玻璃包覆非晶磁性微絲的制備與電磁特性研究.pdf

1、華中科技大學(xué)碩士學(xué)位論文玻璃包覆非晶磁性微絲的制備與電磁特性研究姓名：吳挺華申請(qǐng)學(xué)位級(jí)別：碩士專(zhuān)業(yè)：微電子學(xué)與固體電子學(xué)指導(dǎo)教師：江建軍20060924IIABSTRACTWiththewidespreaduseofmicrowaveinthefieldsuchasmilitarycivilapplicationmicrowaveabsbingmaterialshavebeenreceivedconsiderableattention.

2、Highperfmanceabsbersareimptanttoacquiretheexcellentmicrowaveabsbingmaterials.Inthispaperaftersummarizingtherelevantliteraturescomparedtoothercustomisotropicabsbingmaterialsonenewanisotropicmaterialsamphousglasscoatedmicr

3、owireswhichhavetheadvantageofphysicalperfmanceabsbingperfmancealsobecompatiblewiththemicrowaveabsbingmaterialstructuralacteristicisputfwardasourresearch.Theapparatusfabricationprocessthecaseofthespinningmethodhavebeenill

4、uminatedinthispaper.Theeffectofsynthesisconditionsonthemicrowireswasdiscussed.ThemicrostructureofthemicrowireswasanalyzedbyXraydiffraction(XRD)scanningelectronmicroscope(SEM).Themagostaticparametersofthemicrowiressamples

5、befeafterbeingannealedweremeasuredbyVibratingSampleMagometer(VSM).MicrowaveelectromagicparametersofthesemicrowiresweremeasuredbyMicrowaveVectwkAnalyzer.TheresultshowthattheglasscoverofamouphousglasscoveredFerichmicrowire

6、saresymmetricalthediameterrangingfromm10tom30theyhavethebetterelectromagicparametersduringtherangeofGHz18~2.Reflectioncoefficientofonelayerabsber(mm1thick)wasnmericallycalculated.Theresultsshowthatthesemicrowirescouldbeu

7、sedfmicrowaveabsbersoperatingintheseveralGHzrange.AtlastthemagicpropertiesoftheamouphousglasscoveredFerichmicrowireswereinvestigatedusingthemicromagicmethodinthispaper.Thecomplexpermeabilitywithdifferentmagocrystallinean

8、isotropyweresimulatedthecalculatedspindistributionweregiven.Thefeasibilityofmagicpropertiessimulationbymicromagicmethodwasdiscussedintheetically.Keywds:Glasscoveredmicrowiresamphousmaterialsmicromagicmethodcomplexpermeab