納米復(fù)合材料外文翻譯翻譯英文幫助外文翻譯英文翻譯復(fù)合材料

浙江師范大學(xué)生化學(xué)院本科畢業(yè)設(shè)計論文外文翻譯譯文1FEFE3BY2O3納米復(fù)合材料在千兆赫范圍內(nèi)的電磁微波吸收性能劉九榮A、伊藤正博A、KENICHIMACHIDAAA大阪大學(xué)尖端科學(xué)技術(shù)合作研究中心吹田市,大阪5650871,日本接到于2003年2月24日，2003年9月8日錄用摘要FEFE3BY2O3納米復(fù)合材料采用熔體紡技術(shù)研發(fā)，其電磁微波吸收性能在0052005GHZ范圍內(nèi)。與FE/Y2O3復(fù)合物相比，F(xiàn)EFE3BY2O3的共振頻率轉(zhuǎn)移到一個較高的頻率范圍，這歸因于四方FE3B的大各向異性場HA（04MA/M）。其相對介電常數(shù)（）RRJ一直在低于0510GHZ的地區(qū)，這表明復(fù)合粉體具有高電阻率（）。含質(zhì)量分?jǐn)?shù)10M80，厚度63MM的FEFE3BY2O3粉末的樹脂復(fù)合材料分別在2765GHZ頻率范圍內(nèi)獲得有效的電磁微波吸收（反射損耗99）中制備BA3CO18FE236CR06O41。通過在乙烷中將BA3CO18FE236CR06O41（20DB）。值在0118GHZ范圍R隨著頻率迅速從54減少到05。此外，值也隨著頻率從15減少到03，其01R18GHZ內(nèi)沒有呈現(xiàn)鐵磁共振峰（圖2），雖然，相對介電常數(shù)（）在RRJ218GHZ范圍保持幾乎不變（17，15）。但是，F(xiàn)E/BA3CO18FE236CR06O41RR樹脂復(fù)合材料的一個鐵磁共振峰在418GHZ范圍被觀察到（圖2（C）。早期的結(jié)果表明，在BA3CO18FE236CR06O41添加FE粉末形成納米復(fù)合材料對減少渦流損耗具有顯著影響?？傊ㄟ^將FE和BA3CO18FE236CR06O41進(jìn)行球磨，已經(jīng)分別制備了FE/BA3CO18FE236CR06O41（38，70或85VOLFE）納米復(fù)合材料，其中BA3CO18FE236CR06O41具有磁體和絕緣體壓制的渦流損耗的雙重作用。FE/BA3CO18FE236CR06O41納米復(fù)合材料具有比FE和BA3CO18FE236CR06O41更高的HC值。與鐵氧體相比，含70或85VOLFE的FE/BA3CO18FE236CR06O41納米復(fù)合材料有希望在較低頻率范圍生產(chǎn)更薄、更輕的電磁波吸收材料。這項(xiàng)工作得到了日本教育、科學(xué)、體育、文化部門和從2003年的新能源和工業(yè)技術(shù)發(fā)展組織的研究獎助金的支持（NEDO）?？ㄌ?5205025原文1ELECTROMAGNETICWAVEABSORPTIONPROPERTIESOFAFE/FE3B/Y2O3NANOCOMPOSITESINGIGAHERTZRANGEJIURONGLIU,MASAHIROITOH,ANDKENICHIMACHIDAAACOLLABORATIVERESEARCHCENTERFORADVANCEDSCIENCEANDTECHNOLOGYOSAKAUNIVERSITY,21YAMADAOKA,SUITA,OSAKA5650871,JAPANRECEIVED24FEBRUARY2003ACCEPTED8SEPTEMBER2003ABSTRACTNANOCOMPOSITESAFE/FE3B/Y2O3WEREPREPAREDBYAMELTSPUNTECHNIQUE,ANDTHEELECTROMAGNETICWAVEABSORPTIONPROPERTIESWEREMEASUREDINTHE0052005GHZRANGECOMPAREDWITHAFE/Y2O3COMPOSITES,THERESONANCEFREQUENCYFROFAFE/FE3B/Y2O3SHIFTEDTOAHIGHERFREQUENCYRANGEDUETOTHELARGEANISOTROPYELDHAOFTETRAGONALFE3B04MA/MTHERELATIVEPERMITTIVITYWASCONSTANTLYLOWOVERTHE0510GHZREGION,WHICHRRJINDICATESTHATTHECOMPOSITEPOWDERSHAVEAHIGHRESISTIVITYTHEEFFECTIVE10MELECTROMAGNETICWAVEABSORPTIONREECTIONLOSS999INPURITYBYMEANSOFINDUCTIONMELTINGINARAMORPHOUSY5FE775B175ALLOYRIBBONSWITH15MMINWIDTHANDABOUT30MMINTHICKNESSWEREPREPAREDBYTHESINGLEROLLERMELTSPUNAPPARATUSATAROLLSURFACEVELOCITYOF20M/SUSINGTHEEARLIERINGOTSASTHESTARTINGMATERIALSAFTERBALLMILLING,THEPOWDERSWITHPARTICLESIZESOF24MWEREHEATEDTO953KINHEWITHAHEATINGRATEOF40K/MINFOR10MINSUBSEQUENTHEATINGAT573KFOR2HINO2STREAMGAVETHERESULTANTPOWDERSWHICHWERECHARACTERIZEDBYXRAYDIFFRACTIONXRDTHEMICROSTRUCTURESWEREOBSERVEDONAHIGHRESOLUTIONSCANNINGELECTRONMICROSCOPEHITACHIS50003RESULTSANDDISCUSSION31STRUCTURECHARACTERISTICSEPOXYRESINCOMPOSITESWEREPREPAREDBYHOMOGENEOUSLYMIXINGTHECOMPOSITEPOWDERSWITH20WTEPOXYRESINANDPRESSINGINTOCYLINDRICALSHAPEDCOMPACTSTHESECOMPACTSWERECUREDBYHEATINGAT453KFOR30MIN,ANDTHENCUTINTOTOROIDALSHAPEDSAMPLESOF700MMOUTERDIAMETERAND304MMINNERDIAMETERTHESCATTERINGPARAMETERSS11,S21OFTHETOROIDALSHAPEDSAMPLEWEREMEASUREDUSINGAHEWLETTPACKARD8720BNETWORKANALYZERTHERELATIVEPERMEABILITYRANDPERMITTIVITYRVALUESWEREDETERMINEDFROMTHESCATTERINGPARAMETERSASMEASUREDINTHEFREQUENCYRANGEOF0052005GHZTHEREECTIONLOSSRLCURVESWERECALCULATEDFROMTHERELATIVEPERMEABILITYANDPERMITTIVITYATGIVENFREQUENCYANDABSORBERTHICKNESSWITHTHEFOLLOWINGEQUATIONS21/21/20TANH/INRRZJFDC300LOG|IIRLZWHEREFISTHEFREQUENCYOFTHEELECTROMAGNETICWAVE,DISTHETHICKNESSOFANABSORBER,CISTHEVELOCITYOFLIGHT,Z0ISTHEIMPEDANCEOFAIR,ANDZINISTHEINPUTIMPEDANCEOFABSORBERFIG1THEXRDPATTERNOFY5FE775B175POWDERS（A）ASOBTAINED,（B）AFTERANNEALINGAT953KFOR10MININHEGAS,AND（C）OXIDATIONDISPROPORTIONATINGTHESAMPLE（B）INO2AT573KFOR2HFIGURE1SHOWSTHETYPICALXRAYDIFFRACTIONPATTERNSMEASUREDONTHEAMORPHOUSY5FE775B175POWDERAASOBTAINED,（B）AFTERANNEALINGAT953KFOR10MININHE,AND（C）AFTEROXIDATIONDISPROPORTIONATINGSAMPLE（B）AT573KFOR2HINO2FROMFIG1（A）,ITWASFOUNDTHATTHEY5FE775B175ALLOYPOWDERSPREPAREDBYUSINGTHEMELTSPUNTECHNIQUEWEREAMORPHOUSAFTERANNEALINGASSHOWNINFIG1（B）,THEPOWDERSWERECOMPOSEDOFBOTHTHEFE3BANDY2FE14BPHASESAFTEROXIDATIONDISPROPORTIONATION,THEPHASEOFY2FE14BDISAPPEAREDCOMPARINGTHEXRDPATTERNINFIG1（B）WITHTHATOFFIG1（C）,WESEETHATTHEINTENSITYFORTHEMAINPEAKOFFE3B（2445）,WHICHISJUSTAMAINPEAKOFAFE（110）,ISMUCHSTRONGERAFTEROXIDATIONTHISRESULTINDICATESTHATAFEISFORMEDBECAUSEOFTHEOXIDATIONOFY2FE14BINTOAFE,FE3BANDY2O3NANOPARTICLESBUTNOPEAKOFY2O3WASOBSERVEDFIG1CTHEREASONCOULDBETHATTHEY2O3PARTICLESIZEWASTOOSMALLTOBEDETECTEDTHEGRAINSIZESOFFE3BANDAFE,ABOUT30NM,WEREDETERMINEDFROMTHELINEBROADENINGOFTHEXRDPEAKSUSINGTHESCHERRERSFORMULATHISMEASUREMENTAGREESWITHTHEOBSERVATIONRESULTSBYHIGHRESOLUTIONSCANNINGELECTRONMICROSCOPY32MICROWAVEPROPERTIESTHEFREQUENCYDEPENDENCEONTHERELATIVEPERMITTIVITYFORRESINCOMPOSITES,INCLUDING80WTAFE/FE3B/Y2O3POWDERS,ISSHOWNINFIG2ATHEREALPARTRANDIMAGINARYPARTOFRELATIVEPERMITTIVITYWEREALMOSTCONSTANTOVERTHE0510RGHZRANGE,ANDHENCETHERELATIVEPERMITTIVITYSHOWEDALMOSTCONSTANTRRJ15，06THISNDINGINDICATESHIGHRESISTIVITYOFTHECOMPOSITESTHERRMEASUREDRESISTIVITYVALUEWASAROUND100MFORTHEAFE/FE3B/Y2O3COMPOSITES,BUTTHEELECTRICRESISTIVITYOFTHEND2FE14BCOMPOUNDWASREPORTEDAS14106M9THEHIGHRESISTIVITYOFTHENANOCOMPOSITESISASCRIBEDTOTHEPOWDERSCONSTITUENTSFE3B,AFE,ANDY2O3NANOPARTICLESEMBEDDEDAMONGFE3BANDAFEPARTICLES,Y2O3PLAYSAROLEASTHEINSULATORTHEREALPARTANDIMAGINARYPARTOFRELATIVEPERMEABILITYAREPLOTTEDASARRFUNCTIONOFFREQUENCYINFIG2BTHEREALPARTOFRELATIVEPERMEABILITYDECLINEDRFROM16TO09WITHFREQUENCYHOWEVER,THEIMAGINARYPARTOFRELATIVEPERMEABILITYINCREASEDFROM01TO06OVERARANGEOF171GHZ,ANDTHENDECREASEDINTHERHIGHERFREQUENCYRANGETHEIMAGINARYPARTOFRELATIVEPERMEABILITYEXHIBITEDAPEAKINABROADFREQUENCYRANGE29GHZCOMPAREDWITHAFE/Y2O3,THEAFE/FE3B/Y2O3COMPOSITESSHOWEDLOWERVALUESINBOTHTHEREALANDIMAGINARYRPARTSOFPERMEABILITYASSHOWNINFIG2BTHESELOWERVALUESAREDUETOTHERSMALLERMAGNETIZATIONOFFE3BTHANAFETHEREFORE,AFE/FE3B/Y2O3HASASMALLERRELATIVEPERMEABILITYTHANAFE/Y2O3BECAUSEOFTHECOOPERATIVEEFFECTOFAFEANDFE3BHOWEVER,THEMAXIMUMPOINTOFCURVEFORTHEAFE/FE3B/Y2O3COMPOSITESRSHIFTEDTOTHEHIGHERFREQUENCYVALUE71GHZASARESULT,THENANOCOMPOSITEPOWDERSPOSSESSAREMARKABLEFEATUREFORELECTROMAGNETICWAVEABSORPTIONINTHEHIGHERFREQUENCYREGIONFIG2FREQUENCYDEPENDENCESOFRELATIVEPERMITTIVITYRAANDPERMEABILITYRBFORTHERESINCOMPOSITESWITH80WTOFAFE/Y2O3ANDAFE/FE3B/Y2O3POWDERS33ABSORPTIONPERFORMANCEFIGURE3ASHOWSATYPICALRELATIONSHIPBETWEENRLANDFREQUENCYFORTHERESINCOMPOSITESWITH80WTAFE/FE3B/Y2O3POWDERSFIRST,THEMINIMUMREECTIONLOSSWASFOUNDTOMOVETOWARDTHELOWERFREQUENCYREGIONWITHINCREASINGTHETHICKNESSSECOND,THERLVALUESOFRESINCOMPOSITESLESSTHAN20DBWEREOBTAINEDINTHE2765GHZFREQUENCYRANGE,WITHTHICKNESSOF63MM,RESPECTIVELYINPARTICULAR,AMINIMUMRLVALUEOF33DBWASOBSERVEDAT45GHZONASPECIMENWITHAMATCHINGTHICKNESSDMOF4MM,ANDTHEMINIMUMDMVALUEOF3MMWASOBTAINEDAT65GHZRL27DBITISWELLKNOWNTHATONECRITERIONFORSELECTINGASUITABLEELECTROMAGNETICABSORPTIONMATERIALISTHELOCATIONOFITSNATURALRESONANCEFREQUENCYFRTHENATURALRESONANCEFREQUENCYISRELATEDTOTHEANISOTROPICELDHAVALUEBYTHEFOLLOWINGEQUATION42RAFHWHEREISTHEGYROMETRICRATIOANDHAISTHEANISOTROPICELDMANYWORKERSHAVEREPORTEDTHATTHELARGEHAVALUESOFTHEMTYPEFERRITESUSEDASELECTROMAGNETICWAVEABSORPTIONMATERIALSRESULTINAREMARKABLESHIFTTOHIGHFREQUENCYRANGEINFR1012THEREFORE,ONECANEXPECTTHATTHEFREQUENCYOFMICROWAVEABSORPTIONFORTHEMETALLICMAGNETSCANBECONTROLLEDBYCHANGINGTHEFRVALUEOFMATERIALSFIGURE3BSHOWSTHEFREQUENCYDEPENDENCEOFRL,FORRESINCOMPOSITESWITH80WTAFE/Y2O3POWDERSTHERLVALUEOFTHERESINCOMPOSITESLESSTHAN20DBWASOBTAINEDINAFREQUENCYRANGEOF2035GHZTHEELECTROMAGNETICWAVEABSORPTIONPROPERTIESOFAFE/SMO,AFE/Y2O3,ANDAFE/FE3B/Y2O3RESINCOMPOSITESPREPAREDUNDERTHEOPTIMIZEDCONDITIONSARESUMMARIZEDINTABLEIACOMPARISONOFTHESAMPLEAFE/FE3B/Y2O3WITHAFE/Y2O3SHOWSTHEMINIMUMREECTIONPOINTHASSHIFTEDTOAHIGHERFREQUENCY,FROM26TO45GHZTHISSHIFTISATTRIBUTEDTOTHEPARTIALREPLACEMENTOFCUBICAFEBYTETRAGONALFE3B,WHICHRESULTSINTHEINCREASEOFNATURALRESONANCEFREQUENCYFIG2BINAFE/FE3B/Y2O3NANOCOMPOSITES,AFEANDFE3BEXISTSIMULTANEOUSLYASMAGNETSCOMPAREDWITHAFE16GHZ,FE3BHASLARGERNATURALRESONANCEFREQUENCY14GHZASCALCULATEDFROMEQ4,WHICHISDUETOTHELARGEANISOTROPYELD04MA/M13BECAUSEOFTHEIRCOOPERATIVEEFFECT,THENATURALRESONANCEFREQUENCYFROFAFE/FE3B/Y2O3ISLOCATEDBETWEENTHATOFAFEANDFE3BHOWEVER,INTHE2735GHZRANGETHEMATCHINGTHICKNESSDMOFAFE/Y2O3ABSORBERSISTHINNERTHANAFE/FE3B/Y2O3FIG3BECAUSETHEVALUEOFAFE/Y2O3ISLARGERTHANTHATOFRAFE/FE3B/Y2O3INTHISFREQUENCYRANGEFORMAGNETICELECTROMAGNETICWAVEABSORPTIONMATERIALS,FM,WHENRL20DBCOMPAREDWITHFE/BA3CO18FE236CR06O41ONESTHEVALUERAPIDLYRDECLINEDWITHFREQUENCYFROM54TO05INTHE0118GHZFURTHERMORE,THERVALUEALSODECREASEDFROM15TO03WITHFREQUENCY,ANDNOFERROMAGNETICRESONANCEPEAKWASPRESENTINTHE0118GHZFIG2,ALTHOUGHTHERELATIVEPERMITTIVITYREMAINEDPRACTICALLYUNCHANGEDINTHE218GHZ（17RRJRAND15）BUTONEFERROMAGNETICRESONANCEPEAKCANBEOBSERVEDINTHE418GHZFORTHEFE/BA3CO18FE236CR06O41RESINCOMPOSITESFIG2CTHEEARLIERRESULTSINDICATEDTHATTHEBA3CO18FE236CR06O41ADDITIONINTOFEPOWDERSTOFORMNANOCOMPOSITESHASSIGNICANTEFFECTFORREDUCINGTHEEDDYCURRENTLOSSINCONCLUSION,FE/BA3CO18FE236CR06O4138,70,OR85VOLFENANOCOMPOSITESHAVEBEENPREPAREDBYBALLMILLINGFEWITHBA3CO18FE236CR06O41POWDERS,RESPECTIVELY,OFWHICHBA3CO18FE236CR06O41PLAYSTHEDOUBLEROLESASMAGNETANDINSULATORFORSUPPRESSINGTHEEDDYCURRENTLOSSFE/BA3CO18FE236CR06O41NANOCOMPOSITESSHOWEDHIGHERHCVALUESTHANFEANDBA3CO18FE236CR06O41COMPARINGWITHFERRITES,FE/BA3CO18FE236CR06O41NANOCOMPOSITESWITH70OR85VOLFEAREPROMISINGFORPRODUCINGTHINNERANDLIGHTEREMWAVEABSORBERSINLOWGHZRANGETHISWORKWASSUPPORTEDBYGRANTINAIDFORSCIENTICRESEARCHNO15205025FROMTHEMINISTRYOFEDUCATION,SCIENCE,SPORTS,ANDCULTUREOFJAPAN,ANDINDUSTRIALTECHNOLOGYRESEARCHGRANTPROGRAMIN2003FROMNEWENERGYANDINDUSTRIALTECHNOLOGYDEVELOPMENTORGANIZATIONNEDOOFJAPAN1YNAITOANDKSUETAKI,IEEETRANSMICROWAVETHEORYTECH19,65（1971）2SAOLIVER,MLCHEN,CVITTORIA,ANDPLU