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《氧化共沉淀法制備MnZn鐵氧體及其稀土摻雜效應(yīng)研究》由會員上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學術(shù)論文-天天文庫。
1、南昌大學碩士學位論文氧化共沉淀法制備Mn-Zn鐵氧體及其稀土摻雜效應(yīng)研究姓名：姜貴文申請學位級別：碩士專業(yè)：材料物理與化學指導教師：羅廣圣20081201ABSTRA(玎ABSTRACTMn．Znferriteisakeymaterialofmodemelectronindustryandinformationindustry，widelyusedinswitchingpowersupplies，transformermagneticcores，informationmemorysystems，medica
2、ldiagnose，anti—electronmagneticinterferenceandSOon．Withtherapiddevelopmentoftelecommunicationandcomputertechnology，thehigherandhigherrequirementsareputforwardfortheMn·Znferrite·InordertOimprovethepropertiesofMn-Znferrite，researchesarefocusedonthefollowingt
3、hreeaspects：(1)adjustingtheproportionofthematerialcomposition，(2)theimprovementonpreparationmethod，(3)chemistrydopant．InthispaperthepreparationofMn．ZnferriteandtheeffectofRE-dopedonMn-ZnferritebyoxideCO-precipitationmethod．werestudiedInthispaperMn．Znferrit
4、enanometerpowderwassynthesizedinsolutiononthebasisofpreparationofFe304byoxideCO-precipitationmethod．Theeffectsofconcentrationofsolution，PHvalue，heat．treatmentandsurfactantwerestudiedonthephase，microstructureandmagneticpropertiesoftheMn—Znferritesamples．The
5、resultsindicatethesinglephaseMn-ZnferritenanometerpowdercanbeprepareddirectlybyoxideCO．precipitationmethod，andtheCOncentrationandPHvalueofsolutionaretwokeyfactorsofthemethod，andthehigherconcentrationandPHvalues，thehighercrystallinityandsaturationmagnetizat
6、ion．Fe203existsintheMn．Znferritesamplesaftertheyareheat—treatedatdifferenttemperaturesinairandthecontentofFe203reduceswiththerisingofheat—treatmenttemperature，whilethesaturationmagnetizationsincrease．ButFe203does’texistintheMn—Znferritesamplesaftertheyareh
7、eat．treatedat600℃inairandthencooledinnitrogenatmosphere．ThesaturationmagnetizationofMn-ZnferritesamplescooledinnitrogenatmosphereishigherthanthatofMn-Znferritesamplescooledinair．ThesurfactantCrABaddedtosolutioncanreduceagglomerationofthenanometerparticlese
8、fficiently，thecrystallitegranularityandsaturationmagnetizationdecreasewiththeincreasingoftheratioofthesurfactantandwaterweight．SecondlyMno．5．Zno．5RExFe2．x04(RE=Y、Nd、Gd、Dy)nanometerpowderwaspreparedbyoxideCO-p
