简介：Throughmeasuringthecoefficientoflinearexpansion,thestructureandpropertiesoftheLi2O-Al2O3-SiO2lowexpansionglassceramicscontainingB2O3arestudiedbyJRandXRD.ItisshoutnthattheIRmethodisefficientinthestudyoftheglass-ceramicsstructure.Thereisa"Boronabnormality"inthesystemwhichhasanimportantinfluenceonthepropertiesoftheglass-ceramics.

简介：TheelectronicstructuresofCuS2,CuSe2andCuTe2withpyritestructures,withintheframeworkthedensity-functionaltheoryhavebeeninvestigated.ThecalculatedresultsexplainedtherecentexperimentalresultswhichshowthatthereisnoclearindicationofstrongelectroncorrelationsintheelectronicpropertiesofCupyrites,duetothedominantchalcogenpcharacterratherthandcharacteristicofCuattheFermilevel.

简介：TheantibacterialeffectofcarryingsilverB2O3-SiO2-Na2Oglassmaterialwasstudiedbymeansofantibacterialring,nephelometery,MICvalue,thinfilmattachmentandmicrocalorimetry,respectively.TheexperimentalresultsoffivekindsofantibacterialtestmethodsarealmostidenticalandcanverifythatcarryingsilverB2O3-SiO2-Na2Oglassmaterialexertsanexcellentantibacterialperformance.Antibacterialringandnephelometeryaresimple,quick,buttheprecisionisrestrictive.MICvalue,thinfilmattachmentmethodandmicrocalorimetrycanquantitativelycomparetheantibacterialeffectsoftheantibacterialglassmaterial.Comparedwiththetraditionalmicrobetestmethods,themicrocalorimetrycananalyzetheinhibitingeffectofthecell'sgrowthandmetabolismontheantibacterialglassmaterialbymonitoringthethermaleffectcontinuouslyandautomatically.

简介：TiB2ceramicspowderwassynthesizedfromB2O3-TiO2-Mgsystem.TheeffectsofTiB2additionasdiluentonthecombustionsynthesisprocesswereinvestigated.TheresultsofthermodynamiccalculationandexperimentsshowthattheincreaseofTiB2contentrangingfrom0to20wt%canreducetheadiabatictemperatureTadfrom3100Kto2896KandcombustiontemperatureTcfrom2139Kto1621Krespectively.TheparticlesizeandhalfwidthoftheparticledistributionarealsoincreasedwiththeadditionofTiB2increasingfrom0to20wt%.ThecombustionproductisamixtureofTiB2,MgO,andotherintermediatephases.TheleachedproductcontainsmainlyTiB2,TiO2andTiN,anditsoxygencontentis7.77wt%.

简介：Aneffectivedispersion-strengtheningphaseinAl-8Fe-2Mo-2Zr-2Nd-0.7Ti-1.6SialloywasidentifiedtobeanagedprecipitatephasewithpossiblechemicalstoichiometryofAl20（Ti,Mo）2Ndandfcccrystalstructurewithao=1.455nm.ThestructurewasdeterminedtobeFm3mspacegroup.

简介：Theimplantedionrange,thedepthprofileandthefilmsttuctureoftheimplantedlayerwerestudied;thecarrierconcentrationandthemobilityweremeasured;theconductivitymechanismofthefilmimplantedFeintoAl2O3ceramicwasdiscussed.TheconclusionisthattheimplantedFe2+ionsmoveintoAl2O3latticeandreplaceAl3+toformsubs-titutionimpuritiessothattheionimplantedlat-tice,ascomparedwiththeoriginalone,presentsaneffectivenegativechargewhichformsanegativechargecenter.Avacancyisboundarroundit,andanacceptorisintroducedintheforbiddenband.

简介：与更大的秒顺序非线性发现材料，有GeS_2的各种各样的比率的Ge-P-Schalcogenide眼镜:P_2S_5被melt-准备--熄灭方法。这些眼镜的微观结构和光学性质被XRD描绘，拉曼，Vis-NIR光谱学并且。制造者穗技术。第二泛音代(SHG)在被归功于到热应力坡度，and/或微各向异性的缺点的同样准备的锕系元素硫族元素化合物眼镜里被观察(例如孤独对轨道或原子价选择对)比较喜欢--同样准备的眼镜的取向。

简介：Sodiumparanitrophenolatedihydrate(NPNa·2H2O)isanexcellentsemiorganicnonlinearoptical(NLO)material,crystallizesbothinwaterandmethanolwithhighdegreeoftransparency.Goodopticalqualitysinglecrystalsofdimensionupto18mmx6mmx3mmareobtainedbyisothermalsolventevaporationtechnique.Thesolubilityofthecrystalindifferentsolventswasmeasuredgravimetrically.ThesinglecrystalsofNPNa·2H2Oshowvariationinphysicalpropertiesandgrowthrateindifferentsolvents.Methanolorethanolsolutionyieldscrystalsofbipyramidalshapewithclearmorphology.However,methanolgrowncrystalisexhibitingimprovedhardnessparametersandpossessesexcellentthermalstabilityascomparedtowatergrowncrystals.TheeffectsofsolventonhardnessparameteralongwiththermalandopticalpropertiesofNPNa·2H2Owasrevealedinthispaper.

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简介：TheRamanspectraof3%(molefraction)Y2O3-ZrO2(3Y)areobtainedatdifferenttemperaturefrom77Kto853K.Theresultsshowthat260cm-1Egand460cm-1Egmodesonthespectrashifttowardlowerwavenumberwiththeincreaseoftemperature;meanwhile,thecontinuityoftheHalfWidthatHalfMaximum(HWHM)andwavenumber(frequency)ofRamanbandsarebrokenandt-phaseonlypartiallytransformstom-phaseat523K.Basedontheexperimentalresults,thispaperdiscussesthet-phaselatticevibrationof3YandpresentstheimagesofvibrationdisplacementofsixRaman-activemodesfort-phaseofZrO2.TheanalysisindicatesthattherearediversitiesexistinginthedisplacementoftheatomicvibrationofRaman-activemodesbecauseoftheirdifferentsymmetriesatvarioustemperature,whichleadstothedifferentchangetendenciesofRamanbands.Furthermore,theabruptchangesofsomeRaman-activemodesindicatingtheatomicdisplacementareassumedtobethecondensationsofphononmodesinthet→mphasetransition.

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简介：以TiCl_4的乙醇溶液作为前驱体,采用溶胶-凝胶法制备TiO_2溶胶,用浸渍-提拉法在载玻片表面制成了具有抗菌作用的TiO_2薄膜以及铁掺杂TiO_2薄膜,考察了原菌液浓度、镀膜次数以及铁掺杂量对薄膜对大肠杆菌的抗菌性能的影响。

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简介：采用超声机械法制备纳米Al2O3、SiO2、MgO等颗粒，并对其进行化学修饰，使其稳定地分散在基础油中，获得自修复纳米润滑添加剂。通过四球试验与止推圈试验考察摩擦学性能。试验结果表明：自修复纳米润滑添加剂具有良好的分散稳定性、抗磨减摩性和自修复性。

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简介：TiO2nanometerthinfilmswithphotocatalyticantibacterialactivitywerepreparedbythesol-gelmethodonfusedquartzandsodalimeglassprecoatedwithaSiO2layer.ThethinfilmswerecharacterizedbyX-rayphotoelectronspectroscopy(XPS),scanningelectronmicroscopy(SEM),andX-raydiffraction(XRD).TheresultsshowthatsodiumandcalciumdiffusionintonascentTiO2filmiseffectivelyretardedbytheSiO2layerpre-coatedonthesodalimeglass.Theantibacterialactivityofthefilmswasdetermined.ThecrystallineofTiO2nano-meterthinfilmhasimportanteffectsontheantibacterialactivityofthefilm.

简介：Thesynthesisofultrafineceriumdioxideprecursorviahomogeneousprecipitationwasstudied.Mixedaqueoussolutionofanhydrousceriumnitrateandureawasfirstheatedto85℃for2h,andthepreparedsuspensionwasthenagedatroomtemperatureforvariousperiodsoftime.Whiteprecipitatewasfinallycollectedbycentrifugingandwashedwithdistilledwaterandanhydrousethanol.Theobtainedceriumdioxide(CeO2)precursorwasobservedwithSEM.Itwasfoundthatthemorphologyandsizeoftheprecursorwerestronglyaffectedbyagingtimeandstirringconditions(withorwithoutstirring).Theprecipitatedfinesphericalparticlesoftheprecursorchangedtheirshapefromellipsetosliceordirectlytoslice.Finesphericalmonodispersed(300nm)precursorpowderscouldbeobtainedbycontrollingtheagingtime.Stirringthesolutionalsocouldchangethereactionprocessandthusthemorphologyandsizeoftheprecursorwerechanged.

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简介：Thevolatilizationkineticsofantimonytrisulfideinsteamatmospherewasstudiedwiththermogravimetryattemperaturesfrom923to1123K.Atheoreticalmodelwasdevelopedtocalculatetheoverallrateconstantandthemasstransfercoefficientingasphases.Theexperimentalresultsshowthatthevolatilizationrateisenhancedwithincreasingtemperatureandsteamflowrate.Thevolatilizationrateismainlycontrolledbythemasstransportingasphases.Theapparentactivationenergyfortheprocessisfoundtobe59.93kJ/mol.ItisdemonstratedthatSb2S3isdominantlyoxidizedintoSb2O3andH2Sbywatervaporinthevolatilizationprocess.Someantimonymetalisformed.Thereactionmechanismisdiscussedinaccordancewithexperimentaldata.