Rutile Titanium Nickel Yellow Pigment Preparation And Performance

In this paper, titanium-nickel yellow pigments were prepared by homogenous precipitation method and Sol-Gel method. On the basis of homogenous precipitation method, composite titanium-nickel yellow pigments were prepared by doping different mineralizers. Additionally, titanium-nickel yellow pigments and composite titanium-nickel yellow pigments were charactered by using XRD, thermal analysis technology, FT-IR,SEM,TEM and particle size distribution measurements.For the titanium-nickel yellow pigments prepared by homogenous precipitation method, the effect of the species of precipitator, the concentration of carbamide, the species and dosage of the dispersant, reaction time and temperature, raw material raio, calcinations temperature on the crystal morphology, particle size and distribution were discussed. Furthermore, the preparation conditions of pH value, molar ratios of HAc to Ti(OBu)₄, of alcohol to Ti(OBu)₄, of water to Ti(OBu)₄, reaction temperature and time , dispersant and calcination temperature were studied by Sol-Gel method. For these two methods, the coloring properties of titanium-nickel yellow pigments were discussed. The results show that titanium-nickel yellow pigments with bright color, uniform distribution and the average size of 40nm were obtained by homogenous precipitation method. And the dispersion of titanium-nickel yellow pigments can be improved by adding dispersant OP-10. Although the calcination temperature of titanium-nickel yellow pigments prepared by Sol-Gel method was lower than the one of homogenous precipitation method, titanium-nickel yellow pigments with poor dispersion can only be obtained. Dispersion of titanium-nickel yellow pigments was improved by adding dispersants. Compared to Sol-Gel method, titanium-nickel yellow pigments prepared by homogenous precipitation method have better dispersion and color performance. These two methods have better thermal stability and no obvious change of infrared absorption.Titanium-nickel yellow pigments were modified by doping diffrerent mineralizers, including single mineralizers and compound mineralizers. In single mineralizers, titanium-nickel yellow pigments were modified by doping ZnO, H₃BO₃, NaF, CaF₂. The effect and mechanism of different mineralizers and the same mineralizers with different dosage on the crystal structure, thermal stability, color performance and infrared absorption of titanium-nickel yellow pigments were investigated. In compound mineralizers, titanium-nickel yellow pigment was modified by doping H₃BO₃+NH₄Cl. The effect and mechanism of H₃BO₃+NH₄Cl with different concentrations on the crystal structure, thermal stability, color performance and infrared absorption of titanium-nickel yellow pigments were investigated. The researches show that composite titanium-nickel yellow pigments have a rutile crystal structure and better thermal stability. And the titanium-nickel yellow pigments with different hue were prepared by doping different mineralizers. The pigment color can be changed from dark yellow to light yellow. Moreover, with the doping dosage increasing, the color performance changes under the condition of doping same mineralizers.