TECHNICAL DATA ALON™ OPTICAL CERAMIC - …

1 For Quotations Contact:Surmet Corporation33 B StreetBurlington, MA 781-272-3969 phone781-272-4521 faxTECHNICAL data ALON OPTICAL CERAMICALONTMO ptical Ceramicis an extremely durablecrystalline material with excellent opticaltransparency in the near ultraviolet, visible andinfrared up to approximately 5Pm Ceramicis fabricated using a proprietary powder processing technique. Thematerial combines mechanical and OPTICAL propertiessimilar to sapphire with the advantages of an isotropic cubic crystal structure. It has anapproximate composition of Ceramiccan be made to order aswindows, domes, plates, rods and tubes in a wide range of sizes and thicknesses by a variety ofconventional CERAMIC forming methods such asinjection molding, isostatic pressing and PROPERTIES OF ALON OPTICAL +XN5-X( <X<2)Grain Size (typical).

2 150-250 , SpinelLattice s s Kg/mm2(Knoop Indentation, 200g load)Fracture MPa-m1/2 Flexure ,000 psiSpecific cal/g-oCThermal Conductivity(cal/cm-s-oC) to 6 micronsIndex of RefractionO(Pm) CoefficientO(Pm)D(cm-1) GHz)(x10-5) Expansion (microns)2 mm thick sampleALON OPTICAL CeramicTMComparison To Window Materials Property ALONTMO pticalCeramicFusedSilicaSapphireSpinelMa gnesiaZincSulfideYttriaComposition Al23O27N5 SiO2 Al2O3 MgAl2O4 MgO ZnSY2O3 Density(Grams/cm3) thickness(lb/ft2) sModulus(Msi) (Ksi)55 (kg/mm2)

3 1850 46022001520640250720 ALON OPTICAL CeramicTMComparison To Ceramics for Semiconductor ProcessingPROPERTIESC onditionsUNITSALON Coors AluminaAD Quartz(fused silica) SizeMicrometers150-25066single crystal amorphousColorTransparentivoryivoryTrans parent TransparentFlexural StrengthMPa (ksi)379 (55)379 (55)552 (80)742 ( )48 (7)Fracture ToughnessMPa-m^1/22 (indentationmethod)3 to 43 to Strength25 CMPa (ksi)2677 (388)(see note 1)2600 (377)3792 (550)650 - 1100 HardnessKnoop,200 g load, 25 C) (kg/mm2)1850200020002000460 Elastic ModulusGPa (psi x 106)334 ( )370 ( )386 ( )344 ( )70 ( )Shear Moduluspsi x 106135 ( )Poisson's ConductivityW/m-K (cal/cm-sec-oC) ( )37 ( )33 ( ) (30-900 C)10-6/ Heat(J/g-K) (Cal/g - C)) ( ) ( ) ( ) ( ) Shock'T (oC) CN/A200N/A200>1400 Transmission range (microns) Constant1 kHz @25 C1 Factor (x10-5)1 kHz @25 C1 :1 ASTM C773-88