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简介：ThispaperreviewsthehistoryofdevelopmentandproductionofsilicabricksatLuoyangRefrac-tories(Group)Co.,Ltd,(FormerLuoyangRefrac-toriesFactory).Throughtheimprovementandin-troducingtechnologyfromabroadthecompany'smanagementandqualitystandardonsilicabricksproductionhasreachedahigherlevel.Thephysicalandchemicalspecifications,aswellastheappear-anceofsilicabricksforcokeovens,hotblaststovesandglasskilnshavereachedtheadvancedinterna-tionallevel.NowthecompanyhasbecomeproducingbaseandmainexportingbasevariouskindsofsilicabricksinChina.

简介：ThedevelopmentandachievementofChinarefractoriesindustryforthepastdecadeshavebeenreviewed.ProblemsanddifficultiesfacingatpresentinChinaefractoriesindustryhavebeenpointedout.Opinionsaboutthefuturedevelopmenthavealsobeenstated.

简介：以邻苯二甲酸酐和乙二胺为原料,水为介质,先制得N,N’-乙撑双邻苯二甲酰亚胺;然后经溴代及老化处理合成白色阻燃剂N,N’-乙撑双四溴邻苯二甲酰亚胺。此新方法不采用任何有机溶剂和有机助剂,成本低,污染小,产品纯度高,外观洁白,全程总收率大于80%

简介：在标准生产方式中，双组分泡沫密封件要先完成注塑成型，然后将零部件冷却或暂时存放，之后才能涂装泡沫。这对注塑加工商来说既费时、费空间又费钱。对此，Sonderhoff开发了Mold＇nSeal工艺，该工艺通过将注塑与泡沫涂装的内联结合，使双组分泡沫密封件的生产更加节省时间、空间和成本。

简介：中海油南海某油田井下N80油管接箍普遍存在腐蚀穿孔现象。本文利用理化性能分析、失效部位的宏观和微观形貌分析、腐蚀产物的元素及成分分析、重演性实验，对该N80油管接箍处的穿孔失效机理进行了分析研究。结果表明，该N80油管接箍材料的化学成分、力学性能及微观结构均符合要求；管材失效部位为接箍内壁连接缝隙处；构件穿孔失效的主要原因是湍流腐蚀（湍流冲刷＋腐蚀），接箍内壁结构变化引起的湍流作用，在较高液体流速下造成流体冲刷严重，而高矿化度介质中的二氧化碳腐蚀是其失效的根本原因。

简介：ThemagnesiabasedcurablespecimenswithdifferentSi3N4contentswerecastedusingsinteredmagnesite(w(MgO)=95%)asstartingmaterial,SiO2micro-powderasbinder,0.3%,4%and5%β-Si3N4powderreplacingtheequaladditionofmagnesiapowderrespectively.Theslagresistancetestwascarriedoutat1550℃for3husingBaosteeltundishslagandstaticcruciblemethod.Theresultindicatesthat:introducingSi3N4couldobviouslyimprovetheslagresistanceofMgObasedcastable,whichincreasedwithincreasingSi3N4.DenseSiO2sinteredlayerformedonthesurfaceofmagnesiabasedcastablebecauseoftheoxidationofSi3N4addition,whichcanpreventthefurtherslagpenetration.Inthedeepinnerofcastable,thepartial-pressureofoxygenwasverylow,soSi3N4canexiststably.Meanwhileinreducingatmosphere,Si3N4washardtobesintered,whichresultedinthelooseinteriorstructureofMgObasedcastable.

简介：Thedistributionofrefractoryrawmaterialresources,itsthroughputcapacity,productvanetiesandqualityaswellasmarketsituationinChinawereinvestigated.

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简介：ForChina'srefractoriesindustry,thefirsttwodecadesinthenewcenturywouldbeaperiodofstructuraloptimizationwithreorganizationofrefractoriesenterprises,reconstructionofmanufacturingplantsandrestructuringofproductvarieties.Animportantstrategicmeasureshouldbetodevelophighqualitysyntheticrawmaterialsandhighperformancefunctionalproductsmainlybasedonourrichnaturalresourcestocopewithnewdemandsofadvancedhightemperaturetechnologies.

简介：Anewsandwichtesthasbeendevelopedtomeasuretheadherenceofcementclinkeronbasicrefractoriestotesttheircoatability,Statisticaldesingsofexperimentmethod-ologywereemployedforevaluationsofthesandwichtest.Threefractionalfactorialtestsandonefullfactorialtestwereexecutedtoefficientlygeneratedatathatrevealthesignificanceofthemajorfactorsandtheruggednesstotheminorfactors.Itsrepeatabilityandreproducibilityhavebeenstatisticallyconfirmedtobeacceptable,Evaluationsonvariousbasicbricksbythesandwichtestreflecttheircoatingperformanceinrotarykiln.

简介：Si3N4powderandhot-pressedSi3N4ceramicsaddedwithAl2O3areusedforinvestigatetheiroxidationbehviorinairandnitrogenatmosphere(withoxygenpartialpressurePO2=1-10Pa),TheoxidationproductsofSi3N4areexaminedbychemicalanalysi,X-raydiffraction(XRD)andXPSmethod,Also,thermodynamiccalculationismadetoanalyzeoxidationbehaviorofSi3N4.TheresultsshowthatonlypassiveoxidationwilloccurwhenSi3N4isoxidizedinairathightemperature,whereasinN2athightemperature,theactiveoxidationisdominantinspiteoftheexistenceofalittlepassiveoxidation.

简介：ThemechanicalpropertiesofpressurelesssinteringFe-Si3N4bondedSiCandSi3N4bondedSiCwithsamemanufactureprocesshavebeencomparedinthispaper.TheoxidizingmechanismofFe-Si3N4bondedSiCceramicmatrixcompositehasbeeninvestigatedespeciallythroughTG-DSC(thermogravimetricanalysis-differentialscanningcalorimeter)experiment.DuringoxidationprocedurethemainreactionistheoxidationofSiCandSi3N4,SiO2whichformprotectingfilmtopreventfurtheroxidizing.AndresidualironinthesamplesbecomeFe2O3andFe3O4,theoxidationkineticsat1100～1300℃ofre-Si3N4bondedSiChasbeenstudiedespecially.Theweightgainperunitareaatinitialstagechangesaccordingtobeelinerule,inthemiddleaccordingtoconic,andinthelastoxidationperiodfollowsparabolarule.

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简介：采用来自日本的全新配方，内含活性炭洁肤元素，优质的角鲨烷、夏威夷果仁及洋甘菊精华等多种成分。洁面时具有强力吸附毒素和杂质的功效，能像磁石般吸走毛孔内积聚的油脂与深层污垢。补充肌肤流失的水分，舒缓因缺水等引致的敏感不适。