Control Synthesis And Performance Reserach Of Doped Nanometer Infrared Reflective Paint

Nanometer infrared reflective paint is one of the hotspot in research of materials.Developing more reflective color pigment is a trend,which is no toxic elements such as Hg ? Cd ? Sb ? As ? Cr and nice thermal stabilitily and chemical stabilitily environmental protection infrared reflective paint.In this paper,CoAl₂O₄ and NiTiO₃ are our research sample.The synthesis technology with low energy consumption is used to produce doped nanometer infrared reflective paint.The main research content is as follows.?1?The simple and controllable synthetic technology of low energy consumption---Self-propagating combustion,is used to produce CoAl₂O₄ and CoAl2-x ZxO₄?Z=La?Nd ? Sm ? Eu?doped nanometer infrared reflective paint.The X-ray diffraction?XRD?,scanning electron microscopy?SEM?,energy spectrometer?EDS?,ultraviolet,visible infrared spectrophotometer?UV-NIS-NIR?and chromaticity instrument analysis instrument is used to analysis the effect of different doping amount,doping elements,high temperature calcination temperature on the powder color,morphology,properties,crystallinity,structure and the influence of ultraviolet visible infrared emission performance.And next,we begin the wall simulation experiments to test the insulation performance.As a results,the best temperature of generating CoAl₂O₄ is 800 ?,the L value?lightness value of CoAl₂O₄ increase gradually,the color is more bright with the increase of calcination temperature.When x is 0.05?0.1?0.15,La can dope between CoAl2-x LaxO₄?x=0.05,0.1,0.15,0.2,0.3?.Impurity peak appears,it is LaAlO₃,When x is ?0.2.CoAl1.9Eu0.1O₄ and CoAl1.8Eu0.2O₄ have the same largest infrared reflectivity,it is 90%.CoAl1.9Eu0.05O₄ is used as wall paint,the best experimental results is obtain when the coating quality concentration is 2.5%.And temperature difference value is 10 ? between the indoor and outdoor.It is 5 ? lower,when it is not bloted out.?2?NiTiO₃ and Ni_1-xZ_xTiO₃ as nanometer infrared reflective paint is produced by self-propagating combustion method,which Z is Y?La? Sm?Eu;x is 0.05?0.1?0.15?0.2?0.3.We study the influence of different calcination temperature on the structure of the product and chromaticity,and analyz the calcining process dynamics behavior of self-propagating combustion synthesis NiTiO₃.The results show that the synthetic pigments are dispersion good spherical particles,uniform distribution of granularity.we study the crystal growth dynamics behavior of NiTiO₃ by the selfpropagating combustion and calculate the energy gap value of the product.The results show that the single phase solid solution can be obtained,when the doping amount is < 20% by the study of doped series pigments.SEM results show that the doped series product are well dispersed good crystal,the grain size is 40⁶0nm.EDS analysis results show that the synthesis has no chemical segregation phenomenon,and conform to the stoichiometric ratio.When the replace value of Rare earth ions is 0.05,the chromaticity is best through the analysis of the shade of the product.when the Eu³⁺ replace Ni²⁺,the NIR reflectance is highest,it is 89.0%.