue of an ozone treatment method provided by the invention.