简介：Er~（3＋）andLa~（3＋）codopedY_2O_3nanocrystallinepowdersweresynthesizedbygelcombustionmethodandcharacterizedwiththermalanalysis,X-raydiffraction（XRD）,transmissionelectronmicroscopy（TEM）,high-resolutionTEM（HRTEM）techniquesandfluorescencespectroscopy.Afterbeingcalcinedat1200oC,the（Y_（1–x）La_x）_2O_3：Er~（3＋）powderswereconfirmedtobecubicY_2O_3phasewiththecrystallinegrainsizeintherangeof20–40nm.TheEr~（3＋）emissionat1.53μmfromthe~4I_（13/2）→~4I_（15/2）transitionwasobserved,whichwasfoundtobeenhancedbyintroducingLa~（3＋）ions.SuchenhancementcouldbeattributedtotheadjustmentofEr~（3＋）ions＇localenvironmentbythecodopingofLa~（3＋）ions,leadingtotheincreasedgroundstateabsorptioncrosssectionofEr~（3＋）ions.

简介：Cr的Nanopowder:Cr的GGG和nanopowder，Nd:有从0.1at.%到1.5at.%的Cr3+的不同集中的GGG被大音阶的第五音胶化方法用醋酸和乙烯乙二醇综合。热gravimetric分析和微分扫描热量测定(TGA-DSC)，X光检查衍射(XRD)和光致发光光谱学被用来描绘粉末。当在1000点对待时，雏晶尺寸是大约58nm?????????????????猯灵?匠?猼'T资???猼灵?????????猯'T??猼灵????￣?????猯'T????猯灵??猼'T?????吗????????????????‵渠????????浮？？

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简介：YPO_4phosphorssingle-dopedwithSb~（3＋）orGd~（3＋）andco-dopedwithSb~（3＋）andGd~（3＋）werepreparedbyasolid-statereactionmethod.Thephasepurity,morphology,photoluminescenceexcitationandemissionpropertiesofthepreparedphosphorswereinvestigated.TheresultsshowedthatSb~（3＋）couldsensitizeGd~（3＋）intheco-dopedphosphorswhichmadethephosphorsexcitablebyshort-waveultraviolet（UV）atawavelengthbetween220and260nm.Under253.7nmexcitation,theco-dopedphosphorsY_（1–x–y）PO_4：Sb~（3＋）x,Gd~（3＋）yshowedstrongemissionofGd~（3＋）atawavelengthof312nmwhoseintensitychangedwiththedopingconcentrationsofGd~（3＋）andSb~（3＋）.TheoptimizedY_（0.77）PO_4：Sb~（3＋）0.07,Gd~（3＋）0.16phosphorshowedanintensitycomparabletocommercialLaPO_4：Cephosphor（UVB-315）,makingitapotentialcandidateformercurylow-pressuredischargenarrow-bandUV-Bemittinglamps.

简介：英美资源最新的产量报告显示，旗下位于巴西戈亚斯州的两家镍铁厂BarroAlto和Codemin2015年第四季度产量为1．05万金属吨，较前一季度环比增长54％，同比增长57％，主要是受益于BarroAlto两座电炉重建提前完成，并已迭产，数据显示第四季度该镍铁厂产量季比增幅达72％至8100吨，同比增长80％；Codemin季比产量增幅14％，同比增长9％，主要是矿石品位增加，该冶炼厂矿源来自BarroAlto。

简介：＂中国稀土行业协会催化材料分会2016年会＂于8月24~26日在昆明成功召开。该会议是由中国稀土行业协会催化材料分会主办,天津大学、昆明贵研催化剂有限责任公司承办,贵金属催化技术与应用国家地方联合工程实验室协办。近60名来自催化行业的上中下游企业代表、科研院所专家学者参加了会议。此次会议共有6个专题报告,从技术、市场等方面分析了催化材料行业的现状及其发展方向。

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简介：近日，从包头海关获悉，包头地区1至7月份出口稀土均价大幅增长。据包头海关统计数据，1至7月份，包头地区累计出口稀土2473．5吨，比去年同期（下同）减少20．5％；出口稀土价值1．2亿元人民币，增长21．7％；出口稀土平均价格为每吨4．8万元，上涨54．8％。

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简介：~~

简介：根据海关信息网数据显示，2016年1～6月，我国累计出口稀土产品约23213吨，与去年同期（13880吨）相比增加67．24％；出口金额累计17157万美元，与去年同期（171208万美元）相比下降0．3％。2016年上半年主要稀土产品出口均价为7．39美元／千克，与去年同期（12．40美元／千克）相比下降40.40％。自2011年以来．去年全年我同出口稀土产品首次突破3万吨，预计今年将达到4万吨，说明同外稀土市场正在逐步复苏。

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简介：ThesurfaceofacommercialY3Al5O12:Ce3+phosphorwasmodifiedby99%NH4F+CH3COOHsolutioninasupersonicbathwithwatertemperatureof80oCfor4h.Thescanningelectronmicroscopy（SEM）resultsshowedthattheedgeangleswerenotassharpastheunmodifiedparticlesandtheflatsurfacesturnedroughwithmanymicro-structurescovered.Positronlifetimemeasurementsquantitativelyshowedthatsurfacedefectswereremovedawaybymorethan50%.Asaresult,thephotoluminescencedeterminationsshowedthatthebackscatterlosswasreducedby4.2%andtheemissionpowerwasenhancedby5.6%afterthesurfacemodification.Theconversionefficiencywasgreatlyimprovedfrom47.3%to51.1%,aspresentedbythefluorescenceimages.Therefore,itwouldbegreatlyhelpfulfortheimprovementofefficiency,transparencyandstabilityofpc-LED.Moreover,thismethodwassignificantlysuitableformassproductionduetoitseasyoperationandlowcost.

简介：AdetailedstudyofthefluorescenceemissionpropertiesandenergytransfermechanisminEr3+/Tm3+co-dopedleadsilicateglasseswasreported.Enhancednearinfrared1.8μmandvisibleup-conversionemissionswereinvestigatedunder808and980nmexcitations,respectively.TheenergytransfermechanismbetweenEr3+andTm3+wasanalyzedaccordingtotheabsorptionspectra,theemissionspectraandthelevelstructuresofEr3+andTm3+.TheenergytransferefficiencybetweenEr3+andTm3+reached68.1%intheEr3+/Tm3+co-dopedleadsilicateglasseswhenpumpedby808nmlaserdiode.Basedontheabsorptionspectra,theJudd-Ofeltparameters,spontaneousemissionprobability,absorptionandemissioncrosssections,gaincoefficientswerecalculatedandanalyzed.Itwasfoundthatthecalculatedemissioncrosssectionandthemaximumgaincoefficientaround1.8μmwere4.9×10–21cm2and1.12cm–1,respectively.TheseresultsindicatedthattheEr3+/Tm3+co-dopedlead-silicateglasseshadpotentialapplicationinnearinfraredlasers.

简介：~~

简介：2016年9月26～27日，由宁波市科学技术局主办，宁波市磁性材料商会、浙江省磁性材料行业协会承办的2016第二届中国（宁波）国际磁性材料产业、技术与市场高峰论坛在宁波召开。开幕式由宁波市计量测试研究院院长阮勇主持，宁波市磁性材料商会轮值会长竺晓东、浙江省磁性材料行业协会副会长魏中华分别致欢迎辞并预祝此次论坛取得圆满成功。

简介：单斜晶、六角形的LaPO4:5mol.%Eu3+黄磷与仅仅在一样的合成温度由一个热水的方法调整答案的pH价值被综合。被不同准备影响的Eu3+-dopedLaPO4,的微观结构，形态学和光致发光调节，被X光检查衍射(XRD)描绘，扫描电子显微镜学(SEM)，Fourier变换红外线的光谱学(英尺红外)，拉曼光谱学和光光谱学分别地。然而，标本在强壮的酸答案显示出单斜晶的结构它在弱酸答案和强壮的碱答案变成了六角形的结构。单斜晶的LaPO4:Eu3+显示出最长的长度到直径比率，它被归因于优先的生长[-112]。单斜晶的标本与六角形的标本相比在红外线的系列，拉曼乐队位置和费用转移(CT)展出了细微红移动。而且，谷物尺寸的计算结果，格子参数，在在拉曼模式和排放积分紧张的半最大值的完整的宽度在对分析结果的好同意。单斜晶的标本显示出最大的绝对的光量收益(0.4)和第二一生2(0.52ms)，它与在CIE的红橘子的排放是一致的。5D07F1在六角形的标本占据了一个dominate位置，它显示在六角形的结构的更多的Eu3+被占据对称地点的倒置中心。

简介：Trivalentsamariumdopedbariummolybdate（BaMoO_4：Sm~（3＋））redphosphorwassuccessfullysynthesizedbyhydrothermalmethod.Thecrystalstructure,morphologyandphotoluminescentpropertywerecharacterizedbyX-raydiffraction,fieldenvironmentalscanningelectronmicroscopyandphotoluminescencespectroscopy.TheresultsindicatedthatthesynthesizedBaMoO_4：Sm~（3＋）phosphorconsistedofapurephasewithanoctahedralstructure.Themainexcitationpeakswerelocatedat362,404,445and477nm,respectively,andwereobviouslyobserved.Themainemissionpeakswerelocatedat533,566,602and646nm,respectively.Thephosphorsexhibitedaredperformanceat646nm,whichwasappropriatefortheultraviolet-lightemittingdiode（UV-LED）andblueLED.TheluminescentintensityofBaMoO_4：Sm~（3＋）increasedwithanincreaseinthedopingamountofSm~（3＋）.Theluminescentintensityhadtheoptimalvalueforx=0.03.WhenthedopingamountofSm~（3＋）wasfurtherincreased,theconcentrationquenchingphenomenonwasobserved.Monovalentlithium（Li＋）cationwasusedasachargecompensator.TheluminescenceintensityfirstincreasedwithincreasingLi＋dopingconcentration,andthendecreased.TheoptimalcontentofLi＋wasabout2%.TheBaMoO_4：Sm~（3＋）phosphorpreparedinthisstudycouldactassuperiorredphosphorforwhiteLEDs.

简介：TheNaGd（WO_4）_2：Eu~（3＋）phosphorswerepreparedbythemicroemulsionmediatedhydrothermalmethod.ThemorphologyandsizeofthesamplescouldbedependentonthepHintheinitialsolution.Thesephosphorsobtainedhadastrongabsorptionat395nmmatchingwiththepopularemissionofnear-UVLEDchips,andcouldemitintenseredlightat616nm.Thesmallellipsoid-likeparticlesorshortrodswereprovidedwithlargeparametersofoscillatorstrength？_2andasymmetryratio.Comparedtotheellipsoid-likephosphors,therod-likephosphorstookonstrongeremission,longerlifetimeandlargerquantumefficiency.Thisworkdemonstratedthattheone-dimensionNaGd（WO_4）_2：Eu~（3＋）phosphorsmightbeamorefavorabledevicethanzero-dimensiononesforphotoluminescence.

简介：Whitelight-emittingYVO_4：1mol.%Dy~（3＋）,xmol.%Eu~（3＋）phosphorpowderswithordermorphologyandwellcrystallizationwerehydrothermallysynthesizedat180°C.Themicrostructure,white-lightemission,andlight-emittingmechanismofthepowderswerecarefullystudiedusingX-raydiffractometry,scanningelectronmicroscopyandphotoluminescencespectra.TheexcitationandemissionspectraofthephosphorpowdersindicatedthecoexistenceofefficientenergytransferfromEu~（3＋）toDy~（3＋）andinefficientenergytransferfromDy~（3＋）toEu~（3＋）besidestheenergytransferfromVO_4~（3–）toEu~（3＋）.IncreasingtheEu~（~（3＋））concentrationinitiallyenhancedandthenweakenedtheluminescentintensityofDy~（3＋）.Thewhite-lightemissionsofYVO_4：1mol.%Dy~（3＋）,xmol.%Eu~（3＋）phosphorpowderswerebothrelatedtotheenergytransferbetweenVO_4~（3–）andDy~（3＋）/Eu~（3＋）,aswellasbetweenEu~（3＋）andDy~（3＋）.TheinefficientenergytransferfromDy~（3＋）toEu~（3＋）wasfirstfound.