Study On Microstructure And Properties Of Magnesium Oxide And Magnesium Oxide Reinforced Zirconia/Tricalcium Phosphate Composites

MgO and is important components of the new composite materials.The specific structure of MgO and sodium carbonate have been widely used in the field of architecture.For the study of the structure and properties of this kind of inorganic compounds,nano particle preparation is the breakthrough point to improve performance and make contributions to the development of new composite materials.The study uses a variety of properties of the surfactant and solvent,and the specific structure nanoparticles also have a lot of shape.(1)in the preparation of the specific structure of MgO,MgO uses a source of magnesium powder,surfactant using polyvinylpyrrolidone,sixteen alkyl three methyl bromide,poly propylene glycol and ethylene oxide addition polymer P123,poly propylene glycol and ethylene oxide addition polymer,P127 polyethylene glycol,oil amine solvent,using two acetone alcohol,oleic acid,water,obtained a variety of MgO nanoparticles structure,including spherical structure,linear structure,porous structure,square structure,pipe shaped structure etc..Solvent,surfactant and temperature have important influence on the crystal structure of MgO nanoparticles.(2)surfactant when using oil amine synthesis,solvent selection of oleic acid nanoparticles obtained by MgO,the samples of the highest specific surface area;surface active agent using epoxy ethane addition polymer P123 or ethylene oxide addition polymer solvent P127,oleic acid,MgO also prepared nanoparticles a larger surface area;without the addition of surfactant,solvent selection of oleic acid,the specific surface area is relatively low.(3)the MgO content increase with the increase of sintering temperature,leading to improved mechanical properties.With 10% adultered MgO content,ZrO2 composite diaplays optimum mechanical properties.Vickers hardness reaches 6400 Mpa,breaking strength reaches 26 Mpa.(4)such performance is contributed by filled pores in the material by formed square ZrO2 phase and the liquid phase.At the same time,the presence of MgO suppresses the allotropic transformation of ZrO2.