简介：1·概述陶瓷刀具是机械切削加工中使用的一种新型切削刀具。它在一些工业发达国家已得到广泛的应用。在我国陶瓷刀具的推广和应用起步于五十年代,但陶瓷刀具推广和应用的进展缓慢,近年来,随着陶瓷刀具在机械切削加工中的不断推广和应用,它的作用逐渐引起了人们的重视,并得到生产实践的证实,已显示出其明显的优越性。陶瓷刀具与硬质合金刀具相比的主要优点是:陶瓷刀片的摩擦系数低,化学稳定性

简介：文章以湖南有色金属研究院运用先进的企业文化调动职工实现企业目标的积极性和创造性，做好职工的思想政治工作为实例，从如何提高职工思想文化、身体素质，提高职工生活水平与质量为目的，激发职工对企业的信任感和责任心，培养职工的群体意识与良好的精神风貌，从而齐心协力为实现研究院的总体目标而奋斗，为企业的繁荣与发展做贡献。

简介：EffectofMnsubstitutionforFeincubicLavesZr0.1Tb0.9(Fe1-xMnx)2andY0.1Tb0.9(Fe1-xMnx)2com-poundsispresented.Similarresultsinbothsystemsareobtained:ThestructureandthemagnetismofTbFe2arebothinfluencedslightlybyasmallamountofYorZrsubstitutionforTb;Withincreasingxvalue,thelatticeconstantincreasesmonotonously;theCurietemperaturedecreaseslinearly;whilesaturationmagnetizationincreaseslinearly.ForthesmallamountofMnsubstitutionforFeinbothsystems,magnetostrictionissignificantlylargerthanthatinthepureironalloys.Thelargestmagnetostrictionof|γ‖-|γ|=2200×10-6atmagneticfieldof2×107/4πA/misobtainedforY0.1Tb0.9(Fe0.95Mn0.052.

简介：Awhitelong-lastingphosphorCa2MgSi2O7:Dy3+waspreparedbythesolid-statereaction.Astrongbandpeakedat260nmwasshownintheexcitationspectrumof578nmemission,whichmightbeattributedtotheoxygendeficiencyofthehost.Afterirradiatedwith254nmfor4min,thewhiteafterglowofthesamplecouldbeseenfor3h.Moreover,thedepthsandfrequencyfactorsoftrapcenterswerecal-culatedfromthethermo-luminescencecurveofthesample,whichindicatedthatthetrapcenterscorrespondingtothe414Kbandweremorehelpfultothelong-lastingphosphorescence.

简介：近日，广东省广晟资产经营有限公司于与澳大利亚铜矿生产商泛澳公司签署入股协议，广晟公司将以每股0．395澳元的价格认购泛澳公司发行的约4．6亿股新股，投资约合1．4亿美元，获得泛澳公司增资后股本的19．9％股权，成为泛澳公司第一大股东。

简介：国家发展和改革委近日下发《医药行业“十一五”发展指导意见》（下称《意见》）。《意见》表示，中国医疗事业的发展进入关键时期，全面配套的综合改革势在必行，新的卫生体制改革目标是，2010年实现我国对WHO“人人享有卫生保健”的承诺，所有居民全部享有基本医疗保障。同时加快医药流通体制改革，进一步规范药品名称管理，实施药品通用名处方制度，建立向社会药店开放的处方管理制度，加大“医药分开核算、分开管理”、

简介：5月19日，国家节能中心在北京组织召开了重点用能单位能耗在线监测试点项目初步验收会，对系统集成与软件开发项目、基础软硬件及网络安全系统采购项目、监控室改造项目等进行初步验收。来自信息化建设、网络和信息安全、能源分析等领域的专家，听取了项目承建单位关于项目建设情况的汇报以及监理报告，审阅了相关文档，观看了系统平台演示。经过质询和讨论，专家组认为，各项目承建单位实施过程规范、文档齐全、集成测试和联调效果稳定，完成了合同规定的各项任务，同意通过初步验收。

简介：近日，科技部下发通知，内蒙古自治区包头国家钢铁及稀土深加工高新技术产业化基地跻身为国家高新技术产业化基地。截至目前，内蒙古自治区经科技部认定的国家高新技术产业化基地总数达到8家。

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简介：美国宇航局在加州帕萨迪纳的喷气推进实验室研究成功了一种制造YBa2Cu3O7-α高温超导电缆（封装在金属套管内）的新方法。据称,这种方法成本较低,过程易于控制,且对各种前体材料有很强的适应能力。该法分4个步骤:生产具有化学（配）比的前体（Precursor）粉;将前体粉包封在金属套管内;用轧制的方法使前体粉固结;在液态锂金属浴槽内进行处理,使之转变成超导组

简介：TheTiO2nanomembranedopedbyREionswerepreparedbymixingREionsintoTiO2solutionandthephoto-catalyticpropertiesofthecoatingglasswithTiO2membranedopedbyREionstomethylbenzenedegradationunderultravioletwereinvestigated.AFMphotoesshowthatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+,Ce4+,Y3+arecomposedofparticleswithdiametersof30～50nm.Theresearchesonphoto-catalyticpropertiesprovethatthesurfaceofcoatingglasswithTiO2nanomembranedopedbyREionspossessesgoodphotocatalyticpropertiesunderultravioletandthedegradationpercentsofmethylbenzenearemorethan90%whenthedegradationtimeisshorterthan160min.WhenthemoleratioofCe3+,Y3+,Ce4+toTiO2is0.002thedegradationpercentsofmethylbenzenearerespectively92.85%,91.87%and91.15%under254～365nmultravioletin50μg·ml-1methylbenzenesolution.ThephotocatalyticabilityofthesurfaceofcoatingglasswithTiO2nanomembranedopedbyCe3+underultraviolettodegrademethylbenzeneincreasesastheconcentrationsofREionsincreaseandtheiroptimumpercentageofdegradationare98.50%,97.50%and96.35.5%respectively.Thehighertheconcentrationofmethylbenzenesolutionthelowerthepercentsofthemethylbenzenedegradationofthecoatingglassare,andthebiggertheratiooftheareasofcoatingglasstothevolumeofmethylbenzenesolutionthehigherthedegradationeffectofmethylbenzeneis.

简介：Ceriasphereswithdifferentsizesandsulfurizedproductswithcorrespondingmorphologywerepreparedbyhydrothermalandgas-solidreactionmethodat600–800°CunderCS2atmosphereforashorttime,respectively.Dimensionaleffectinpreparationofγ-Ce2S3wasfirstlyinvestigatedbymeansoftechniquessuchasscanningelectronmicroscopy(SEM),X-raydiffraction(XRD),thermalgravimetricanalysis(TGA)andspectrophotometer.Theresultsshowedthatwhenceriananoparticleswithsmallsizewereusedasprecursors,theγ-Ce2S3couldbepreparedatthelowertemperatureandthebadlysinteredproductswereobtained;whenceriananoparticleswithlargesizewereemployedasprecursors,pureγ-Ce2S3wasdifficultlyobtainedevenifthetemperaturewasupto800°Candtheproductstendedtokeeptheiroriginalsize.Theheat-resistancepropertyoftheγ-Ce2S3withlargesizewasbetterthanthesmallerone,andthepureγ-Ce2S3preparedfromprecursorwithsmallsizehadagoodpigmentaryperformance.

简介：经过槽下系统的设备改造,实现了槽下过筛,入炉粉率降低,为一系列的技术进步提供了基础保障,阐述了各项生产技术进步与生产实践.

简介：CeO2nanoparticles(nano-CeO2p)wereaddedintolasercladdedNiCoCrAlYcoatingsonNi-basedsuperalloysubstratetoimprovethemicrostructureandproperties.Scanningelectronmicroscope(SEM),X-raydiffractometer(XRD),micro-hardnesstester,andheattreatmentfurnacewereemployedtoinvestigatetheirmorphologies,phases,micro-hardnessandthermalshockresistance,comparedwiththecoatingwithoutnanoparticlesadded.Theresultsshowedthatthemicrostructureandpropertiesofthecoatingswiththeaddition...

简介：对梅钢2号高炉封炉后的开炉快速达产实践进行了总结。实践表明,通过进行充分的开炉准备,实施科学合理的开炉方案以及精心地操作调剂,高炉顺利开炉,3d快速达产。

简介：AseriesofLa2O3/MCnylonnanocompositeswerepreparedviainsitupolymerization.Theeffectsofcontentofnano-La2O3onthemechanicalpropertiesofnanocompositeswerestudied.Dispersionofnano-La2O3inMCnylonmatrixwasobservedwithSEM.ThecrystalstructureofnanocompositeswascharacterizedbymeansofXRD.SEManalysisshowsthatLa2O3nanoparticlesareuniformlydispersedinMCnylonmatrixandlittleclusteringexistswhenthecontentofnano-La2O3islowerthan1%,however,whenthecontentofnano-La2O3ismorethan1%,itbeginstocluster.XRDanalysisindicatsthatnano-La2O3doesnotchangethecrystalstructureofMCnylon.Mechanicalpropertiestestsshowthatthetensilestrength,elongationatbreak,impactstrength,flexuralstrength,andflexuralmodulusofnanocompositesfirstincreasethendecreaseasthecontentofnano-La2O3isincreased.Whenthecontentofnano-La2O3is0.5%,thetensilestrengthandelongationatbreakofnanocompositesreachmaximum,whichare17.9%and52.1%higherrespectivelythanthoseofMCnylon.Whenthecontentofnano-La2O3is1.0%,theimpactstrength,flexuralstrengthandflexuralmodulusofnanocompositesreachmaximum,whichare36.6%,12.7%and16.3%higherrespectivelythanthoseofMCnylon.

简介：Anisotropicstructures,nanoneedles,andnanospindlesofrareearthhydroxychloride(RE(OH)2Cl)andoxychloride(REOCl)(rareearth=EuandTb)weresynthesized.Therareearthhydroxychloridenanostructureswereformedviaathermallyassistedhydrolysisoftherare-earthsesquioxidenanocrystals.Themorphologicalevolutionofthenanostructureswasstudiedusinghigh-resolutiontransmissionelec-tronmicroscopyandscanningelectronmicroscopy,whilethestructuralevolutionwasinvestigatedusingX-raydiffractiontechniques.Thethermalstabilityoftherareearthhydroxychlorideswasinvestigatedusingthermogravimetricanalysis.Therareearthoxychloridenanospin-dlesweresynthesizedviaasimpleheat-treatmentofrareearthhydroxychloridenanospindles.

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简介：介绍宁钢2号高炉热风炉因隔墙砖发生坍塌导致低风温生产而带来的问题,并针对问题提出相应的技术操作措施,包括通过改进送风模式稳定风温水平,通过采取上、下部调剂相匹配的措施保证气流的稳定分布,通过调整进风口面积和炉顶压力维持一定的鼓风动能和理论燃烧温度,通过控制合适的炉温和炉渣碱度确保炉况稳定顺行。

简介：TheAu/CeO2catalystsweresynthesizedbyco-precipitation(CP),deposition-precipitation(DP)andmetalliccolloidsdeposition(MCD)method,andtestedforoxidationofvolatileorganiccompounds(VOCs).ItwasrevealedthattheAu/CeO2catalystpreparedbyDPmethodwasthemostefficientcatalysttowardsthetotaloxidationoftoluene.TheAu/CeO2catalystshadobviouslyhighcatalyticactivity,andthebestresultswasobtainedon3wt.%Au/CeO2catalystpreparedbyDPmethod.Thesecatalystswerechara...