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1、Chapter7Chapter7ElectrostaticSprayElectrostaticSprayDepositionTechniqueforThinFilmsDepositionTechniqueforThinFilmsFabricationFabricationChunhuaChenDepartmentofMaterialsScienceandEngineeringUniversityofScienceandTechnologyofChinaDepartmentofMaterialsSciencea
2、ndEngineeringApplyingMaterialsInnovationtoEnergyandEnvironmentalProblems...VariousspraysBernoulli'stheoremUniversityofScienceandTechnologyofChinaDepartmentofMaterialsScienceandEngineeringMechanicalspraying液珠破碎條件表面張力＜氣動力4σf表面張力δ=d02ρvaa氣動力q=2如果δ=q，則：2ρvdaa0=
3、8σ氣動力fUniversityofScienceandTechnologyofChina表面張力DepartmentofMaterialsScienceandEngineeringMechanicalspraying2ρvdaa0定義=Weσf實驗中發(fā)現(xiàn)：韋伯準則數(shù)8＜We＜10.7：液珠只發(fā)生變形而不破碎，10.7＜We＜14：液珠開始破碎We≥14：全部液珠破碎成細小的霧珠，We，平均直徑愈小UniversityofScienceandTechnologyofChina直流式噴嘴離心噴嘴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
