The Synthesis And Properties Of The Nano-ceramic Pigment Based On ABO₃ Of Perovskite

Nano-ceramic pigment has a wide application prospect in many fields due to its high chemical stability and thermal stability.Nowadays,the influence of architectural pigments on environment and energy is increasingly serious.Based on this,this paper aims to obtain the green and low-energy synthesis technology,and obtain the small size and dispersive nano-ceramic pigment in relatively mild environment.In this paper,a series of nano-ceramic pigments were prepared by using the self-propagating combustion method in the preparation process,and the product was systematically characterized,and the color performance and photocatalytic performance of the pigment were studied.The main research contents and conclusions are as follows:（1）NiTiO₃ and Ni_1-xEu_xTiO₃ nano-ceramic pigments were prepared by using low-energy synthesis technology-self-propagation combustion method.The products were characterized by XRD,SEM,EDS,uv-vis and CIEL*a*b*and so on.the properties, morphology,composition and color properties of the products were analyzed.The results showed that:800 was the better temperature for producing pigment NiTiO₃,and the dispersity of pigment was good and uniform.Meanwhile,the effects of different dosage on the composition,morphology,composition and color properties of Ni_1-xEu_xTiO₃ pigment were analyzed.The results show that a solid solution of single phase can be obtained when x<0.2.The results of color analysis show that when the rare earth ion content x is 0.15,the chromaticity is better.The optimal path of synthesis was optimized by adjusting the pH value of the solution and different preparation methods.The results show that the Ni_1-XEu_xTiO₃@TiO₂ nano composite microspheres with honogeneous size in the 40-60 nm range can be synthesized by using the sol gel method,using P₁₂₃23 as the template agent and butyl titanate as Ti source,and when the solution pH is 8.Through SEM and TEM,the active oxide TiO₂ can be clearly seen on the microsphere surface,while the matrixNi_1-XEu_xTiO₃ is inside the shell.At the same time,the photocatalytic activity of the modified methyl orange was studied.The results showed that the photocatalytic activity of the modified products was greatly improved,specially the photocatalytic activity of the composite microspheres coated with TiO₂ was best,and its value reached 58.6%.（2）A series of LaFe_1-xEu_xO₃ nano-ceramic pigments were synthesized using self-propagating combustion method.The product was characterized and analyzed.The results showed that when the calcination temperature was 750℃and the amount of x=0.15was added,the pigment had good chromaticity.SEM showed that the doped products have good dispersibility.The sol-gel method and precipitated precipitation method were used to compound the active oxide TiO₂ andLaFe_1-xEu_xO₃,and the composite pigment with the core of LaFe_1-x-x Eu_xO₃ was prepared.The results of SEM and TEM showed that the compound products prepared by sol-gel method were uniformly distributed in the composite microspheres of 40nm to 60nm,and the composite products prepared by precipitation precipitation method were flower-shaped.At the same time,the photocatalytic performance of the products were also analyzed.The photocatalytic performance of the products could be greatly improved by the two metnods,especially the higherphotocatalytic properties of the flower clusters,from 30.2%to 90.7%,which was related to the large specific surface area of the product.（3）The rare earth element Eu and transition metal element Co were used to synthesized Y₂Ce_2-xR_xO₇ nano ceramic pigment.Through XRD analysis,we studied the structure characteristics of different doped ions and Y₂Ce_1.9Eu_0.1O₇ at different temperatures.The chromogenic properties of two series was analyzed.The products of different calcination temperature were characterized by XRD and the influence of temperature on the crystal structure was analyzed.The roasting was analyzed,and the grain growth activation energy was 29.27kJ·mol-1.