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1、(0)7pages©(0)TransTechPublications,SwitzerlandEffectsofMonoclinicZrO2withDifferentParticleSizeonPropertiesofZirconiaRefractories1,a1,b1,c1,dHonggangSun,ShuangzhiYan,PengtaoLi,QinghuaTanandAijun1,eWu1StateKeyLaboratoryofAdvancedRefractories，SinosteelLuoyangInstituteofRefractoriesResearchCo.,
2、Ltd.，Luoyang471039,ChinaPR.abcdsunhonggang79@gmail.com,yanshuangzhi@163.com,lipt@lirrc.com，mengfeitqh@163.com,ewuaijun8301@126.comKeywords:monocliniczirconia;particlesize;zirconiarefractories;microstructure;poresizedistribution.Abstract.Thezirconiarefractorieswerepreparedusingpartiallystabi
3、lizedzirconiagrainandmonocliniczirconiapowderasthematrix,partiallystabilizedzirconiaparticlesastheaggregate,andphenolicresinasthebinder,andfoursizesofmonocliniczirconiapowder(D50=1μm,3μm,6μm,10μm)wereusedasadditives.Besides,animprovedspecimenwaspreparedusingaspecificmonocliniczirconiapowder
4、asadditive.Propertiesofspecimenswithdifferentsizesofm-ZrO2powderswereresearched,includingapparentporosity,bulkdensity,coldmodulusofrupture,poresizedistribution.Moreover,phasecompositionandmicrostructurewereanalyzed.Theresultsshowthat,particlesizeofmonocliniczirconiapowdersgreatlyaffectthesi
5、nteringofmaterials.Thespecimenswithfinerm-ZrO2powderhavelowerporosity,higherbulkdensityandcoldmodulusofrupture,andthegrainboundariesofzirconiaparticleswerefuzzy,showingthatthematrixofthespecimenswerealmostsinteredcompletely.Whileinspecimensusingcoarserm-ZrO2powder,thegrainboundariesofzircon
6、iaparticleswereclear,showingthatthematrixofthespecimenswerenotsinteredcompletely..Thoughfinermonocliniczirconiapowderpromotedthesinteringofmaterialsinthetest,ithadnegativeimpactonthemicroporusstructure,forlargeporeswereobservedinthespecimenwithfinem-ZrO2powder.Finally,theimprovedspecimenwit
7、hpromotedsinteringandoptimizedmicrostructureaswellasphasecompositionwasobtainedbyusingspecificmonocliniczirconiapowderasadditive.IntroductionZirconiaisakindofwell-knownoxideceramicmaterialusedforrefractorymaterials.Zirconiarefractorieshavemanyadvantages,
