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Overviewofreactionsinteringpowder:Theprocessofreactionsinteringisasfollows:firstly,α-SiCpowderismixedwithsilicapowderGraphitepowderismixedinproportionandmadebydrypressing,extrusionorgroutingPorousgreenbody.TheCinthegreenbodyisincontactwithliquidSiathightemperatureTheinfiltratedSireactstoformβ-SiC,andcombineswithα-SiCtoformβ-SiCTheresultsshowthattheamountofSiisfilledinthepores,andthereactionsinteredbodywithoutporesiscompact.ReactionsinteredSiCusuallycontains8%freeSi.Therefore,inordertoensurecompleteSiinfiltration,theblankshouldhaveenoughporosity.Generally,thepropergreendensitycanbeobtainedbyadjustingthecontentofα-SiCandCintheinitialmixture,theparticlesizedistributionofα-SiC,theshapeandparticlesizeofCandtheformingpressure.TheF240andf1200reactionsinteringspecialsiliconcarbidepowderproducedbythecompanyismainlyusedinthefieldofreactionsinteringsiliconcarbideproducts,withtheadvantagesofhighpurity,goodparticleshape,strongfluidityandreasonableparticlesizedistribution.Maintechnicalspecifications:NameproductSpecificationandgranularityAppearancecolorPurity(%)Iron(%)Carbon(%)ReactionsinteringmicropowderF240F1200Puregreen≥99≤0.02≤0.01OtherspecificationscanbecustomizedaccordingtouserrequirementsMainusesofreactionsinteringpowder:Reactionsinteredsiliconcarbidehastheadvantagesofhighthermalconductivity,lowcoefficientofthermalexpansion,highstrength,netsizesintering(nochangeinsizebeforeandaftersintering)andeasypreparationoflargecomplexshapeproducts.Itscostisfarlowerthanthatofhotpressedandpressurelesssinteredsiliconcarbide.Itisakindofengineeringceramicmaterialwithwideapplicationprospect.Ithasbeenwidelyusedinmechanicalsealhightemperaturevalves,heatexchangersandslidingjointsabroadBearing,etc.ThedifferencebetweenreactionsinteringandpressurelesssinteringisasfollowsReactionsinteringsiliconcarbidepowderandpressurelesssinteringsiliconcarbidepowderaretwokindsofsinteringprocessofsiliconcarbideproducts.Duetothedifferentsinteringprocess,theperformanceoftheproductsarealsodifferent,mainlyinthepressurelesssinteringsiliconcarbidematerialtechnicalparametersandreactionsinteringsiliconcarbidematerialtechnicalparameters.Thefiringprocessisdifferent.Reactivesinteringistomakefreesiliconpenetrateintosiliconcarbideatalowertemperature.Pressurelesssinteringisasiliconcarbideproductthatshrinksnaturallyat2100℃.Thetechnicalparametersofsinteredproductsaredifferent.Thevolumedensity,hardnessandcompressivestrengthofthereactionaredifferentfromthoseofpressurelessSiCproducts.Theproductperformanceisdifferent.ReactionsinteringproductsandpressurelessproductsindifferentpH,temperatureandothercircumstances,theusetimeisdifferent.