Korth Kristalle GmbH

Refractive Index

 
 

Sapphire (Al2O3)

Properties (Al2O3)   
Transmission Range   0,16 - 4,7 µm  
Refractive Index   no=1,766/ne=1,758 @633nm 
Reflective Loss   16,94% @2,9 µm (1 surface)  
Reststrahlen  13.5 µm 
Density   3.99 g/cm3  
Melting Point   2053 °C  
Molecular Weight   101.9613  
Thermal_Conductivity   || C: 35,1perp. C 33 @300K  
Specific Heat   753 J/(kg·K)   
Thermal Expansion   perp. C 5 || C 5,6 · 10-6/ K @293K 
Hardness (Mohs)   || C: 1900 perp. C 2200 
Young`s Modulus   400 GPa
Shear Modulus   145 GPa  
Bulk Modulus   207 GPa  
Rupture Modulus   1200 MPa  
Elastic Coefficient   [C11= 495; C12=160; C33= 497; C44= 146; C13= 115; C14= 23 GPa
Dielectric Constant   || C 10,55; perp. C8,6 
Solubility in Water   unsoluble  
Type of Material   Single crystal, synthetic  
Crystal Structure  hexagonal, a = 4,785 Å  c = 12,991 Å  
Cleavage Planes   no cleavage  
Standard diameter   max. 210 mm  
Application   IR optics, laser optics, pressure optics  
Remarks  resistant against solvents, most acids and bases 

Transmission spectrum

AL2O3 2MM HOMEPAGE ENGL.JPG

Transmission spectrum-2

Al2O3 englisch

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