Study On Preparation And Properties For Hybrid Ceramics Base Of High Temperature Phase Change Heat Storage Materials

Recently, people has paid much attention to energy and environment problems.Storage heat and heat can be recycled to become one of the methods to solve theseproblems. In order to save energy, protect environment and increase recyclingindustrial waste heat, we need to do further study about thermal energy storagetechnology and promote the use of thermal storage materials. Hybrid ceramics base ofhigh temperature phase change heat storage materials not only has high temperatureresistance, corrosion resistance and thermal stability of ceramic, also compositeexcellent heat storage performance of phase change material. As a result, study a newkind of storage material has great application prospect in shortage of resources days.In this paper, we use aluminum powders as phase change material, white mud andhigh bauxite hybrid ceramic powders as substrate material prepare good performanceof hybrid ceramics base of high temperature phase change heat storage materials. Theexperimental method is mix sintering. It's explained the selection of raw materials andmolding samples performance characterization method. Introduce the preparationprocess, bases on the density and intensity experiment to determine the relevantprocess parameters, such as the molding pressure and holding time, sinteringtemperature and holding time. Analyses the experimental parameters influence on theinternal structure, mechanical properties and thermal stability of the sampleperformance. Analysis the sintering process and the sintering mechanism of specimen. Use metallographic microscope, SEM and EDS observation sample macroscopictissue and microscopic details of defects, XRD analysis the components of samplebefore and after the high temperature sintering chemical reaction, TG-DSC test samplethermal physical properties. Finally, we compared the molding samples and packagingsamples by thermal cycle tests.The results show that when the content of aluminum powder is70%, white mud is5%, high bauxite is25%, use mixed sintering method can produce hybrid ceramicsbase of high temperature phase change heat storage materials with fine thermalphysical properties and thermal stability. The sample has good formability and easysintering, organizational structure is uniform. Phase change latent heat is132J/g, DSCcurves appeared two obvious endothermic peak on580.7?and636.8?. Materialheat storage density is376.8J/g. After30times thermal cycle experiment, specimenweightlessness rate within1%. The phase composition and phase transitiontemperature basically remain and phase change latent heat for about3.56%decline.That mains hybrid ceramic phase change heat storage material is thermal stability.Encapsulation experiment is optimize for material of heat capacity and thermalstability. After50times repeatedly heating and cooling, encapsulation materials has nocracks, deformation and phenomenon of aluminized. And sample has complete instructure.