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简介：ＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈｌｏｒｏａｒｏｍａｔｉｃｓｗｉｔｈＤｉｃｙｃｌｏｐｅｎｔａｄｉｅｎｙｌＹｔｔｒｉｕｍＣｈｌｏｒｉｄｅⅡＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈ...

简介：ＩｎｔｒｏｄｕｃｔｉｏｎＩＭＩ８２９ｔｉｔａｎｉｕｍａｌｏｙｉｓａｋｉｎｄｏｆｈｉｇｈｔｅｍｐｅｒａｔｕｒｅｎｅａｒαａｌｏｙ．Ｉｔｓｓｅｒｖｉｃｅｔｅｍｐｅｒａｔｕｒｅｉｓｕｐｔｏ５８０℃．ＩｔｈａｓｂｅｅｎｕｓｅｄｉｎＲＢ２１１５２５Ｅ４ｅｎ...

简介：Yttriumoxidenanopowderwaspreparedbyanoveltechniqueusinganalginatebiopolymerasaprecursor.Thetechniqueisbasedonthermaldecompositionofanyttriumalginategel,whichisproducedintheformofbeadsbyionicgelationbetweentheyttriumsolutionandsodiumalginate.Theeffectofpost-annealingtemperatureontheparticlesizeofthenanocrystalswasinvestigatedatvarioustemperatures.TheproductswerecharacterizedusingX-raydiffraction,scanningelectronmicroscopy,andatomicforcemicroscopy.ThesizeofthenanocrystallineY2O3particlesvariedfrom22.7to38.7nm,dependingontheannealingtemperatureandtime.Thegrainsizedistribution（GSD）wasalsodetermined.TheGSDbecamemorenon-symmetricalastheannealingtemperatureincreased,andthewidthofthedistributionsforthepowdersproducedusingthealginatemethodwaslessaffectedbyheattreatment.Thisalginatemethodwascomparedwiththeconventionalglycinecombustionmethod,onthebasisofparticlesize.Theparticlesobtainedusingtheproposedtechniqueweresmallerthanthoseobtainedusingthecombustionmethod.Alginate-assistedthermaldecompositionisthereforeaneasyandcost-effectivemethodforpreparingnanosizedY2O3crystals.

简介：TheeffectofrareearthelementyttriumonthehightemperatureoxidationresistanceofadirectionallysolidifiedNi-basesuperalloywasstudiedwithscanningelectronmicroscopy(SEM),energydispersivespectrum(EDS)andX-raydiffraction(XRD)techniques.Theresultsshowthattheoxidationresistanceofthealloyissubstantiallyimprovedbyaddingproperamountofyttrium.

简介：用硝酸盐先锋，为做钕的钇铝石榴石(钇铝柘榴石)的准备的一个新奇弄干水花的帮助柠檬酸盐胶化过程阶段被开发。单相的多晶的钇铝柘榴石的合成在象800一样低的温度被完成

简介：Ytterbium-dopedyttriumoxysulfide(Yb:Y_2O_2S)hasbeensynthesizedbysolid-statereactionwithsulfideflux.DiffusereflectionandemissionspectrahavebeenmeasuredinordertodeterminethecrystalfieldsplittingofYb~(3+)ionintheYOSlattice.Accordingtothecrystal-fieldlevelsprobedinthespectra,thecrystalfieldsplittingof~2F_(7/2)manifoldofYb~(3+)ioninYOSis709cm~(-1),whichislargeenoughforthequasi-three-levellaseroperationofYb~(3+)ion.Emissionpeakposition,width,full-widthathalfmaximum(FWHM),andnormalizedintensityofYb:YOSarefittedfromitsemissionspectrum.Forcomparison,relevantdataof5.4at.-%Yb:YAGisalsoprovided.

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简介：以二不同纯净的Zr开始，基于Ti的体积有Ti40Zr25Cu12Ni320被准备。在形成合金的能力(GFA)的玻璃上的0.2at.%，0.4at.%，0.5at.%，0.6at.%，和1at.%的层次的钇的增加的效果借助于金属组织学，X光检查衍射，和微分扫描热量测定被调查了。试验性的数据显示高杂质内容戏剧性地减少形成能力的玻璃。有0.5at.%Y的Microalloying在压制水晶的阶段形成并且在低纯净的合金减轻氧的有害效果是有效的。相反在包含高纯净的元素的合金，有效的钇增加是不到0.4at.%。结果显示最佳掺杂物的有益的效果主要由于清除是经由无害的阶段的形成的氧杂质。

简介：Y-ModifiedUSYwaspreparedbyionexchangeofUSYslurrywith0.01mol·L-1Y(NO3)3.Phosphotungsticacid(HPW)catalystsupportedonUSYandY-USYwaspreparedbyanimpregnationmethod.ThematerialswerecharacterizedbyNH3-TPD,XRD,andN2adsorption.Theactivityfortheremovalofthiophenewasexaminedinathree-neckedflask.ThesulfurcontentofmodelcompoundwastestedonWK-2Dmicrocoulometricdetector.TheeffectofyttriumandHPWcontent,reactiontemperatureandcatalysts,activationtemperatureontheactivityofcatalystswereinvestigated.ItwasshownthattheoxidationactivityofthiophenedecreasedwiththeincreaseofYcontentexceptforthecatalystofY5%.HPWcontenthadlimitinfluenceonactivityofcatalysts.Theoptimalreactiontemperatureandactivationtemperaturewere40and320℃,respectively.

简介：以便改进金属压路机的表演，Mo+Y2O3合金粉末由CO2激光为激光表面alloying处理在40Cr钢压路机底层的表面上一致地习惯于上衣，结果证明许多好后果在增加稀土元素氧化物Y2O3以后被获得。合金层的水晶谷物显著地被精制。水晶谷物的边界被加强。微观结构的一致性和密度被增加。坚硬和合金层的穿的抵抗更加被改进。合金层的原子价电子结构分析被固体和分子(EET)的实验电子理论做。计算结果证明Y应该在第一个阶段被混合，Fe应该在第十八个混合乐队。说明的分析结果稳固的答案的电子理论在alloying上显示出加强的效果层，它提高了契约并且证实了试验性的结果。

简介：Additionofrareearth（RE）suchasYinthesurfacelayerofgraycastironorNi-basedsuperalloybylasersutfacemeltingwascarriedoutusinga2kWCO2laser.FordeliveringtheelementYtothemetalsurfacedur-inglaserirradiation,severalmethodswereemployed.ItisfoundthatY-containingsurfacemodifiedlayercanhecontrollablyobtainedonsubstrates,agraycastironcanbelasersurface-modifiedwithCr+Al-Ypowderre-sultinginathinlayerofFe-Cr-Al-Yalloysuchas30Fe40Cr27Al3Y.

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简介：Nd:钇铝柘榴石先锋粉末被同类的降水，和Nd综合:钇铝柘榴石透明陶艺被真空sintering为5h在1700°C作好准备。陶器的材料被轻发射度和地排放枪环境扫描显微镜描绘。用统计和立方米科学理论，学习在在轻发射度和立体声之间的量的关系上被执行在三维的欧几里德几何学的空格的逻辑参数。这被发现Nd的发射度:有在厚度的1公里的钇铝柘榴石分别地在可见、在红外线附近的波长是大约45%和58%。发射度线性地与增加相等的范围直径增加并且当相等的范围直径是20μm时，到达单个水晶的理论价值。有每统一谷物和分离谷物的体积增加吝啬的特定的区域的发射度减少，和有增加的发射度减少在Nd意味着谷物的免费距离:钇铝柘榴石陶艺。

简介：Magneto-opticFaradayrotationeffectandtheamountofbismuthsubstitutedinyttriumirongarnetsinglecrystalfilmspreparedbygel-coatingonmodifiedgadolinium-galliumgarnetsubstratesareinvestigated,wherethegelissynthesizedbyasol-gelreactionofnitratesandethyleneglycol.Thecoatedgelisannealedinairattemperaturesupto660℃for4h,whichisabout300℃lowerthanthatofliquid-phaseepitaxy.ThemaximumamountofBisubstitutionisx=2.7andthecrystallizationtemperatureofgarnetphasedecreaseswiththeincreaseofxdownto520℃forx=2.7.Inthisfilm,ahugeFaradayrotationof-8.1×104(°)/cmatλ=0.633μmisobtained.

简介：AIM:Tocomparesurgicalpeelingandaspirationandneodymiumyttriumgarnetlasercapsulotomyforpearlformofposteriorcapsuleopacification(PCO).METHODS:Aprospective,randomized,doubleblind,studywasdoneatRotaryEyeHospital,Maranda,Palampur,India,SantoshMedicalCollegeHospital,Ghaziabad,IndiaandLaserEyeClinic,NoidaIndia.ConsecutivepatientswithpearlformofPCOfollowingsurgery,phacoemulsification,manualsmallincisioncataractsurgeryandconventionalextracapsularcataractextraction(ECCE)foragerelatedcataract,wererandomizedtohavepeelingandaspirationorneodymiumyttriumgarnetlasercapsulotomy.Correcteddistancevisualacuity(CDVA),intra-operativeandpostoperativecomplicationswerecompared.RESULTS:Atotalof634patientsparticipatedinthestudy,and314(49.5%)patientswererandomizedtosurgicalpeelingandaspirationgroupand320(50.5%)totheNd:YAGlasergroup.Themeanpre-procedurallogMARCDVAinpeelingandneodymium:yttrium-aluminium-garnet(Nd:YAG)lasergroupwas0.80±0.25and0.86±0.22,respectively.ThemeanfinalCDVAinpeelinggroup(0.22±0.23)wascomparabletoNd:YAGgroup(0.24±0.28;t-test,P=0.240).Therewasasignificantimprovementinvisionafterboththeprocedures(P<0.001).AslightlyhigherpercentageofpatientsinNd:YAGlasergroup(283/88.3%)thaninpeelinggroup(262/83.4%)hadaCDVAof0.5(20/63)orbetterat9mo(P<0.001).Onthecontrary,patientshavingCDVAworsethan1.00(20/200)wasalsosignificantlyhigherinNd:YAGlasergroupascomparedtopeelinggroup(25/7.7%vs15/4.7%,respectively).OnapplicationofANCOVA,therewaslessthan0.001%riskthatPCOthicknessandtotallaserenergyhadnoeffectonrateofcomplicationsinNd:YAGlasergroupandlessthan0.001%riskthatPCOthicknesshadnoeffectoncomplicationsinpeelinggrouprespectively.SumofsquareanalysissuggeststhatintheNd:YAGlasergroup,thickPCOhadastrongerimpactoncomplications(Fischertestprobability,Pr<0.0001)

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简介：试图为高温度的熔融的盐反应堆的安装和电极的建设开发材料，在750和950湩爠晥湩浥湥?瑳敲杮桴湥湩?猠汯摩猠汯瑵潩?瑳敲杮桴湥湩?眠牯?慨摲湥湩?愠摮瀠敲楣楰慴楴湯猠牴湥瑧敨楮杮的Ni-11Fe-10Cu的高温度的氧化行为上的艾尔和Y的效果

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