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ID:33813610
大小:1.71 MB
页数:53页
时间:2019-03-01
《03型复合材料中组元性能对其压电性能影响的研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、ABSTRACT0-3piezo-compositescompriseceramicpowderandthree-dimensionalpolymer.Theyexhibitmanyadvantates,suchaslowbrittleness,lowdensityandlowpermittivity.Butthelowpiezoelectricityofcompositeslimitsitsapplication.Inordertoimprovepiezoelectricproperties,theceramicsandtheth
2、irdcomponentofcompositeswerestudied.ThetheoreticalDilutemodelWa3setup,andthepropertiesofcompositeswereanalyzed.Accordingtothismodel,somefactorsthataffectthecomposites’propertieswerefoundout,suchasthesize,permittivity,andpiezoelectricityofceramicpowder.nlepermittivityof
3、thecomponentsaffectsthedistributionofelectricfielddirectly.Incomposites,thecomponentsoflowpermittivitycouldproducehighelectricfield.Avalidwaytoenhanceelectricfieldinceramicparticlesistoreducethepermittivityofceramicortoimprovethatofpolymermatrix.Theperrnittivityofceram
4、icscouldbereducedbydopingsomeingredients.However,becauseofthelowpermittivityofpolymers,thethirddopantwasadded.Finally,thecompositeswithhighpiezoelectricconstantWCl'eobtained.Theshapeofceramicpowderisanotherimportantfactorthatinfluencespiezoelectricconstantofcomposites.
5、Simplyreducingtheparticlesizeofceramicpowderisuselesstoincreasepiezoelectricity.Throughmixingdifferentsizesofpowderuniformly,smallerparticlescouldfiIlintheinterspaceformedbybiggerparticles.Tlliswillimprovethepiezoelectricityof0-3compositesandthemaximalcontentofceramic.
6、Inthispaper,piezoelectricceramicswithlowpermittivityand0-3compositeswereprepared,meanwhiletheprocessweredetermined.Poly-anilinewaspreparedandaddedintocomposites舔themirddopant.AtlastthecompositesWerepolarizedatacertaintemperatureandelectricfield.n塘propertytestshowsthatt
7、hepiezoelectricityofcompositesisenhancedbyutilizingceramicpowderswitlllowpermittivityandgoodsizedistributionandproperadditionofPoly-aniline,Keywords:0-3composites,Piezoelectricconstant,Permittivity,Particlesize,PAn武汉理工大学硕士学位论文第一章绪论上世纪70年代以来,由于电子、通讯和控制等高科技含量行业的迅速崛起,人们对材
8、料的高性能、多功能、复合化等的需求越来越高,一种新材料——智能材料也因此受到了人们的青睐。智能材料能够感知环境变化,并通过自我判断和结果而实现指令和执行的新材料,具有类生物功能。目前,可作为智能材料系统中执行的材料主要有压电材料、磁致
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