简介:TheannualoutputofChina'srefractoriesin1949was74thousandtons,andwas29.11milliontonsin2007,whichwas65%oftheworldtotalrefractoriesoutput.TheexportofChina'srefractoryproductsandrawmaterialsin2008was6.18milliontons,whichwereexportedtohundredsofcountriesandregionsintheworld.Chinaisabigcountryinthefieldofrefractoriesproductionandrefractoriesexport,whichhasdevotedalottorelativehightemperatureindustry.
简介:Inrecentyears,Chinahasfullydevelopedinoutput,quality,andtechnicaladvancementofrefractories,andbecomethebiggestcountryinrefractoriesproductionandconsumptionintheworld.Meanwhile,educationandtraininginChina'srefractoriesindustryhavedevelopedrapidly.Thispaperintroducesthepresentsituationsofundergraduateeducation,postgraduateeducation,academiceducation,andvocationalandothertrainingofChina'srefractoriesindustry,includingthestudentrecruitingsituation,subjectarrangement,teachersforce,andR&Dequipmentlevel,andalsoputsforwardsomesuggestionsforChina'srefractorieseducationandtraining.
简介:Chinahaslongbeenrecognisedasanimportantsourceofrefractoryrawmaterialsforrefractorymarketsworldwide.Bauxite,magnesia,fusedalumina,andrefractoryclaysinparticular,havemaintainedChina'sstrongpositionastheworld'sleadingsupplieroftheseminerals.However,importantchangeshavetakenplaceirthestructureofChineseandglobalsupplyoftheseminerals.Moreover,theworldrefractorymarketandthemineralstradingsectorhavealsoundergonearadicaltransformationthathasinfluencedmineralsupply,andshiftedendproductmanufacturetoChina.ThispaperhighlightsthesechangesandseeshowtheyhaveimpactedonChinaasaworldsourceofrefractoryminerals.
简介:Hexagonplate-likeAl8B4C7powdersweresuccessfullysynthesizedusingamixtureofdiborontrioxide,activatedcarbonandaluminumoraluminabyacarbothermalreductionprocess.TheeffectofAlsourceandstartingmaterialsadditionsonsynthesisofAl8B4C7wasinvestigated.ThephasecompositionandmicrostructureofAl8B4C7powderwerecharacterizedbymeansofXRD,SEMandEDS.ThemainphasecompositionsoftheproductssynthesizedfromAl,B2O3andactivatedcarbonareAl8B4C7andAl2OC.Al2O3canreplaceAltosynthesizeAl8B4C7.Al8B4C7grainssynthesizedfromAl2O3,B2O3andactivatedcarbonarehexagonplate-likeandhaveathicknessof10μmandasizeofabout100μm.
简介:Theroleofnano-SiO2andultra-fineboroncarbideonthepropertiesofalumina-graphitematerialswasinvestigated.Thestudyshowedthattheultra-fineboroncarbideaddedmodifiedthemicrostructureofresidualcarbonandpromotedthechemicalbondbetweenresidualcarbonfromphenolicresinandflakegraphite.Thecarbonwhitecouldstrengthentheresidualcarbonfromphenolicresin.ThesetwoadditivesimprovedthemechanicalpropertiesofAGrefractoriesatbothroomtemperatureandhightemperature,andthermalshockresistancewasimprovednoticeably.Whenthetwoadditivesweredopedtogether,carbonwhitecouldretardtheevaporationofB2O3.Thermalshockresistancewasguaranteedwithasmalleramountofultrafineboroncarbide.