Synthesis And Characterization Of Porous Thermal Insulation Materials&Nano-magnetic Materials

In this paper, we study mainly two kinds of Inorganic functionalnano-materials. Firstly, is about the research of nano porous thermalinsulation materials. The first chapter introduces progress of porousinsulation materials and nano porous insulation materials, theirdevelopment status, thermal insulation mechanism, characteristics andclassification of nano porous material. Also, we discuss the feasibilityin theory, explains the necessity of this study. The third chapter is thedetailed explanation of the micro and macroporous structure of ZSM-5hierarchical porous materials. The synthesis, characterization, analysisof results and discussion is displayed in this part.We use hydrothermal synthesis method firstly synthesize the standardmicrometer sized ZSM-5, then using HF corrosion, KOH corrosion,electrochemical corrosion (cation electroplating) three corrosionmethods, corrodes macroporous structure on the surface of ZSM-5crystal.in this three way, we realize hierarchical porous preparation, I designseries of experiments according to principle of variables controlling.Factors that affect corrosion pore size, pore distribution and thermalinsulation performance were discussed herein. Samples of hierarchicalporous ZSM-5were prepared respectively under different HF corrosionconcentration, different alkali concentration and electrode voltage.These ZSM-5samples were analyzed by X-ray diffraction, SEM scanningelectron microscope, BET specific surface area and porosity distribution,N2adsorption characterization test, visual display of the poredistribution of materials, pore size and morphology characteristic. In the discussion of the results, first we discuss the preparation ofhierarchical porous nano ZSM-5, the relationship between the basicproperties and insulation properties, analysis of the important factorthat influences the thermal insulation performance. At last, we furthercompared the insulation performance of nanoporous materials of differenttypes, including TS-1, MCM-41etc.In this paper, another functional materials we studied is applied inthe field of information technology, especially being used widely as themagnetic storage media-the six angular crystal nano ferrite magneticmaterial. The second chapter introduced the development and presentdeveloping situation of nanometer magnetic materials and nanocrystallineferrite magnetic material. The magnetic mechanism of nanometer ferritemagnetic materials and parameters to measure the magnetic performance aredescribed. The third chapter is focused on experiment andcharacterization. Herein mainly use two kinds of preparation methods,chemical co-precipitation and microemulsion preparation of nanometerbarium ferrite crystal. By controlling the reaction time, theconcentration ratio, different calcination temperature, we explore thebest reacting condition.Characterization methods being used include magnetic test (PMMS),X-ray emission spectroscopy, scanning electron microscopy, SEM. From theSEM and XRD spectrum, we can apparently see our nano barium ferriteprepared are uniform in size and shape distributed in the optimum sizerange of100-200nm, which pretty good correspond with hysteresis curvesand XPS valence testing as well. In terms of experimental method, weovercome the physical traditional preparation method, which need themalpractice of very high calcination temperature. We successfullyprepared BaFe12O19pure crystals at a comparative lower calcinationtemperature of800°C.The nano magnetic particles are quite uniform and perform monodisperse properties. Plus, by controlling the size and shape,we can control their magnetic properties such as coercivity, they can beadjusted from hundreds of Oes to thousands of Oes.