简介：Carbothermalreductionandnitridation(CRN)ofzircon(ZrSiO4)permitsobtainingdifferentcompositesofoxidesandnitridessuchasZrO2-Si2N2OandZrN-Si3N4.Theeffectsoftechnologicalparameters(carbonsource,reactiontemperature,andcarboncontent)onthereactionrateandproductphasecompositionofCRNofzirconwereinvestigatedbyTGAandXRD.Theresultsshowthat:(1)carbonsourceisanimportantfactorforarapidreaction,andactivatedcarbonischosenasthecarbonsourceconsideringtheexpectproductsandreactionrate;(2)reactiontemperaturehasvitaleffectonreactionrateandproduct.Incaseofcarboncontentabove20%,thezirconphaseandm-ZrO2phasedecreasewithincreasingtemperature,whiletheZr7N8O4phaseincreasesfirstlyandthendecreases,andtheZrNphaseincreasescontinually;(3)differentcarboncontentsresultindifferentreactionproducts.Thehigherthecarboncontent,thelowerthestartingtemperaturefortheCRNofzircon.

简介：Thereductionofcarbon/aluminapowdermixtureinaflowingnitrogenstreamwasinve-tigatedbythequantitiativeanalysisofX-raydiffraction.Experimentalresultsindicatedthatthereactionratecouldbeincreasedbyincreasingthenitrogenflowrate,ortreatingtemperature,Theratewasalsofoundtobeincreasedbydecreasingthealuminaparticlesizeandinitialbulkdensity,Andthecalcinedaluminawassup-posedtobethesuitablesourceofaluminumox-idecomparedwiththeothertypesofalumina.ThefinalpowderproductofAlNwasobservedbySEMandanalyzedbyaprticle-sizeanalyzer.

简介：Inthispaper,theinflucnceofchiefprocessparametersontheontinuousproductionofSi3N4powderbyrenitridationhasbeenstudied,Thesutiableprocessparametershavebeenfound,andhighqualitySi3N4powderhasbeendeveloped.

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