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1、·AbstractWiththeimprovementoftheaestheticsrequirementofteeth,peopleareconstantlylookingforthedentalrestorativematerialswhicharesimilartonaturalteeth.All-ceramicmaterialsbecomemoreandmorepopularfortheirexcellentproperties,suchasgoodtranslucent,goodbiocompatibility,s
2、tablechemicalpropertiesandabrsionresistanceetc.Butceramicmaterialshavedefect,namely,itsinherentbrittleness,whichleadstohighfractureriskandshortservicelife.Asaresult,peoplehavebeencommittedtotheresearchoftheall-ceramicmaterials.Thestrongtoughnessofall-ceramicisimpro
3、vebychangingthemethodofporcelainmaterialstructureandprocessingtechnology,sothatitcanbebettermeettherequirementsofthefunctionoftheoralcavity.Inthispaper,the3Y-TZPall-ceramicmaterialswerepreparedbymicrowavesinteringandglassinfiltrationtechnique.Theeffectsofmicrowaves
4、interingprocess,glassinfiltrationprocessonthemicrostructureandpropertiesof3Y-TZPall-ceramicmaterialswerestudied,thesuitableprocessparametersofimprovingthestrengthandtoughnessof3Y-TZPall-ceramicmaterialswereworkedout,whichcanbebetterforclinicalapplication.Theresults
5、showthat,(1)Adding5wt%ammoniumbicarbonateaspore-formingagent,thematrixporosityandporesizeismoresuitableformoltenglassinfiltration.(2)Inacertaintimeofheatpreservation(30min)conditions,withtheincreasingofmicrowavesinteringtemperature,themicrohardness,fracturetoughnes
6、s,flexuralstrengthofthesampleswith5wt%pore-formingagentareall
firstincreasedandthendecreased.At1200℃themechanicalperformancereaches
thebest,whichthemicrohardness,fracturetoughnessandbendingstrengthare10.49
GPa、8.52MPa·m1/2、336.74MPa,respectively.(3)Inacertainmicrow
7、avesintering
temperature(1200℃)conditions,withtheincreasingofmicrowavesinteringholding
time,themicrohardness,fracturetoughness,flexuralstrengthofthesamplesareall
firstincreasedandthendecreased.(4)Thestructureandpropertiesofthesamplesare
improvedaftermoltenglassinfi
8、ltration,andtheorganizationandmechanicalofthe
samplesaftermoltenglassinfiltrationat1300℃for6hreachesthebest,thatthe
microhardness,fracturetoughne
