静电喷雾沉积

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1、Chapter7Chapter7ElectrostaticSprayElectrostaticSprayDepositionTechniqueforThinFilmsDepositionTechniqueforThinFilmsFabricationFabricationChunhuaChenDepartmentofMaterialsScienceandEngineeringUniversityofScienceandTechnologyofChinaDepartmentofMaterialsSciencea

2、ndEngineeringApplyingMaterialsInnovationtoEnergyandEnvironmentalProblems...VariousspraysBernoulli'stheoremUniversityofScienceandTechnologyofChinaDepartmentofMaterialsScienceandEngineeringMechanicalspraying液珠破碎条件表面张力＜气动力4σf表面张力δ=d02ρvaa气动力q=2如果δ=q，则：2ρvdaa0=

3、8σ气动力fUniversityofScienceandTechnologyofChina表面张力DepartmentofMaterialsScienceandEngineeringMechanicalspraying2ρvdaa0定义=Weσf实验中发现：韦伯准则数8＜We＜10.7：液珠只发生变形而不破碎，10.7＜We＜14：液珠开始破碎We≥14：全部液珠破碎成细小的雾珠，We，平均直径愈小UniversityofScienceandTechnologyofChina直流式喷嘴离心喷嘴Departme

4、ntofMaterialsScienceandEngineeringUltrasonicsprayingUniversityofScienceandTechnologyofChinaDepartmentofMaterialsScienceandEngineeringApplicationsofelectrostaticsprayingòAgriculturalandautomotivespraysòTargeteddrugdeliverysystemsòSpacevehiclepropulsionunitsò

5、LiquidmetalsprayersòIonsourcesòEmulsifiersòDustscavengingsystemsòInk-jetprintersUniversityofScienceandTechnologyofChinaDepartmentofMaterialsScienceandEngineeringModesofelectrostaticsprayingUniversityofScienceandTechnologyofChinaDepartmentofMaterialsSciencea

6、ndEngineeringDrippingmode2)μ=68mPaS3)ethanolTheapplicationofDCvoltagecauses:(1)ariseinemissionfrequency;(2)reductionindropsize.M.Cloupeauetal.,J.AerosolSci.25(1994)UniversityofScienceandTechnologyofChina1021-1036.癸二酸二乙酯DepartmentofMaterials1)μ=7mPaSSciencea

7、ndEngineeringMicrodripping,spindel,simple-jetmodesthresholdVSpindle(1cycle)UniversityofScienceandTechnologyofChinaSimple-jet(a,b,c),ramifiedjet(d,e),randomspraying(f).DepartmentofMaterialsScienceandEngineeringQ=4mm3/sVUniversityo

8、fScienceandTechnologyofChinabaDepartmentofMaterialsScienceandEngineeringMulti-jetmodesCf.http://cobweb.ecn.purdue.edu/~heister/sam.htmlUniversityofScienceandTechnologyofChinaDepartmentofMaterialsScienc