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简介：1ScopeThisstandardspecifiestheclassification,technicalrequirements,testmethods,qualityappraisalprocedure,packing,marking,transportation,storageand

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简介：Thereactionofsillimanitewithaluminaattemperatures1650℃an1750℃hasbeeninvestigated.Theresultshaveshownthat,inthelaboratorytestconditions,thehigherthealuminacontent,thelowerwillbetheamountsofglass-phseofthefiredbodyandthehigherwillbetheformationofmullite.Inthepresenttests,however,thereactioninconcernhasnotbeencompleted,thereactioninconcernhasnotbeencompleted.Someuncombinedresidualaluminastillexistintheformofcorundum.

简介：从通过热、机械的方法对待的低等级白陶土(K-JS)的氧化铝恢复被调查。高等级白陶土(K-SX)被用作比较。为K-JS和K-SX的最佳锻烧温度两个都是600吗？？

简介：Calciumhexaluminate(CA6)wassynthesizedbymixinglight-weightcalciumcarbonateandAl2O3micropowder(calcinedα-Al2O3,activatedα-Al2O3orρ-Al2O3)accordingtothestoichimetricratioofCA6,andreactionsinteringat1200,1300,1400and1500℃for3h,respectively.Effectsofthethreealuminamicropowdersonthephasecomposition,microstructureandpropertiesofCA6wereinvestigated.Theresultsshowthat:(1)forthethreeAl2O3micropowders,thereactiontogenerateCA6inspecimensbasicallycompletesatabout1500℃;CA6generatedinallspecimensisplanar,butthearraymodesareslightlydifferent;(2)thespecimenspreparedfromcalcinedα-Al2O3orρ-Al2O3shrinkalmost,whilethespecimenspreparedfromactivatedα-Al2O3expand;(3)thecoldcrushingstrengthofthespecimenpreparedfromactivatedα-Al2O3isthehighest,reaching42.5MPawhenonlyCA6exists(afterfiringat1500℃);(4)thespecimenpreparedfromρ-Al2O3hasthelowestgenerationtemperatureofCA6andthehighestapparentporosity,reaching70.1%whenonlyCA6exists(afterfiringat1500℃);(5)thespecimenpreparedfromcalcinedα-Al2O3hasthebiggestbulkdensity.

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简介：Thedevelopmentandapplicationofdomesticspinelandhigh-alumian/spinel(includingcorun-dum/spinelandcalcined-bauxite/spinel)castablesweredisucssedinthispaper,Itexpoundedthetech-nicalcharactersandvirtuesofhighgradeandmedi-umgradespinelandtheimportanceofthedevelop-metandsuccessfulapplicationofcalcined-bauxite/spinelcastalbes.Becauseofthetechnicalandeco-nomicalfeasibility,thedevelopementandapplicationofspinelandhigh-alumina/spinelcastables,inwhichdomesticrefractoryworkersplayanimportantrole,havebeenflurishing.

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简介：Thegrain-growthbehaviorofAl2O3powdercompactswithsmallcontents(<5wt%)ofvariousdopantswasstudied.Theexistenceoftabularsub-grainswereobservedwithallthefollowingdopants:V2O5,MgO+Y2O3andNa2B4O7+V2O3+Pr.Thetabularsubgrainsaredefinedastheabnormalgrainslongerthan30μmwithanaspectratio>50.Theycanbeobservedwhenthesinteringtemperaturearehigherthan1850℃。

简介：Thereproducingalumina-magnesia-carbonbrickswerepreparedwiththedumpedbricksasstartingmaterials.Thebulkdensity,apparentporosity,crushingstrength,modolusofruptureandslagresistanceofthespecimenwereanalyzed.Theresultsshowthattheusedrefractoriescanbereusedandrecycledbytherightmethod.Thereproducingalumina-magnesia-carbonbrickswithbetterabilitieswereprepared.

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简介：1ScopeThisstandardspecifiesthesort,technicalrequirement,testmethod,inspectionrules,marking,packing,transportation,storageandqualitycertificationofhighaluminarefractorybricksforelectricarcfurnaceroofs.

简介：Inthiswork,therheologicalbehaviorofultra-lowcementalumina-basedcastableswithadditionofflakegraphiteandextrudedgraphitepelletshasbeeninvestigatedbyusingIBBrheometer.Emphasishasbeenlaidontheinfluenceofthetypeandamountofcarbonadditiononrheologicalpropertiesofthealumina-basedcastablesandtheresultsarecomparedwithcorrespondingaluminacastablesampleswithoutanycarbonaddition.Itisfoundthatalumina-basedcastableswithextrudedgraphitepelletshavegoodrheologicalbehaviorandflowabilitywithlowerwaterdemand(＜6.3%)andnosegregationduringtheshearingofcastable.

简介：Withtherapiddevelopmentofcomputertechnique,Computeraideddesign(CAD)andcomputeraidedmanufacturing(CAM)orcomputerintegratedmanufacturing(CIM)hasbecameanalternativetotheconventionaltechniqueforproducingdentalrestorations.

简介：ThefracturetoughnessandfractureworkofAl2O3/SiCprismaticceramiccompositeswasevaluatedinthispaper,whichshowedthefractureenergywasimprovedgreatly.Basedontheobservationforcrackpropagationandfracturemorphology,thefracturebehavioroftheprismaticcompositeswasanalyzed.Inthebendingtest,thecompositesdisplayedanon-catastrophicbehaviorandagracefulfailurewithreasonableload-carryingcapability.

简介：Theeffectsofseveralcommercialdispersants,includingAN-2000,ammoniumpolyacrylate,sodiumtripolyphosphate,sodiumhexametaphosphate,andofsolidsloadingandofelectro-fusedmagnesiaonrheologicalpropertiesofaqueousalumina-spinelslurrieswerestudied.TheresultsrevealthatAN-2000isthemosteffectiveoneamongtheselecteddispersantsforalumina-spinelslurries.With0.5%weightofAN-2000,the57vol%solidsloadobtainedatshearrateof50s-1.

简介：Aluminamagnesiacastablecruciblespecimenswerepreparedusingtabularcorundum(≤5mm),fusedmagnesiapowder(≤0.088mm),fusedspinelpowder(≤0.044mm),andα-Al2O3micropowder(d50≤0.7μm)asmainstartingmaterials,batching,mixing,shaping,anddrying.Slagresistancewasdeterminedbystaticcruciblemethodat1600℃for3hadoptingtwoladleslagswithdifferentbasicities(3.40and1.03).Thecorrosionandpenetrationindexesandmicrostructurecharacteristicsofthespecimensafterslagresistancetestwereanalyzedtostudythecorrosionbehaviorsofthetwoslagstoaluminamagnesiacastables.Theresultsshowthatthecorrosionofthelowbasicityslagtoaluminamagnesiacastablesismuchmoreseriousthanthatofthehighbasicityslagforthattheirreactionswithcastablesformdifferentproducts;forthelowbasicityslag,themulti-phasecoexistenceofCA6andcompoundsofCaO-Al2O3-SiO2inthematerialstogetherwithvolumeexpansioncausedbytheformationofCA6intensifytheslagcorrosionandpenetration;forthehighbasicityslag,thereactionbetweenslagandcastablesgeneratesaCA2denselayerandalargeamountofin-situMAintheinterface,reducingtheslagcorrosiontothematerialseffectively.

简介：在电子横梁照耀下面暴露的蠕虫状的alpha氧化铝重建的表面被一台扫描电子显微镜分别地在房间温度和90K与0.5keV横梁精力并且由一台发射度电子显微镜调查。在原处记录的结果证明重建的现在的electron-beam-induced表面是电子剂量和温度依赖者并且由体积形状变化伴随了。表面重建被一个钻腐烂过程，在表面，作文坚定被在艾尔2O3和由从体积的使放出的氧的铝的氧化。

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