Study Of Composite Oxide-Titanium Electrode Coated By Laser-Assisted Heating

For the excellent properties including stable size,strong corrosion resistance and high energy utilization rate,the coated Ti anodes has been widely used in many spheres such as chlor-alkali industry and organic pollutant treatment.The rapid development of industry has proposed more requests to electrode material.With the purpose of promoting the production efficiency of the coated Ti anodes,the technology of laser assisted heating was employed to manufacture the coated Ti anodes.It has been proved that the manufacturing technology with laser assisted heating can shorten the preparation time of the electrode,and pronounce the performance of the coated Ti anodes obviously.In this paper,the coated Ti anodess of IrO₂-Ta₂O₅-SnO₂/Ti and SnO₂-Sb/Ti composite oxides were prepared by laser.The effects of laser linear energy densities,the thicknesses of oxide coating and oxide compositions on the oxide coating morphology,electrochemical properties and the servicing life have been discussed.The conclusion drawn from the discussion can be stated as:1.The linear energy density of laser had an obvious effect on the composition of the coating by affecting the temperature during the preparation process.The distribution of cracks on the surface of the sample can be affected by the energy linear density of laser.With the increase of linear energy density,the electrocatalytic activity of the electrode first increases and then decreases.The change of the impedance value of the electrode is firstly reduced,and then the impedance can be enhanced by higher linear energy density of laser.2.An appropriate thickness of the oxide coating can increase the relative crack area of the sample surface.The relative crack can be increased by 1.5 times.As a result,the actual surface area of the electrode can be promoted,and ensure that there is more active material on the surface of the sample.3.The width and depth of crack distributed on the coating can be suppressed by SnO₂.The performance of the electrode can be increased by 3.5 times when the content of Sb is at a certain value;Sb can bring a uniform distribution of oxide components on the surface of the electrode,but the width of the crack will be increased by Sb at the same time.The electrocatalytic performance of the electrode can be improved and the impedance of the electrode can be decreased by Sb with certain content.4.A conclusion can be drawn based on the life test that the oxide coating will separate from the matrix,and the separation can get more and more severe as the test progresses,57.8%of the oxide coating have separated from the matrix during the whole process of the life test.The electrochemical activity of the electrode can also be reduced after a long-time service.The analysis shows that the content of Ti and O elements on the surface of the sample increases after the life test.