简介：TheincompactlongafterglowpigmentSrAl2O4:Eu,Dywassynthesizedbyceramicstechnology.TheagglomeratedstartingrawmaterialhadlittleeffectonthesynthesisofSrA12O4matrixthroughsolid-statereactionmethod,buttheshrinkageanddensificationwasretardedgreatlybytheagglomeratedpowderbytheformationoflargeandextensiveporenetwork.Thesinteringmechanismissurfacediffusion(withoutfluxB2O3)andgrainboundarydiffusion(withB2O3asflux)respectively,andtheas-preparedlongafterglowpigmentglowsinthedarkforover4000min.

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简介：Theheattransferoil-basedmagnetorheologicalfluid（MRF）waspreparedusingoleicacid-modifiedmicroncarbonylironpowderasamagneticdispersedphaseandstrontiumhexaferrite(SrFe12O19)nanoparticlesasanadditive.ThesedimentationstabilityofMRFswasstudied.TheresultsindicatedthatthestabilityofMRFswasimprovedremarkablybyaddingSrFe12O19nanoparticlesandthesedimentationratiowasonly0.88in20dayswhenthecontentofnanoparticlesreached10wt%.TheTheologicalpropertieswerecharacterizedbyaHAAKErheometerwithoutamagneticfieldandacapillaryrheometerwithandwithoutamagneticfield.TheeffectsofSrFe12O19nanoparticles,thetemperature,andmagneticfieldstrengthwereinvestigated.Inaddition,therheologicalpropertiescouldbepredictedwellusingtheimprovedHerschel-Bulkleymodel,evenunderamagneticfield.AtheoreticalmodelwasalsoproposedtopredicttheyieldstressbasedonthemicrostructureoftheMRFunderanappliedmagneticfield.

简介：DopedSrTiO3capacitor-varistormultifunctionalceramicswerefabricatedbyasinglesinteringprocess.ACcompleximpedanceanalysiswasperformedtoinvestigateelectricalfeaturesofgrainsandgrainboundariesforbothas-reducedceramicandreoxidizedceramics.Theresultsshowedthattheas-reducedceramicexhibitedinductiveresponseathighfrequenciesabove2MHz,whichisattributedtothecontributionofelectronbehaviorinsemiconductinggrains.Thehighfrequencyinductiveresponsedisappearedinimpedanceplotsofreoxidizedceramics.

简介：Sr原子的运动过程在He-Sr的亚稳亚稳的转变激光纵的搏动的分泌物被分析，一个简明前後一致的物理模型被开发。分泌物参数，主要粒子密度，电子温度，和放射激光的脉搏的时间的进化是数字地计算的。模型提供的结果同意有实验的井，和每激光脉搏的时间的行为被模拟结果成功地解释。[从作者抽象]

简介：Tianqiaocarbonate-hostedPb-Zndeposit,controlledbyNW-trendingF37thrustfaultandNW-trendingTianqiaoanticline,islocatedintheeasternpartofSichuan-Yunnan-Guizhou(SYG)Pb-Znmetallogenicprovince,southwesternYangtzeBlock,southwestChina.OrebodiesinthisdepositarehostedintheDevonian-Carboniferouscarbonaterocks,andoremineralsincludesphalerite,galenaandpyrite,whiletheganguemineralsaredominatedbycalciteanddolomite.Usinghigh–precisionsolidthermalionizationmassspectrometry(TIMS),thispaperreportsthestrontiumisotopiccompositions(0.7119to0.7167)ofsulfidesamplesfromtheTianqiaodepositinordertotracetheoriginofhydrothermalfluids.Comparedwiththecountryrocks,thecalculated87Sr/86Sr200Mavaluesofsulfiderangefrom0.7118to0.7130,higherthanthoseoftheage-correctedDevoniantoPermiansedimentaryrocks(0.7073to0.7101)andtheMiddlePermianEmeishanfloodbasalts(0.7078to0.7039),butlowerthanthoseoftheage-correctedProterozoicbasementrocks(suchastheKunyangandHuiliGroups,87Sr/86Sr200Ma=0.7243to0.7288).Thisimpliesamixedstrontiumsourcebetweentheolderbasementrocksandtheyoungercoversequences.Togetherwithgeologicandpreviousisotopicevidences,weconsideredthatthefluids'mixingisapossiblemechanismforsulfideprecipitationintheTianqiaodeposit.

简介：钡锶铝矽酸盐(BSAS)和Si/BSAS涂层经由一个二拍子的圆舞激光cladding过程在C/SiCcomposites的表面上被制作。微观结构，机械性质，和样品的水蒸汽腐蚀行为被调查。BSAS涂层被发现紧被结合到底层和仅仅一些毛孔，microcracks被观察。硅中间层的介绍被揭示减少热应力并且支持在激光cladding过程期间形成的缺点愈合。为了评估腐蚀抵抗，BSAS和Si/BSAS-coated，C/SiCcomposites暴露于50%H2在1250敢椠?慦桳潩的O和50%O2吗？

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简介：一系列新奇的镧锶铝酸盐黄磷，Ce3+-dopedLaSr2AlO(5-0.5x)Fx(LSAF)黄磷成功地在减少空气下面用高温度的稳固的州的合成过程被综合(H2/N2=1/4)。X光检查衍射模式表明那件LSAF样品是纯LaSr2有1250的sintering温度的AlO5阶段?桰獯桰牯?祢挠湯牴汯楬杮挠祲瑳污映敩摬攠癮物湯敭瑮眠瑩?汦潵楲敮椠湯?猼灵?猯灵>

简介：钡铁酸盐micro/nano纤维成功地经由由把dimethylformamide(DMF)用作溶剂的静电的旋转被准备，并且poly乙烯基pyrrolidone(PVP)作为旋转auxiliaries。结构，形态学，和磁性上的锶替换的效果被扫描电子调查显微镜(SEM)，X光检查衍射分析(XRD)，和颤动取样磁强计(VSM)。样品的XRD模式证实纯钡铁酸盐纤维形式，和Sr替换做主要山峰(110)，(107)，并且(114)稍微搬到右。另外，FE-SEM图象证明代替的纤维能保留的Sr完成含纤维的形态学。而且，当纤维在800点被锻烧时，VSM结果证明浸透磁化能到达56.7emu/g'

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简介：Solidoxidefuelcells(SOFCs)offerhighenergyconversion,lownoise,lowpollutantemission,andlowprocessingcost.Despitemanyadvantages,SOFCsfaceamajorchallengeincompetingwithothertypesoffuelcellsbecauseoftheirhighoperatingtemperature.ThenecessitytoreducetheoperationaltemperatureofSOFCshasledtothedevelopmentofresearchintothematerialsandfabricationtechnologyoffuelcells.Theuseofcompositecathodessignificantlyreducesthecathodepolarizationresistanceandexpandsthetriplephaseboundaryareaavailableforoxygenreduction.Powderpreparationandcompositecathodefabricationalsoaffecttheoverallperformanceofcompositecathodesandfuelcells.Amongmanytypesofcathodematerials,lanthanum-basedmaterialssuchaslanthanumstrontiumcobaltferrite(La1-xSrxCo1-yFeyO3-haverecentlybeendiscoveredtooffergreatcompatibilitywithceria-basedelectrolytesinperformingascompositecathodematerialsforintermediate-tolow-temperatureSOFCs(IT-LTSOFCs).Thispaperreviewsvariousceria-basedcompositecathodesforIT-LTSOFCsandfocusesontheaspectsofprogressandchallengesinmaterialstechnology.

简介：Strontium-zinc-oxide(SrZnO)filmsformingthesemiconductorlayersofthin-filmtransistors(TFTs)aredepositedbyusingion-assistedelectronbeamevaporation.Usingstrontium-oxide-dopedsemiconductors,theoff-statecurrentcanbedramaticallyreducedbythreeordersofmagnitude.Thisdramaticimprovementisattributedtotheincorporationofstrontium,whichsuppressescarriergeneration,therebyimprovingtheTFT.Additionally,thepresenceofstrontiuminhibitstheformationofzincoxide(ZnO)withthehexagonalwurtzitephaseandpermitstheformationofanunusualphaseofZnO,thussignificantlychangingthesurfacemorphologyofZnOandeffectivelyreducingthetrapdensityofthechannel.

简介：TheLa-CosubstitutedSr_（1–x）La_xFe_（12–x）Co_xO_（19）（x=0–0.5）ferriteswithappropriateBi_2O_3additivewerepreparedbyconventionalsinteringmethodandmicrowavesinteringmethodatlowsinteringtemperaturescompatiblewithLTCC（lowtemperatureco-firedceramics）systems,andtheirsinteringbehaviorwaschieflyinvestigated,includingthecrystalstructure,saturationmagnetizationMs,magneticanisotropyfieldHa,intrinsiccoercivityHci,andCurietemperatureTC.ExperimentresultsclearlyshowedthatthepureM-typecrystalphasewassuccessfullyobtainedwhentheLa-Cosubstitutionamountxdidnotexceed0.3.However,thesingleM-typephasestructuretransformedtomultiphasestructurewithfurtherincreasedx,wheretheM-typephasecoexistedwiththenon-magneticphasesuchasα-Fe_2O_3phase,La_2O_3phase,andLaCoO_3phase.AppropriateLa-CosubstitutionimprovedtheMs（〉62emu/g）,Ha（〉1400kA/m）,andHci（〉320kA/m）fortheferriteswithxvaryingfrom0.1to0.3,buttheTCdecreasedwithincreasingsubstitutionamount.Moreover,themicrowavesinteredferritescouldprovidelargerHciandsimilarMscomparedwiththeconventionalsinteredferrites.

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简介：在这糊REE集中和Sr和从Furong矿石的Bailashui锡矿床的荧石的Nd同位素组成回答的在场的作者，南部的湖南省。结果证明在荧石的REE的全部的数量通常是低的，从有在学习区域的Qitianling花岗石的类似于那些的使球粒状陨石正常化的REE分发模式的0.705～8.785μg/g，与显著否定Eu异例由LREE丰富模式描绘了。荧石在范围以内在Sr同位素组成变化0.70830.7091，价值比在这个区域的主人碳酸盐岩石的那些是比花岗石并且高的那些低的。ɛ荧石的Nd(t)价值在−9.4和+10.3之间变化，两个都揭示那外壳--并且披风来源材料涉及形成矿石的热水的液体。在这张矿床上与以前的研究结合了，Bailashui锡矿床是速度集合并且仔细空间地在这个区域与花岗石的岩浆酌联系。热水的荧石是在热水的液体和海洋的碳酸盐摇的花岗石的magmatic之间的液体/岩石相互作用的产品。而在形成矿石的液体的Sr主要来自热水的液体和海洋的碳酸盐摇的花岗石的magmatic，在形成矿石的液体的REE和F从花岗石被导出，尽管在Sr同位素组成的变化不能被这二结束成员的简单混合物解释。证据证明形成矿石的液体具有外壳披风的混合起源，但是液体可能是，这不完全地一致，这可以被不同来源的液体的不同类的混合引起。