SCHOTT BOROFLOAT 33 - University of Chicago

1 SCHOTTBOROFLOAT 33 The versatilefloatedborosilicateglass-with aninfinitenumberof applicationsESCHOTTBOROFLOAT 332,Summary3 FloatedBorosilicateGlassfromSCHOTT5 ProductDescription6 FormsSupplied12 TechnicalProperties12 MechanicalProperties12 ThermalProperties17 ChemicalProperties19 OpticalProperties28 ElectricalProperties30 Fitting30 Cleaning3 SCHOTTBOROFLOAT 33 FloatedBorosilicateGlassfromSCHOTTBOROFL OAT 33 is ahigh qualityboro-silicateglasswith outstandingpropertiesfor awide-rangeof uniquespecialfloat glassis ma-nufacturedby SCHOTTT echnicalGlassSolutionsGmbHusingthe Microfloatprocessand the resultsin ahomoge-neousmaterialthat has an excellentmirror-likesurface.

2 Ahigh degreeof flat-ness and an 33 is aclear and transpar-ent excellenttrans-missionand its very weakfluorescenceintensitiesover the entirelight spectrummakeBOROFLOAT 33 idealfor awiderangeof applicationsin optics,opto-electronics,photonicsand low thermalexpansion,its highthermalshockresistanceand its abilityto withstandtemperaturesup to 450 Cfor long periodsmakeBOROFLOAT 33agood choicefor applicationswhichcall for goodtemperaturestability( pyrolyticself-cleaningovensand over platesfor high-powerfloodlights). BOROFLOAT 33 is highlyresistanttoattackby water,strongacids,alkalisaswell as particularlysuitablefor applicationsinthe chemicalindustrysuch as sightglas-ses for reactionvesselsand of applicationis in medicaland hardlyinfluencedbythe glassreceptaclebecausethe expo-sure to waterand acidsresultsonly inthe leachingout of smallamountsofions fromthe 33 has alowerdensitythan sodalime float makesitpossibleto constructlightweightlamina-ted glasssystems( ).

3 BOROFLOAT 33 has proven itself inmanytraditional applications and,today,there is an increasingareaofusage innew and technically sophisticatedspecialglass applications suchasbiotechnology,microelectronicsand Applicationof BOROFLOAT 33,Its specialphysicaland chemicalpropertiesmakeBOROFLOAT 33 atrulyversatileperformerwith abroad rangeof uses: Home Appliances(interiorovendoors,fittingsin microwaveappliances,windowpanelsfor fireplaces) Environmentalengineering,chemicalindustr y(resistantliningsand sightglassesfor reactionvessels,microfluidicsystems) Lighting(protectivepanelsfor spotlightsand high-powerfloodlights) Photovoltaics(glassfor solarcollectors) Precisionengineering,optics(opticalfilte rsand mirrorsetc.)

4 Medicaltechnology,biotechnology(slides,b iochips,titrationplates,DNAsequencers,mi crofluidicsystems) Semiconductorengineering,electronics,sen sors(wafers,displayglass) Safety(bulletproofglazing)The qualityof BOROFLOAT 33 is ensuredby our qualityassurancesystemaccordingto the requirementsof the DIN ISO 33 is aborosilicateglasstype as specifiedin the internation-al standardISO 3585and EN 1748T1. BOROFLOAT 33 productsmeetmostinternationalstandards,f or examplethe German,British,Americanand structuralcharacteristicsand the material spuritygrade(low contentofpolyvalentions)of BOROFLOAT 33 resultsin an overallhigh transmissionof ultraviolet,visibleand its low alkalicontent, BOROFLOAT 33 worksas agood to its high boroncontent, BOROFLOAT 33 can be usedas aneutronabsorberglassin 33 is environmentallyfriendlyand madeof naturalraw materi-als.

5 The glasscan be recycledseveraltimesand disposedof %SiO281 %6 FormsSuppliedPanelThicknessPanelthicknes sis tolerancesaresuppliedon request., ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( ) BOROFLOAT 33 is offeredin the followingthicknessesand tolerances,in mm (in.):7 FormsSuppliedSizesJProcessingand FinishingJWe will be happyto for stocksizes700x575 mm2(28 ) for stocksizes3000x2300 mm2( )[for to 9mm( in.)]

6 Thickness]StandardSizesThickness1150x850 mm2( ) mm( )1700x1300 mm2( ) mm( )2300x1700 mm2( ) mm( )Our BOROFLOAT 33 productrangeis complementedby awide varietyofprocessingand finishingpossibilities: Cutting(includingwaterjet and laser) Edgefinish(arrissed,bevelled,groundor polishededges)andcornerfinish(dubbedor roundedcorners) Drilling(includingultrasonic) Printing, Subsurfacelaser engraving8 Processing, :The standardedgefinishfor cut-to-sizepanelsisRK2 followingDIN 1249T11, see prEN13024 1, (groundand polished)on standardcornerworkingis also be suppliedonrequestwith :Roundededge,flat-arrissed(RK2) : BOROFLOAT 33 can be cut to size withinthe cut-to-sizesheetswill be suppliedon : BOROFLOAT 33 can be suppliedwith boreholesas 33 can be suppliedwith boreholesof 2mmand 33 with cut-outson the positionof boreholesin relationto the edgesand cor-ners of the sheetand also to eachotherare generallydependenton.

7 The nominalthicknessof the glass (d), the sheetdimensions(B, H), the diameterof the hole ( ) the shapeof followinglimitationson the positionof holesapplyto sheetswith amaximumof four the sheethas adifferenthole configuration,otherlimitationsmay The distanceabetweenthe edgeof the hole and the edgeof the glassshouldnot be less than the thicknessof the dProcessingJ2. The distancebbetweenthe edgesof the variousholesshouldalso notbe less d103. Dependingon the positionof the holesin relationto the cornerof theglassit is possiblefor the distanceto the two sidesedgesto be Permittedboreholepositiondeviation:Devia tionof boreholecenter: compositematerialscan be usedto vary the specificproper-ties of BOROFLOAT to matchthe requirementsof increasesits functionality: BOROFLOAT MwithreflectivecoatingThe applicationof appropriateinterferencelayers( )resultsin the part of the radiationof visiblelight responsiblefor the reflec-tion beingsemireflectedparticularlywell (reflectionwanted).

8 Due to appliancecomponentslocatedbehindthe glasscanbe this natureare to be foundin ARwithanti-reflectivecoatingThe applicationof appropriateinterferencelayersresultsin the part ofthe radiationresponsiblefor the reflectionbeingreduced(reflectionandmirr oreffectlargelyprevented).Thereare applicationsfor BOROFLOAT AR everywherewhereaglass is requiredwithoutany 33 is suppliedin the mm thicknessand1150x850 mm sheetsize. We will be happyto provideinformationaboutotherthicknessand sizes plus :The resistanceof BOROFLOAT 33 to thermaland mechanicalloadsisimprovedby possiblein the to15 maximumsheetsize is 3000x1800 mm and the minimumedgelengthis 300 will be happyto provideinformationaboutthicknessand sizes at any time on will be happyto providedetailedinformationon valuesbeloware generallyapplicablebasicdata for BOROFLOAT guidefiguresaccordingto DIN 55350 ,they also applyto the coatedversions( BOROFLOAT AR andBOROFLOAT M) exceptfor the transmissiondata (see OpticalProperties,pages19 ff).

9 TechnicalPropertiesDensity(25 C) g/cm3 Young sModulus 64 kN/mm2(to DIN 13316)Poisson sRatio (to DIN 13316) (to ISO 9385)Bendingstrength 25 MPa(to DIN 52292 T1)ImpactresistanceThe impactresistanceof BOROFLOAT 33dependson the way it is fitted,the size andthicknessof the panel,the type of impactinvoled,presenceof drill holesand theirarrangementas well as LinearThermal (20 300 C) x10 6K 1 Expansion( )(to ISO 7991)SpecificHeatCapacitycp(20 100 C) KJ x(kg xK) 1 ThermalConductivity (90 C) Wx(mxK) 113 ThermalProperties l/l in 10-6 Temperature[ C]annealedglass0100200300400500600700050 01000150020002500 Temperature[ C]-500-400-300-200-1000100200300400 l/l in 10-6-200-180-160-140-120-100-80-60-40020 406080100-20 BOROFLOAT 33 ThermalExpansionJBOROFLOAT 33 Behaviorin the CryogenicTemperatureRangeJ14 BOROFLOAT 33 SpecificHeatCapacity(cp),ThermalProperti escp[KJ x(kg xK)-1]Temperature[ C] 33 ThermalConductivity( ),Temperature[ C] [W x(mxK)-1] RTS valuecharacterizesthe abilityof aglass panelto.

10 Platesof approximately20 x20cm2(8 )are heatedinan ovenwith recirculatedair and then dousedin the centerwith 50 ml( oz.) of roomtemperaturewater,at which 5%ofthe platesare abradedbeforeheatingwith 220 grit sandpaperto ThermalGradients(RTG)JResistanceto ThermalShock(RTS)TmaxFor short-termusage<10h500 CFor long-termusage 10 h450 CGlassThicknessRTS mm175 mm160 mm150 K> mm125 KThe maximumtemperaturesin use indicatedapplyonly if the followingRTGand RTS valuesare observedat the RTG valuecharacterizesthe abilityof aglass type to withstandaspecifictemperaturedifferenceb etweenthe hotcenterand the cold edgesof.