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ID:36457798
大小:2.38 MB
页数:86页
时间:2019-05-10
《溶胶凝胶法制备NiZn铁氧体材料的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、山东大学硕士学位论文溶胶凝胶法制备NiZn铁氧体材料的研究姓名:成彬申请学位级别:硕士专业:凝聚态物理指导教师:胡季帆20080512山东大学硕士学位论文第五章是论文的结尾部分,主要对前述几章节进行了总结,并对溶胶凝胶法的应用前景进行了展望。关键词:NiZn铁氧体;溶胶凝胶法;磁导率;Q值;截止频率Ⅱ山东大学硕士学位论文-__l-_I_
2、I___●●——_i⋯im■IIl_ABSTRACTAsakindofimportantnonmetallicmagneticmaterials,ferritesareusedalotinou
3、rlife.Sincetheywerediscovered,peopledoextensivestudiesonthem.Thesynthesisofthepowderhasalwaysbeenthemainsubject.Besidesthetraditionalsynthesis,therearemanynewmethods,suchashydrothermalmethod,mieroemulsionmethodandco-precipitationmethod.Butbecauseofthedisadvantageoft
4、hesemethods,theyhavenotbeenappliedinindustry.Duringtheseyears,Withthedevelopmentoftheminiaturizationandlightnessofelectronicdevicesandtheelectro-magneticpropertiesofferritematerialsalealsoexpectedtosatisfythehighpermeability,highlimitedfrequency,widefrequencyrangean
5、dlowpowerloss,conventionalsynthesisCannotsatisfythedemandsofpeople.Nickel·Zincferriteswithspinelstructure(a8204)aleakindofpolynalymetaloxidesinteredmaterials.Theyhavebeenplayinganimportantroleintheapplicationofllighfrequencyfieldofmagneto-electronicdevicessincetheyw
6、erediscovered.Apartfromthesedemandsforpermeabilityandfrequency,moremustbedonetoimprovethetechnicsofproduction,especiallyonhowtoreducetheconsumptionofenergy.So,itisveryimportantforthesociety,especiallyforthedevelopmentofelectronicsandinformationindustrytostudyanddeve
7、lopanewmethodtoproducelli曲permeability,highlimitingfrequencyandwidefrequencyrangematerials丽mlowenergyconsumption.Thisthesiscontainsfivechapters.Themaincontentsare弱follows:Thefirstchaptermainlysummarizesthecurrentdevelopmentofsoftmagneticferritematerials,andgivesther
8、easonthatwhywechoosethesol—gelmethodtosynthesizetheNickel—Zincferrites.Thesecondchapteristheseedtime,generallypresentsthebasictheoryofferriteswithspinelstructure,includingtheoriginofmagnetism,thecrystalstructureofspinel·typeferrites,andsomeparametersofsoftmagneticma
9、terials.AtlastIII山东大学硕士学位论文enumeratesandanalyzessomefamiliarmethodsusedinferritepreparation.The缸rdchapterpresentsthemethodofpreparationand
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