陶瓷材料制备1.pdf

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1、Chapter6:Ceramicsynthesisandprocessing96.1Introduction96.2Solidstatereactionsforceramicsynthesis96.3Wet-chemicalroutestoceramics(spray/co-precipitation/complexation/sol-gelprocess)96.4StöberprocessandOstwaldripening96.5Pechinimethod96.6Glycine-nitratepyrolysis(GNP

2、)method96.7Otherwet-chemicalmethodsCeramicProcessingandMicrostructuresLouisWinnubst’sLecturenotes1.Introduction.Theprocess(microstructure,homogeneity)2.Characteristicsofpowders.Definitions;particlesize3.Interactionbetweenpowderparticles.DLVOtheory;suspensionstabil

3、ity4.Preparationofpowdersandcoatings.Solidstatereactions;nucleation–crystalgrowth5.Treatmentsofpowders.Milling,mixing,granulation6.Compactionprocessing.Pressing,extrusion,etc7.Thermalprocessing.Drying,binderburn-out8.Sintering.Solidstatesintering;liquidphasesinter

4、ing6.1Introduction6.1IntroductionCeramicMaterialsCeramicMaterialsAlonghistoryandagreatfutureAlonghistoryandagreatfutureUniversiteitTwenteCeramicsCeramics•Ceramicsareinorganic(non-metallic)materials,whichareabletowithstandelevatedtemperatures(inexcessof500ºC)•Theya

5、reavailabeasbulkorascoatingsoraspowders.•Forbulkceramics(inmostcasesalsoforcoatings)apowderisbroughtintoaformandsubsequentlyahightemperaturetreatmentisgiven(

6、Electronics•Tiles•Medical•Sanitary•Cuttingtools•Engineparts•Naturalmaterials•Chemicalprocesses•Largeamounts•Specificproperties•Lowcosts•NotalwaysvisibleIntroductionPropertiesofadvancedceramicsPropertiesofadvancedceramicsStructuralStructuralFunctionalFunctional••Ha

7、rdHard•(di)Electrical••WearresistantWearresistant•Magnetic••NonNon--corrosivecorrosive•Optical••ThermalstableThermalstable•Filter/Membrane•BiologicalTranslucentAluminatube:IntroductionRelationshipsinCeramicProcessingRelationshipsinCeramicProcessingFabrication;Prod

8、uct;ProcessProperties•ChemicalComposition•CrystalStructureMicrostructureCanyougive•ParticleSize/Morphologyexamplesof•GrainSizemicrostructure•Homogeneity