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Nb2O5-TiO2 System Ceramics

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Nb2O5-TiO2 System Ceramics

    Nb2O5-TiO2 System Ceramics

    JiangZL,ChenXY,BaiFM,eta1.Textureof nanocompositeNd2Fel4B/ctFemeltspunribbonslJj. JoumalofRareEarths,2004,22(2):227. SkomskiR,CoeyJMD.Giantenergyproductin nanostructuredtwophasemagnetsJ].Phys.Rev.B,

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    nanocompositeRR(Fe,Co,Nb)86B6(R=Nd,Pr)mag

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    EffectofLa?.SronMicrowaveDielectric

CaO-MgO-Nb2O5-TiO2SystemCeramics

    WangHaoH,ChenWen,TianZhongqing(J.InstituteofMaterialsScienceandEngineering, h^0nUniversityofTechnology,WuhanDD7D,China;2.InstituteofMaterialsScienceand Engineering.ChongqinCollegeofTechnology,ChongqingDDD5D,China) Abstract:TheeffectofLa,SF2onthemicrostrucLa,Sr2dopedCaOMgONb2O5

    TiO2systemceram

    tureandmicrowavepropertiesofCaOMgONb2O5

    icrespectivelymaintainorthorhombictype.Itisfound

    TiO,systemceramicswasinvestigated.TheresultthatLa"improvesthemicrowavepropertiesofCaO

    showsthatasinglecomplexperovskitestructureMgONb2O5

    TiO2ceramic,butSr2doesnot.Themi

    formedwithininvestigatedcompositionrangeinLa,crowavepropertiesofLa3,Sr2

    dopedCaOMgO

    Sr2dopedCaOMgONb2O5

    TiO2systemceramics.Nb205-TiO2systemceramicsdependonthedegreeof WithincreasingofLa?,Sr2content,thestructureofoctahedraldistortioninsidematerials. Keywords:inorganicnonmetallicmaterials;perovskite;microwavedielectricceramics;dielectricproperties;rareearths

    (SeeJ.Chin.RE.Soc.(inChin.),2006,24(1):52forfulltext)

    ********************

    HydrogenInducedStructuralandMagneticTransformationsinHoCu2 WangDong,ZhangZheyu,ZhangHu,LongYi,YeRongchang,ChangYongqin(Schoolof MaterialsScienceandEngineering,UniversityofScienceandTechnologyBeijing,Beijing100083,

    China)

    Abstract:Thestructureandmagneticpropertiesof

    HoCu2compoundafterhydrogenationwereinvestigat

    ed.TheresultsshowthatcrystallinehydrideHo.

    Cu2H,latticedistortedhydridesandamixtureofthe

twohydridescanbeobtainedbyhydrogenation.Ho

    Cu2Hremainthesalnestructureasthematrix.Ho

    Cu2H3【?arrivesthemaximalhydrogencontent,ac

    companiedonlyby2.27%latticeexpansion,andits Keywords:hydrogenation;HoCu2compound;magneticproperties; magneticpropertiesalmostremainconstantcompared tothematrix.Latticedistortedhydrideisamixture consistedoflatticedistortedHoH2andCu.Themag- neticresultsshowthatlatticedistortedhydridessample 4andthemixtureofcrystallinehydrideandlatticedis

    tortedhydridehaveamagneticorderingstructureat5 K,butthemagneticphasetransitionswerenotob- servedwhenthetemperaturedroppedto5K.

    rareearths

    (SeeJ.Chin.RE.Soc.(inChin.),2006,24(1):61forfulltext) 1J

    1J1J1J

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