利用溶膠凝膠法制備電子封裝用硅微粉的研究.pdf

1、桂林理工大學碩士學位論文利用溶膠凝膠法制備電子封裝用硅微粉的研究姓名：彭放申請學位級別：碩士專業(yè)：材料科學與工程指導教師：蔣述興201204桂林理工大學碩士學位論文AbstractSilicapowderisakindofhighqualityinorganicfillerwidelyusedinplastics，paint，rubberelectronicsubstrateandelectronicpacking，highgradeq

2、uartzglass，andotherhightechproductsindustryPackagingmaterialsofsemiconductordevicerequiredextensiveuseofepoxymoldingcompound，highpurityultrafinesilicapowderisthemainfillerLargescale，verylargescaleintegrationpackagingmate

3、rialsontherequirementsofincreasinglymghnotonlythehighpuritysuperfinepowderfillers，onthemorphologyofparticlesalsohashigherrequirementsSphericalparticleshavemanyadvantages，forexample，sphericalsilicapowderwithbetterhighdiel

4、ectricconstant，hie#moistureresistance，highheatresistance，highfillercontent，lowfactorofexpansion，lowstress，lowfrictioncoefficient，lowimpuritiesandSOonItwillbewidelyappliedinmanyfieldssuchastheelectrical，theelectronic，andt

5、hechemical；therefore，itenjoysgreatmarketpotentialandobviouseconomicefficiencyBasedontheabovebackgroundinordertoimprovethepurityoflawmaterialsforpreparationofsodiumsilicateasfaraspossible，theselectionofsilicadioxidecomemo

6、fmorethan99％ofthequartzasrawmaterial，throughthemagneticseparation，acidtreatmentanddifferentprocessingtechnologytoexploretheoptimumpurificationprocessconditionsandparameters，andthepurificationprocessareanalyzedanddiscusse

7、dinavarietyofinfluencingfactors，usingGB／T14565—1993andothermethodstestthesilicacontent，experimentalresultsshowthat：theuseofveinquartzofrawmaterialsforpreparingpowderusingprocessingtechnologyarecoarsecrushing，roughgrindin

8、g，fmegrinding，magneticseparationpickling，waterwashing，dryingandSOoncontrolthefillingquantityofmillball，rotationalspeedofballmill，allkindsofacidwithdifferentprocessparameters，callbepreparedsilicaofllighpuritylowimpurities

9、ofquartzpowderIntheacidtreatmentprocess，thepurificationeffectofusingmixedacidisbetterthanusingsingleacid，thepurificationeffectofmixedaciddubbedbyhydrochloricacidandoxalicacidisbetterthantheonedubbedbyotheracidThenwebenef

10、iciateandpurifyveinquartzwhichisthelaWmaterialtogethighpurequartspowderthenmakeitreact、析tIlsodiumcarbonateunderhightemperaturetoproducesolidsodiumsilicatewhichbedissolvedunderhighpressuretoproducewaterglassAndweadjustthe

11、modulusofwaterglass，thenwemaketheprocessedwaterglassreactwithacid，dryandcalcinetheresultanttoproducesphericalsilicaandthroughchangingthemodulusofsodiumsilicate，theconcentrationofsodiumsilicateandaddingmixeddispersantwean