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从微观结构探讨Nb＿2O＿5含量对NiZnCu铁氧体电磁性能的影响.docx

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从微观结构探讨Nb＿2O＿5含量对NiZnCu铁氧体电磁性能的影响 摘要 本文通过分析NiZnCu铁氧体的微观结构，探讨了Nb2O5含量对其电磁性能的影响。研究结果表明，在一定范围内增加Nb2O5含量可以显著提高NiZnCu铁氧体的电磁性能，但是当含量过高时则会出现不利影响。因此，在实际应用中需要权衡Nb2O5含量与电磁性能的关系，以达到最佳效果。 关键词：微观结构，Nb2O5含量，NiZnCu铁氧体，电磁性能 Introduction NiZnCuferriteshavebeenwidelyusedinvariouselectronicdevicesduetotheirexcellentmagneticandelectricalproperties.However,theelectromagneticperformanceofNiZnCuferritesislimitedbytheirmicrostructure,whichaffectsthemagneticdomainstructureandthemagneticandelectricalproperties.Therefore,optimizingthemicrostructureofNiZnCuferritesisanimportantdirectionforimprovingtheirelectromagneticproperties. Nb2O5isacommondopantforferrites,andaddingNb2O5toNiZnCuferritescansignificantlyimprovetheirmagneticandelectricalproperties.However,theeffectofNb2O5contentonthemicrostructureandelectromagneticpropertiesofNiZnCuferriteshasnotbeensystematicallystudied.Inthispaper,weinvestigatedtheeffectofNb2O5contentonthemicrostructureandelectromagneticpropertiesofNiZnCuferrites,anddiscussedtherelationshipbetweenNb2O5contentandelectromagneticproperties. Experimentalprocedure NiZnCuferritesampleswithdifferentNb2O5contents(0.1-1.0wt.%)werepreparedbytheconventionalceramicprocess.TherawmaterialsNiO,ZnO,CuO,Fe2O3,andNb2O5wereweighedaccordingtothechemicalformulaofNiZnCuferrite,andthenmixedandgroundinaballmillfor24hours.Themixturewasthenpressedintopelletsandsinteredat1200°Cfor2hoursinair. TheXRDpatternsofthesamplesweremeasuredusingaRigakuD/Max-2500X-raydiffractometerwithCuKαradiation.Themicrostructureofthesampleswasobservedbyscanningelectronmicroscopy(SEM)andtransmissionelectronmicroscopy(TEM).Themagneticpropertiesofthesamplesweremeasuredusingavibratingsamplemagnetometer(VSM)atroomtemperature.TheelectricalpropertiesofthesamplesweremeasuredusingaLCRmeterat1kHz. Resultsanddiscussion XRDanalysisshowedthatallthesamplesexhibitedsingle-phasespinelstructure,andnoimpurityphasesweredetected.ThelatticeparameterincreasedwithincreasingNb2O5content,indicatingthatNb2O5waseffectivelyincorporatedintotheferritela