SCHOTT Xensation® Up.
Chemical strengthened lithium alumino-silicate cover glass for high-end smartphones

Key-Benefits

  • Outstanding results in set drop performance for maximum survival likelihood after smartphone drops
     
  • Superior ion exchange capabilities in order to ensure excellent strength and processing performances
    • More flexibility to maximize strength performance
    • Wider IOX processing ranges
    • Options for shorter IOX processing time
  • Typical CS and DoL values are well balanced to obtain superior mechanical reliability
Mechanical properties*  
Density ρ 2.48 g/cm³
Young’s modulus E 82 kN/mm²
Poisson’s ratio ν 0.22
Shear modulus G 34 kN/mm²   
Vickers hardness HV 0.2/20     
   unstrengthened 630
   strengthened 680
Optical properties*      
Refractive index n at 365 nm    595 nm    640 nm   
Core glass 1.546 1.521 1.520
K-exchanged layer 1.55 1.52 1.52
Photoelastic constant
nm/(cm*MPa)
30.2 27.8 27.6
Transmittance T
between 400 nm - 800 nm   
    > 91 %
Thermal properties*  
Coefficient of mean linear
Thermal expansion α (20 °C - 300 °C)   
8.3 · 10-6 K-1   
Transformation point Tg 525 °C
Annealing point (1013 dPas) 540 °C
Softening point (107.6 dPas) 760 °C
Working point (104 dPas) 1120 °C
Electrical properties*    
Frequency (MHz) Dielectric constant (ɛ́)    Loss tangent (tan δ)   
54 7.3 0.007
480 7.1 0.008
825 7.1 0.009
912 7.1 0.009
1977 7.0 0.010
2170 7.0 0.010
2986 7.0 0.011
Chemical properties*  
Hydrolytic resistance acc. to DIN ISO 719  
Hydrolytic class HGB 2   
Equivalent of alkali Na2O per gram of glass grains [μg/g]    38
Acid resistance acc. to DIN 12 116  
Acid class S 4 W
Half surface weight loss after 6 hours in mg/dm² 19
Alkali resistance acc. to DIN ISO 695  
Class A1
Surface weight loss after 3 hours in mg/dm² 42


* Typical values
Chemical strengthening**  
Compressive stress (K-CS) capable > 900 MPa   
Depth of layer (Na-DoL) capable > 150 μm
4-Point bending strength capable > 700 MPa


** Depending on chemical strengthening process.
Forms supplied***  
Thickness Range: 0.55 – 0.80 mm   
Sheet size: 1,150 x 950 mm


*** Further thicknesses and sheet sizes are available on request.
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