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ID:38240681
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时间:2019-05-29
《共沉淀法制备的锶铁氧体磁粉的结构、形貌及磁性能(1)》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、万方数据·42·材料导报B:研究篇2012年5月(下)第26卷第5期Structure,MorphologyandMagneticPropertyofSr-ferritePowderSynthesizedbytheCo-precipitationRouteZHANGXian,MAYongqing,WUDandan,MAQian,ZANFenlian,ZHENGGanhong,WUMingzai,LIGuang(AnhuiKeyLaboratoryofInformationMaterialsandDevices,SchoolofPhysicsan
2、dMaterialsScience,AnhuiUniversity,Hefei230039)AbstractM-typeSr-ferritepowderwithFe3+toSr2+of10:1moleratiowassynthesizedbytheehemiealco-precipitation-calcinationroute.Thesamplesweresinteredatdifferenttemperaturesfrom800℃tol100℃inordertoinvestigatetheeffectsofsinteringtemperat
3、ureonthecrystalstructure。grainsize。morphologyandmagneticproperties.Thepowderswerecharacterizedbyinfraredspectra,powderX-raysdiffraction,.scanningelectronmicroscopyandvibratingsamplemagnetometer.Powderssinteredat1000℃showthebesthomogeneityintermsofsizeandmo-rphology,andposse戤
4、sthehighestsaturationmagnetizationof77.87emu/g.Powderssinteredatl100℃haveasphefi—calshapeandshowthelowestcoercivityof16010e.TheresultsalsoshowthatawiderangeofcoercivityvaryingfromlfiOlOeto45910ecouldbeobtainedbyselectingtheappropriatecalcinationtemperature.KeywordsM—typeSrfe
5、rrite,co-precipitation,nanoparticle,magneticproperty共沉淀法制备的锶铁氧体磁粉的结构、形貌及磁性能‘张贤,马永青,吴丹丹,马倩,昝芬莲,郑赣鸿,吴明在,李广(安徽大学物理与材料科学学院,安徽省信息材料与器件重点实验摩,合肥230039)摘要采用共沉淀法按照n(Fe):n(Sr);10;1合成M型锶铁氧体。通过把样品在不同的温度下退火,研完了退火温度对晶体结构、形貌和磁性能的影响。所制备的样品用FTlR、XR『)、sEM和VSM进行表征。结果表明,当退必温度为i000℃时样品颗粒分布规则且比饱和
6、磁化强度迭最大值,为77.87emu/g。当退欠温度为1100℃时样品颗粒变成球形且矫顽力最小.为16010e。此外,通过控制退火温度可使矫顽力在1601~45910e范围内变化。关键词M型锶铁氧体共沉淀法纳米颗粒磁性能中图分类号:TM277文献标识码:AM-typehexagonalferritessuchasstrontiumandbariumferrite(SrorBa)FelzOl9wereintensivelyinvestigatedinthepastdecadesbecausetheyhaverelativelylargesatur
7、ationmagnetization,highintrinsiccoercivity.andhighmagneticanisotropyfield,excellentchemicalstabilityaswellasIowcoatcomparedwithrare-earthcompounds,whichareconsi-derablyimportanttotheelectricalandmagneticproductssuchaspermanentmagnets,high-densitymagnetic.rrmgne—to-opticrecor
8、dingmedia,andmicrowavefiltersI-1.2].FortheSrhexagonalferrite.itpossessesthe
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