硅料性质及处理流程

2007年7月PV行业知识培训SiliconMaterialWorkshopHK000M4I_Roadshow_1106Distill

SiO2+2C

Si+2CO↑ SiO2+SiC

Si+SiO+COPurification(Fractionation)Si+3HCl

SiH2Cl2+H2Si+3HCl

SiHCl3+H2DefinitionOfSiliconPhysicalProperty(Si)

1、Density：2330kg/m32、Rigidity：6.5

3、Meltingpoint:1414°CChemicProperty(Si)

Lithospherecontent:25.7%，Atomicweight:28.0855,

Electricconfiguration:[3s23p2],Valence:4。

Atnormaltemperature，reactionwithalkali、HF、FL,noreactionwithH2SO4、HCL、HNO3etc.ReactionEquation：Si+2NaOH+H2O=Na2SiO3+2H2↑〔AlkaliCleaning〕3Si+4HNO3+18HF=3H2SiF6+4NO↑+8H2O〔AcidCleaning〕SiliconClassifyingPot-scrap

〔importpot-scrap＆self-producedpot-scrap〕Re-meltmaterials〔importre-melt，self-producedside-plate，self-producedtops–and-tailsmaterial〕〔groovysliceandunconventionalslice)Slicematerial〔纯多晶，免洗多晶，铸锭多晶〕Poly-siliconmaterial片料预处理生产工艺流程目测分选非常规片电路板彩片型号测试铝铜片其他碱液浸泡双面重掺P型单面重掺端面重掺端面非重掺正常片P型N型混合型电导测试N型混合型合格品0.1-0.20.2-0.50.5-1.51.5-66

以上1-22-44-88以上重掺片碱洗处理合格品恒温烘干合格品分选包装浓水冲洗洁净漂洗纯水漂洗超声清洗纯水漂洗纯水漂洗分档标识沥水甩干纯水漂洗洁净漂洗重掺检测洁净分选称重封装质量检验分档标识质量检验仓库领料常规片入库报交合格品非常规片

重掺片喷砂处理入库处理分档标识盐酸漂洗二级漂洗不合格品返洗硅原料处理流程PrecleaningTypeselectingResistivityselectingImmersingAcidcleaningAlkalicleaningDryingPackingGrindingQuartzknockingsiliconSiliconpackedinbagSilicontreatmentflowPrecleaning1、Mainlyremovethevisibleoilandimpuritiesonthesurface.2、Reagentused:detergent,acetone.

1、Thetypesaredividedintofivebracket(N-type,P-type,)

2、Thewaytograspthebougie:

Typeselecting〔拿笔的手法〕〔型号分选仪〕1、Resistivitybracket〔1〕P型电阻率分为0.1-0.2Ω,0.2-0.5Ω,0.5-1.5Ω,1.5-6Ω,>6Ω,五档〔2〕N型和混合型电阻率分为1-2Ω,2-4Ω,4-8Ω,>8Ω四档〔3〕P型电阻率<0.1Ω和N型、混合型电阻率<1Ω列为重掺Resistivityclarifying使用的仪器及握探针的手法〔拿笔的手法〕〔电阻率仪〕1、穿好工作服,口罩，手套，平光眼镜，防止敲伤。2、去石英时尽量防止把原料敲碎。敲石英〔敲石英〕〔带石英的埚底料〕

1、穿好工作服，防酸手套，平光眼镜等防护用具。

2、把原料上面带有的杂质、石墨等磨去。Grinding〔Wayofgrinding〕〔Grindingmachine〕Immersing1、穿好防护用品2、把硅料倒入浸泡槽3、把酸倒入浸泡槽4、用胶带密封浸泡槽5、收集浸泡槽内的酸6、用水清洗硅料Acidcleaning1、穿好防护用品2、配置混合酸3、酸洗硅料4、一级冲洗硅料5、超声波清洗硅料6、二级冲洗硅料Alkalicleaning1、把片料倒入碱洗桶2、配碱洗液3、碱液反响沸腾4、一级清洗槽清洗5、盐酸浸泡6、纯水浸泡7、传递给烘干Drying

ReceivethematerialsfromImmersewithpurewaterConductivitytest

thetransferwindow

PutthematerialsintostainlessDrywithoven,Airingafterdrying.

steeldeliverytruck.

Packing

PullthematerialonMaterialselectingWeighingPlasticpacking

theselectingtable

PackingNotice：

Selecttheeligiblematerialsoutandputthemintotheeligibilitybag.

Selecttherejectedmaterialsoutandputthemintorewashbag.

Thepackedpolycrystallinesiliconshouldmarkclearly.

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