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简介：Viscosityofsoda-lime-silicateglassdopedwithrareearthoxides(Pr6O11,Eu2O3,Yb2O3)wasinvestigatedbytherotatingcrucibleviscometer,themeltingtemperatureandactivationenergyforviscousflowofthestudiedmeltwerederivedonthebasisoftheArrheniusEquation,thecoefficientofthermalexpansion,glasstransitiontemperatureanddilatometricsofteningtemperaturewerealsodeterminedwithdilatometry,inordertorevealtheeffectsofrareearthelementsonthebehaviorofsoda-lime-silicateglass.Theresultsshowedthatintroductionofrareearthoxidesdecreasedtheviscosityofsoda-lime-silicateglassandmeltingtemperatureofcorrespondingmelt,increasedcoefficientofthermalexpansionofsoda-lime-silicateglass.Theglasstransitiontemperature,dilatometricsofteningtemperature,andmeltingtemperatureofsoda-lime-silicateglassdopedwithrareearthoxidesincreasedwithincreasingcationicfieldstrengthofcorrespondingrareearthions.

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简介：InordertosensitizetheluminescenceofEu3+ionsinheavymetalglass,zincleadborateglasssamplescontainingvariousconcentrationsofEu3+andTb3+ionswerepreparedtostudytheTb3+toEu3+non-radiativeenergytransferphenomena.EnergylevelstructuresofTb3+andEu3+ionswereplottedtoshowtheexcitationandenergytransferroutes.EfficientenergytransferfromTb3+toEu3+wasobservedandstudiedqualitativelyintermsofdopingconcentrations.Thesensitizationturnedouttobelesseffectivethanexpected.FurtherstudiestocharacterizetheoxidationofTb3+intotetravalentstateandtoexaminethemechanismofenergytransferareproposed.

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简介：Er/Ybco-dopedborate-silicateglasseswithvariousYbconcentrationswerefabricatedbyhigh-temperaturesolid-reactionmethod.Thephotoluminescencespectraaround1.55μmandthevisibleupconversionspectraweremeasured.TheradiativelifetimeofEr-4I13/2,com-paredwiththemeasuredone,wasobtainedbyJudd-Ofelttheorybasedontheabsorptionspectra.ArateequationmodelforEr/Ybco-dopedsystemhasbeenestablishedbasedonthedataobtainedfromthemeasurements,includingtheabsorptionandemissio...

简介：(Cu60Zr30Ti10)98Y2bulkmetallicglass(Φ4mm×70mm)wasobtainedsuccessfullybycoppermouldcoolingandspraying-casting,andsomesampleswereisothermallyannealedattemperaturesof473and623K,whichwaslowerthantheglasstransitiontemperature(Tg)for1h.Microstructureandpropertiesofas-castandannealedsampleswerestudied.Crystallizationphases(Cu10Zr7andCuZr)wereobservedinannealedsamples,andthespeciesandfractionofthesephasesincreasedwithincreasingannealingtemperature.Mic...