简介：以CH3COOLi·2H2O和锐钛矿型TiO2为原料，通过直接融盐法合成锂离子电池负极材料Li4/3Ti5/3O4，考察合成条件对材料性能的影响，并通过X射线衍射仪（XRD）和扫描电镜（SEM）对样品进行物相和形貌分析。结果表明，先在70℃保温5h或10h，再在800℃煅烧2h可得到纯相的Li4／3Ti5/304粉末，平均粒径在300nm左右，且粒径分布均匀。充放电测试表明在70℃保温5h、800℃煅烧2h得到的样品具有最优异的电化学性能。以0．1C倍率充放电，其首次放电容量达到172（mA．h）／g，接近理论容量，20次循环后，容量仍保持在140（mA·h）／g。与传统的固相法相比，用直接融盐法得到的材料具有较大的锂离子扩散速率、高倍率性能和循环可逆性。

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.

简介：该程序包于1989年12月经中国有色金属工业总公司鉴定通过。程序包由选矿流程计算主程序、数质量流程图绘制主程序、高级[3ASICA语言与AutoCAD联接主程序等三部分组成。每个主程序又包括许多子程序,如选矿流程计算主程序有:磨矿流程计

简介：在编制施工图预算过程中,常用的方法有单价法、实物法。单价法通常是指在编制施工图预算时,根据地区统一单位估价表中的各项工程预算价格,乘以相应的各分项工

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简介：Eu-activatedCaMoO4phosphorswereco-precipitatedinanaqueoussolution,andNH3·H2O,NH4HCO3and(NH2)2COaspre-cipitatingaidagentswerecomparedbasedonthemorphologyandparticlesizedistributionofthephosphorsamples.Sm3+assensitizerionwasinvestigatedontheluminescenceofCaMoO4:Eu,anditcouldstrengthenthe406nmabsorptionofthisphosphor.Atlast,thescheeliteCaMoO4:EuandwolframiteZnMoO4:Euwereselectedtocomparetheirhostabsorption.TheresultshowedthatthescheelitemolybdatehostexhibitedstrongerUVabsorptionthanwolframiteone.

简介：本文通过对酒钢450m~3高炉料位计工作原理及工艺联锁功能的介绍,针对检测系统在日常生产中所存在的问题,从硬件和软件两方面对料位计及其联锁功能进行了完善和优化,提高了料位检测系统的稳定性和安全性。

简介：Thecoilingtemperatureofthehotstriprollingprocessplaysanimportantroleinstripqualitycontrol.Thenewly-builtlaminarflowcoolingcontrolsystemwasindependentlydevelopedbyBaosteel.L2conductstotallydynamiccontrol(L1onlyexecutestheresultfromL2,anddoesnotconductanydynamiccontrol).Thesystemhasmanyadvantages,suchasquickreal-timecontrol,accuratemodelcalculation,quickresponseafterself-adaptation,etc.Comparedwiththe2050mmhotstriprollingline,thenewsystemcansatisfythestrictcoolingrequirementsofhighstrengthsteel,siliconsteelandheavyplatesbecauseofitsnewly-developedtechnologiesofcoolingratecontrol,stripcoolingbysectionsandproportion-integral-differentialcoefficient(PID)feedbackfuzzycontrol.

简介：AseriesofMn-basedcatalysts,MnOx,MnOx-CeO2,Pd-Mn-Ce,MnOx/ACwereprepared.AndtheirperformancesforNOlow-temperatureSCRwereinvestigatedinthisstudy.TheNOconversionisabout90%at100℃onMnOx-CeO2andalmostallNOcanbeconvertedat120℃.SimilarresultsarealsoobservedinthetestsonMnOx-CeO2/AC.Theexcellentlow-temperaturecatalyticactivityofmodifiedMn-basedcatalysts,whichmaybemainlyduetotheoxygenstoragefunctionofCeO2,canimprovetheoxygenflowonthecatalystssurface.ThentheoxidationofNOtoNO2isaccelerated,whichisthekeystepofNOSCR.

简介：对唐钢二炼钢厂3号连铸车间使用的火焰切割机切割完成率与定尺率偏低问题进行了分析，并对火焰切割机的改造进行了说明。这些措施的采用最终满足了产品的技术要求。

简介：ThedopedZnOnanorodsasaphotocatalystwithdifferentEucontentswerepreparedbymicrowaveassistedmethodandtheywerecharacterizedbymeansofX-raydiffraction(XRD),energy-dispersiveX-rayspectroscopy(EDS),UV-Visspectroscopy,surfaceareaBrunauer-Emmett-Teller(BET),X-rayphotoelectronspectroscopy(XPS),scanningelectronmicroscopy(SEM)andtransmissionelectronmicroscopy(TEM).TheaveragecrystallitesizeandbandgapenergyofEu-dopedZnOwerevariedwiththeEucontent.TheXRDpatternofEu-dopedZnOindicatedhexagonalcrystalstructurewithanaveragecrystallitesizeof25nm.ThepresenceofeuropiumwithtrivalentstateanditsdopingsuccessfullyintothecrystallatticeofZnOmatrixwereconfirmedbyXPStechnique.ThephotocatalyticactivityofEu-dopedZnOnanorodswasevaluatedformethylorangedegradation.Thephotocatalyticexperimentsshowed～91%degradationofmethylorangeover0.2mol.%EudopedZnOsamplewithin3hunderUVlight(365nm).

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简介：系统地总结了南钢300m^3级高炉生产技术进步。近年来，炼铁厂通过改善原燃料质量，优化用料结构；实施技改技措，提高高炉装备水平；加强高炉操作，确保炉况稳定顺行；优化高炉工艺，进行强化冶炼；加强基础管理，确保高炉生产等措施，取得了良好的技术经济指标。

简介：NanosizedBaCeo.95Yo.o5O3-δpowderswiththehomogeneouscompositionweresynthesizedbyanewcombustionprocessbasedonthePechinimethod.Apolymericprecursorsolwasformedbyuseofcitricacidandethyleneglycolasthechelatingagentsofmetalions.Theperovskite-typeBaCeo.95Yo.o5O3-δpowderswithuniformshapeandsmallerthan40nminsizedwereobtainedthroughthecombustionofthepolymericprecursorsolattheexistenceofnitricacidandammoniumhydroxide.Itwasfoundtheparticlesizecouldbecontrolledbymodulatingthequantitiesofnitricacidandammoniumhydroxide,thequantitiesoftheresidue,carbonateionswerealsoaffectedbythequantitiesofthecitricacidandethyleneglycol.

简介：承钢炼铁厂300m^2高炉液压炉顶不上钟油缸底座由于小钟与油缸活塞杆行程相差60mm，每天小钟开关频繁，各部位刚性连接，使油罐底座经常被损坏。将活塞杆与平衡臂连接销于曲φ100mm改为φ80mm；油缸底座的轴承套去掉；小钟行程调到670mm；关钟时间由原7s改为10s，但磨损仍较重。1995年9月第二座高炉小钟油缸底座改为滑块式，滑块行程65mm，小种行程调整到650mm，使用效果良好。

简介：根据以往喷煤工程的经验,结合炼铁新厂3#高炉喷煤工艺特点,采用了模糊控制技术,提高了小时喷煤量的控制精度,提高了喷煤系统设备的安全性与稳定性,为高炉的稳定顺行、低能耗高产出创造了条件。

简介：YbF2.357,YbF3,Ba2YbF7,andBa2upconversionnanocrystalsdopedwithemitterEr3+ionweresynthesizedinthesamesolventsystemjustwithchangingthemolarratioofBa2+toYb3+intheprecursor,whichcorresponedtothecrystalphasesofrhombohedral,orthorhombic,tetragonal,andcubic,respectively.Allthesamplesemittedboth660nmredlightand543/523nmgreenlightwhichoriginatedfromEr3+-4fnelectronictransitions4F9/2-4I15/2and4S3/2/2H11/2-4I15/2,respectively.ItwasworthmentioningthatYbF3:Er3+,Ba2YbF7:Er3+,andBaF2:Er3+couldemitdazzlinglybrightlightevenundertheexcitationofa980nmCWlaserwithoutputpowerof0.1W.Upconversionemissionmechanismanalysisindicatedthattheintensityratioofredtogreenlighthighlydependedonthesynergisticeffectofcrystalstructure,concentrationquenching,andparticlesize,butwerenotsensitivetocrystallinityaspreviouslyreportedforNaLnF4（Ln=lanthanide）.

简介：近日，江西省科技厅在南昌组织召开了国家铜冶炼及加工工程技术研究中心科研项目鉴定会，标志着江西又有3项铜冶炼及加工技术再上新台阶，达国际水平。鉴定会由中国工程院院士邱定蕃主持。

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简介：氪、氙是空气中的稀有气体,由于具有一定的特性,使氪、氙应用前景广泛,空分中存在多种稀有气体,其中氪、氙含量最少,由于提取工艺复杂,价位高昂,俗称"黄金气体",空分中的氪、氙主要在液氧中,通常伴随产品氧气或液氧排出而被带走,随着空分设备日益大型化,提取氪、氙的原料气液氧产能增加,从液氧中提取氪、氙蕴藏着巨大经济前景。