Control Conditions of Titanium Dioxide Coating Treatment
The first is the purity of additives, should not make the finished product by the pollution of hazardous impurities, for organic treatment agents should also consider the colour itself. If the colour is dark or after baking will become dark material can not be used. In addition, reagents should be used in solution as far as possible in order to remove any solid mechanical impurities.
In order to achieve a homogeneous coating without any leakage, the operating conditions need to be controlled: the concentration of the reagents, the adjustment of the pH value, the order of adding the treatment and neutralising agents, the speed of addition and the temperature of the reaction, etc. The dispersion of the slurry also has a great influence. Generally speaking, choosing the right pH value and reaction temperature, a thinner reagent concentration and a slower reaction speed will result in a relatively more homogeneous film, so before determining the post-treatment process, tests should be carried out on a variety of different properties of titanium dioxide to find the best treatment conditions. The uniformity and goodness of the surface coating can be observed by means of a point microscope with magnification and video.
The product after coating is then filtered, washed, dried and air crushed to obtain the final product.
