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1、摘要鍶鐵氧體由于其較強(qiáng)的各向異性和適中的磁化強(qiáng)度使其成為重要的磁性材料,廣泛應(yīng)用于高密度磁記錄、高性能永磁體、微波材料、微波吸收材料等領(lǐng)域。因此,鍶鐵氧體作為一種重要的永磁材料將會(huì)宥非常廣闊的應(yīng)用前景。本研究主要采用共沉淀法合成鍶鐵氧體樣品。以FCC12、SrCl2、NaOH、聚乙二醇等做為原料制作,再將液體樣品進(jìn)行抽濾、干燥,再經(jīng)過(guò)馬弗爐煅燒得到樣品。最盾著重研究鐵鍶比、堿比和煅燒溫度等因素對(duì)粒子的微觀結(jié)構(gòu)與性能的影響。利用高壓透射電子顯微鏡(TEM)、振動(dòng)磁強(qiáng)計(jì)(VSM)X射線衍射儀(XRD)和掃描電子顯微鏡(SEM)等先進(jìn)儀器對(duì)樣品粒子的粒徑,分散性,磁性及晶相進(jìn)行表征并討
2、論,最£;得出最佳的鐵鍶比和其他實(shí)驗(yàn)條件組合。關(guān)鍵字:鍶鐵氧體;共沉淀法合成;鐵鍶比;磁性TheStrontiumHexaferriteSynthesizedbyCo-precipitationMethodAbstractHexagonalferritesSrFeuOwarewidelyutilisedaspermanentmagnetsformicrowavedevices,high-densitymagneticrecordingandbubbledomainmemories.Thisisduetotheirrelativelystronganisotropyandmoder
3、atedmagnetization.Therefore,Sr-ferrite,asapermanentmagnetmaterialwillbeimportanttohaveaverybroadprospects.Theco-precipitationmethodwasappliedforthepreparationofSrFeuOwinthispaper.ChemicallygradeFeCh,SrCh,NaOH,Polyvinylalcoholwereusedasstartingmaterials.Thenliquidthesamples,dry,andthenaftermuf
4、flefurnaceCalcinergetsamples.FinallyfocusingonFe3l/Sr2tmoleratio,NaOHdosages,calcinedtemperaturesandotherfactorsonthemicro-particlestructureandpropertiesoftheimpact.Thenthestructure,magneticandotherbehaviorofnanosizedparticlewerestudiedbyusingadvancedinstrumentsofTEM,XRD,VSMandSEM,thebetterSr
5、-ferriteparticlecanbeobtained.Keywords:Sr-ferrite;Co-precipitationsynthesis;Fe3+/Sr2moleratio;magnetic摘.S......................................................................................................................IAbstract.............................................................
6、............................................................................II1弓IW.........................................................................................................................................11.1納米材料..................................................................
7、................................................................11.1納米材料概念...............................................................................................................11.1.2納米材料的發(fā)展............................................