简介：Pr2Fe14B-La2Fe14B系统被衍射(XRD)，微分扫描热量测定(DSC)和扫描电子显微镜学(SEM)与精力装备了的X光检查粉末调查散X光检查光谱学(版本)。水晶结构参数被完整侧面的Rietveld精炼决定。结果揭示了那所有合金(Pr1-xLax)2Fe14B使Nd2Fe14有空格组P42/mnm的B类型结构并且形成了连续固体在x=0.0之间的解决方案并且1.0。格子参数一，c，单位房间体积V和c/a比率与La集中线性地增加了。由thermogravimetry分析决定了，居里温度(TC),阶段转变温度和融化的温度(Pr1-xLax)2Fe14B在La内容之上线性地减少了。基于DSC大小和X光检查粉末衍射考试的结果，Pr2Fe14B-La2Fe14B系统被建立。

简介：Magnetizationanddemagnetizationcurvesandhysteresisloopsapplieddifferentmagnetizing.fieldsinsinteredNd-Fe-BandNd-Dy-Fe-Bmagnetsfromthermallydemagnetizedanddcfield-demagnetizedstateswereinvestigatedattemperaturesofupto150℃.Thefirst-quadrantremagnetizationcurvesandthecurvesofcoerciveforces_MH_CversusrernagnetizingfietdsH_mfromdcfield-demagnetizedstateatroomtemperatureshowasteparoundmagnetizingfieldasabsolutevalueofthemaximumintrinsiccoercivity.Thestepsof_MH_C-H_mcurvesshiftedtolowerremagnetizingfieldsandtheshapesofmagnetizationcurveschangedfromsteptypetoprecipitoustypewhentemperaturewentupto100～150℃orafterthespecimenwasthermallydemagnetizedatatemperaturehigherthantheCurietemperature.Thesteepriseofkneecoereivitywithincreasingmagnetizingfieldisbehindthatof_MH_C.NotethatthemagnetichardeninginsinteredNd-Fe-Bmagnetsiscontrolledbypinningofdomainwalls.

简介：代号为Ｂ３１２的苯乙烯膦酸单仲烷基（Ｃ１１－１３）酯的实用性质表明，Ｂ３１２符合工业萃取剂所应具备的条件。

简介：通过生产过程参数对比,查找宏观原因,并进行解剖,用SEM扫描电镜进行能谱分析,定性分析AAR-B车轮超声检测缺陷的原因,制定改进措施,使产品质量稳定。

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简介：介绍了紫金铜业的诱导法和某厂的并联循环电积脱铜砷，并对两者工艺流程、特点和应用情况进行对比分析。诱导法脱杂环保、全面，但能耗较大、电效不高。并联循环法在对砷有很好的脱除率和电流效率，需处理黑铜量少，工艺参数控制简单。

简介：Microporoustitaniumdioxidefilmswerepreparedbythesol-gelmethodsonglasssubstrates,usingtetrabutyltitanateassourcematerial.Inordertoabsorbthevisiblelightandincreasethephotocatalyticactivities,differentconcentrationsofneodymiumions(Nd/Timolarratiowas0.5%,0.7%,0.9%,and1.1%respectively)wereaddedintothesol.X-raydiffraction(XRD),X-rayphotoelectronspectros-copy(XPS),andatomforcemicroscopy(AFM)wereappliedtocharacterizethemodifiedfilms.Akindoftypicaltextileindustrypollutant(RhodamineB)wasusedtoevaluatethephotocatalyticactivitiesofthefilmsundervisiblelight.TheresultsshowedthattheactivitiesofthefilmswereimprovedbydopingNdionsintothesol.

简介：ISP铅锌冶炼工艺中,通过扩大产能、提高鼓风炉热风温度、利用低热值煤气发电、提高水循环效率、余热利用和应用变频调速技术等,取得了较好的节能效果。

简介：Theaimofthisresearchistopulseco-depositnano-CeO2particlesintoNi-W-Balloycoatingsinordertoimprovethesurfaceproperties.Theinfluenceofpulsefrequencyanddutycircleondepositionrate,microhardnessandmicrostructures,andtheinfluenceofheattreatmenttemperatureonphasestructures,microhardnessandabrasivityofNi-W-B-CeO2compositecoatingswereinvestigated.Theresultsindicatedthatthepulseco-depositionofnickel,tungsten,boronandnano-CeO2particlefromthebathwhichnano-CeO2particlewassuspendedbyhighspeedmechanicalstirringledtotheNi-W-B-CeO2compositecoatings,possessingbettermicrohardnessandabrasionresistancewhenheat-treatedat400℃for1h.Themicrohardnessas-depositedwith636Hzandthedepositionratewith0.0281mm·h-1wasthehighestatpulsefrequencywith1000Hzandpulsedutycirclewith10%.Microstructuresanalysisdisplaysthatdecreasingpulsedutycycleleadstorefinementingrainstructuresandtheimprovementofmicrostructures.X-raydiffractionshowsthatthecompositecoatingas-depositedwasmainlyintheamorphousstateandpartiallycrystallized,butwhenheattreatedat400℃,thecrystallizationtrendwasstrengthenedfurther.

简介：对10B21冷镦钢盘条出现的冷镦开裂现象,用光学显微镜、扫描电镜、直读光谱仪对缺陷部位进行了显微组织、化学成分等分析。结果表明,冷镦开裂是由钢坯裂纹缺陷所导致,且通过Ti元素的加入,杜绝了钢坯裂纹的产生。

简介：InordertoimproveandstabilizethemagneticpropertiesofnanocompositeNd2Fe14B/α-Femagneticalloysbyacompositionaladjustment,smallamountofDyand/orCowasaddedtoNd9Fe84B7alloys.DTAanalysisontheamorphousofthealloystookplaceasthesoftmagneticphaseswerecrystallized,andthenthehardmagneticNd2Fe14Bwasprecipitatedfromthem.Whileα-Feandametastable1:7(TbCu7-type)phasewereformedsimultaneouslyinDyandCo-freealloys,theywerecrystallizedseparatelyatdifferenttemperaturesafterDyorCowasadded.ThisphaseseparationoccurredmoreclearlyintheDy-treatedalloysandtheothersoftmagneticphaseFe3BwasalsostabilizedbyDyand/orCo.The1:7phasethatwasstabilizedbyDyand/orCowasnoteliminatedat700℃,decreasingmagneticpropertiesofthealloys.Itwaseventuallydisappearedabove725℃,butFe3Bwasnoteliminatedevenat750℃whenDywasaddedmorethan0.5at%orCowasaddedmorethan2.0at%.AmountofNd2Fe14BinthealloystendedtoincreaseasDyadditionincreased,whereasCoadditiondidnotleadtoanyappreciablechangeintheratioofα-FeandNd2Fe14B.Moreover,DyadditionapparentlyincreasedcoercivityofanalloywhileCoadditionhadabeneficialeffectonremanence.ThegrainsintheDytreatedalloyswereusuallyfinerthanthoseintheCo-treatedalloys.Thegrainsizeofbothα-FeandNd2Fe14Binthealloysexhibitingmr≥0.72wasintherangeof20～40nmorevenlarger50nm,whichislargerthanthetheoreticaloptimumsize(～10nm).TypicalmagneticpropertiesobtainedfromaNd7.5Dy1.5Fe82.5Co1.5B7alloyannealedfor12minat725℃wereiHc=4.85kOe,Br=11.32kG,(BH)max=15.73MGOe,andmr=0.73.

简介：介绍了＂倾角法＂测量水平距离的基本原理及计算公式,并且将其与钢尺量距法、视距法在特殊地形情况下进行简单对比,然后指出＂倾角法＂在轴线平移中的应用。

简介：介绍了金隆铜业有限公司环集脱硫氧化镁清液法脱硫技术,该技术具有脱硫效率高、投资费用低,运行成本低、脱硫渣易处置、运行可靠等特点,创造性的增加了预脱硫系统,在预脱硫与主脱硫的完美结合上解决高浓度SO2尾气的超标问题。该技术的应用为高浓度烟气集气脱硫提供了一种新的解决方案。

简介：四氧化三钴是一种重要的功能材料，主要用于生产锂离子电池正极材料钴酸锂。目前，制备四氧化三钴材料的主要方法有：溶液燃烧法，水热法，溶剂热法、溶胶一凝胶法、微波法等。本文研究用液相沉淀法生成CoOOH，研究了试验过程中终点pH值，反应温度，不同碱氨配比对实验结果的影响。用此方法可以合成CoOOH，通过控制前驱体合成过程的各个影响因素，可以控制CoOOH的粒度、松比、振实等，得到比较理想的样品。后续通过煅烧CoOOH可以制备符合要求的钴酸锂。

简介：形成，磁性和微观结构上的公司替换和退火的处理的效果(NdDyTb)12.3(FeZrNbCu)快速的熄灭并且随后的退火准备的81.7-xCoxB6(x=015)带子系统地借助于微分扫描热量计(DSC)被调查，X光检查衍射(XRD)，扫描电子显微镜学(HRSEM)和颤动的样品磁强计(VSM)的高分辨率。阶段分析揭示了单相的材料。顽磁极化Jr和最大与从0～12增加x增加了然后为x=15减少了的最大的精力产品(BH)。内在的coercivityHci(NdDyTb)12.3(FeZrNbCu)最佳地处理的81.7xCoxB6带子为x=15为x=0从1308.7kA/m减少了到817.4kA/m。有Jr=1.041T的最佳磁性，Hci=944.9kA/m并且(BH)max=155.1kJ/m3被退火完成在675吠敨琠牥業慮?桴潩?牧畯獰?的融化旋转带子(x=12)??湩琠敨?呐?偍????敷敲椠?楳畴漠楸楤敺?湩潴猠汵潦楮?捡摩朠潲灵?匨??琠？？

简介：EnvironmentalfriendlyrecyclingprocessforNd-Fe-Bsinteredmagnetsludgesgeneratedinthemanufacturingprocess,whichcontainlargeamountofrareearth,includingNd,PrandDy,isbadlyneededsofar.Inpresentstudy,wehavedevelopedaneffectiveroutetoobtainrecycledsinteredmagnetsfromNd-Fe-Bsinteredmagnetsludgesbycalciumreduction-diffusion（RD）process.Comparedtoconventionalrecyclingprocess,ourresearchisfocusedonrecoveringmostoftheusefulelements,includingNd,Pr,Dy,Co,andFetogetherinsteadofjustrareearthelements.Toimprovetherecyclingefficiencyandreducepollution,theco-precipitatingparametersweresimulatedandcalculatedusingMATLABsoftware.Mostofusefulelementswererecoveredbyaco-precipitationmethod,andtheobtainedcompositepowderswerethendirectlyfabricatedasrecycledNd-Fe-Bpowdersbyacalciumreduction-diffusion（RD）method.Therecoveryratesare98%,99%,99%,93%,and99%,forNd,Pr,Dy,Co,andFe,respectively.Theamountofusefulelementscontainedintherecoveredcompositepowdersisgreaterthan99.71wt%.TheprocessofRDforsynthesizingNd2Fe14BandsubsequentlyremovingCaOwasthoroughlyinvestigated.Furthermore,therecycledNd-Fe-Bmagnetexhibitsaremanenceof1.1T,acoercivityof1053kA/m,andanenergyproductof235.6kJ/m3,respectively,indicatingthatrecycledNd-Fe-Bsinteredmagnetwassuccessfullyrecoveredfromtheseverelycontaminatedsludgesviaaneffectiverecyclingroute.

简介：以冶炼烟气管道波纹伸缩节使用情况为例,介绍波纹伸缩节工作原理及使用过程中出现的问题,并对其修复方法进行研究改进,改进后的技术可广泛应用于各行各业,为类似高难度伸缩节的修复提供参考。

简介：从铁水预处理概念入手,以凌钢KR法铁水脱硫工程为案例,对该工程的工艺流程、设备组成及各种设备形式的优缺点进行了论述,为KR法铁水脱硫的设计提供了经验。

简介：铬天青S(CAS)作为铝的显色剂灵敏度高,已广泛应用于钢铁、铁合金及其它金属材料中铝的测定,但应用于矿石中铝的测定报导甚少。本文采用抗坏血酸、Zn-EDTA联合掩蔽,直接光度法测定锰矿中的铝,经过大量试验,获得了满意结果。本法灵敏度高、快速、准确,适合于日常生产分析。

简介：德国斯图加特技术专科学校喷射机械研究所于近期开发出铝及铝合金激光焊接新技术,并已进入商业化应用阶段,填补了铝的工业焊接技术领域的一项空白。铝是一种很难焊接的金属,一是因为它极易氧化,形成Al2O3,特别是温度高时,二是因为它的热导率高,若用普通焊枪焊接,热被铝件迅速吸走,金属膨胀,焊接处达不到所要求的温度。德国新开发的激光焊接器能量高,可聚焦成极小的焊点,即使铝导热快,也能在焊接处保持足够的焊接温度。激光所照之处铝便熔化,因而,只需移动焊枪,便可把需要