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1、本科毕业设计(论文)玻璃微珠改性及导电性能的研究学院专业年级班别学号学生姓名指导教师玻璃微珠改性及导电性能的研究摘要玻璃微珠有实心、空心、多孔玻璃微珠之分,泛指直径在数微米至数百微米范围内的玻璃(或陶瓷)球体。主要成分是Si02、AI2O3、Fe2()3等,外观呈白色或灰白色。因具有质轻、导热低、滚动性好、强度高、化学稳定性好、价格低廉、来源广泛、无毒性等优点使其功能得以被广泛开发。口前,对玻璃微珠改性研究的方法有表而包覆改性,表面化学反应改性,高能表面改性,表面沸石化及化学镀法等众多先进方法。尤其是化学镀方法不断研究
2、改进。改性的玻璃微珠有效地应用于在合成材料,涂料,医学,建筑,炸的,导电材料等众多领域。尤其是金属化的导电玻璃微珠,在电磁屏蔽、微波吸收等方面发挥十分重要的作用。改性玻璃微珠尤其是在导电功能方面,已成为当前研究的热点。本实验综合众多玻璃微珠化学镀改性的方法,对空心玻璃微珠进行碱洗、粗化、敏化、活化的预处理,用银氨溶液和葡萄糖对其表面进行镀银。并对预处理每个步骤都进行优化,并利用正交试验对镀银过程的条件进行最优化。并通过万能电用表对其进行压实电阻检测,得出最优方案:预处理每个步骤进行的时间均为lOmin,粗化剂用10g/
3、L过硫酸钱水溶液,敏化剂SnCl2溶液定为20g/L,活化时AgNO3浓度为10g/Lo镀银过程屮条件确定为:温度常温(25°C),反应时间为lh,葡萄糖浓度为15g/L,PH值为12o最优方案得出的实验成品压实电阻检测为0.1Q。关键词:玻璃微珠,改性,化学镀,导电AbstractGlassbeadsarecrystal(orceramic)ballwhichdiameterintherangeofseveralmicronstoseveralhundredmicrons,areclassifiedintosolid
4、,hollow,porousglassbeads.ThemaincomponentsofSiO?、AI2O3、Fe2()3,etc.Theyappearwhiteorgray.Theyareendowedwithmanygreatcharacteristics,suchaslightweight,lowthermalconductivity,goodrollingperformance,highstrength,goodchemicalstability,lowprice,widesource,non-toxic,re
5、sultsinitsfunctionarcbeingdevelopedwidely.Atpresent,therearcmanyadvancedstudymethodsofglassbeadsmodifiedsurfacesuchascoatingmodification,surfacechemicalmodificationthighenergysurfacemodificationandsurfaceofzeolitesandchemicalplating.Themethodofchemicalplatingmak
6、eimprovementconstantly.Modificationofglassbeadsareeffectivelyappliedtothesyntheticmaterials,paint,medicine,architecture,explosives,conductivematerialandsoon.Especiallymetallizedconductiveglassbeadsplayaveryimportantroleintheareaofelectromagneticshieldingandmicro
7、waveabsorption.Therefore,modifiedglassbeadshavewideapplicationdevelopmentvalue,especiallyintheareaofconductivefunction.Thisstudybasedonmanyglassbeadsmodifiedelectrolessplatingmethods.Prctrcatmcntprogramforhollowglassbeadsarcalkalinecleaning,coarsening,sensitizat
8、ion,activation.Andsilverplatingwithsilverammoniasolutionandglucose.OptimizethepretreatmentbysinglefactorexperimentbuttheelectrolessplatingbyTheoptimalis10min,concentr