SCHOTT Xensation® Cover
Chemical strengthened alumino-silicate cover glass for tough applications

Key-Benefits 

  • Extremely high impact and bending strength for thinner, sleeker and more touch sensitive solutions
  • High scratch resistance and tolerance for superior aesthetic appeal, durability, strength and reliability even after surface damage
  • Manifold combinations of CS and DoL at the highest levels
  • Easy to process and strengthen according to accepted industry standards
Mechanical Properties
Density ρ 2.477 g/cm3
Young’s Modulus E 74 kN/mm2
Poisson´s Ratio ν 0.215
Shear Modulus G 30 kN/mm2
Knoop Hardness HK 0.1/20  
   non-strengthened 534
   strengthened 639
Vickers Hardness HV 0.2/20  
   Non-strengthened 617
   Strengthened 681
Optical Properties
Refractive Index at 588 nm (nd) 633 nm 780 nm
Core Glass 1.508 1.506 1.502
Compression Layer      
KNO3 pure 1.516 1.514 1.510
Transmittance τ  (Glass Thickness 0.7 mm)
840 nm > 91.5 %
560 nm > 91.5 %
380 nm > 90 %
Photoelastic Constant nm/(cm*MPa) 29.2
Typical spectral visibile light transmittance characteristics* τv
0.55 > 92.5 %
0.70 > 92.5 %
1.10 > 92.4 %
2.00 > 92.3 %

* Intergral transmittance values for visible range of light are determined
according to DIN EN 410 by using standard light type D65
Thermal Properties
Thermal Conductivity λ (25 °C) 0.96 W/(m·K)1
Specific Heat Capacity Cp (20 °C; 100 °C) 0.84 KJ/(kg·K)
Coefficient of Mean Linear
Thermal Expansion α (20 °C; 300 °C)
8.8 · 10-6 K-1
Transformation Point Tg 615 °C
Annealing point (1013 dPas) 635 °C
Softening point (107.6 dPas) 880 °C
Working point (104 dPas) 1265 °C
Electrical Properties*
Frequency (MHz)     Dielectric Constant (ɛ́)   Loss Tangent (tan δ)
1 7.74 0.011
54 7.49 0.008
480 7.40 0.009
825 7.38 0.010
912 7.38 0.010
1977 7.35 0.012
2170 7.35 0.012
2986 7.34 0.012
Electric Volume Resistivity ρD for A.C. at 50Hz
at 250 °C at 350 °C  
1.5 · 106 Ω · cm    8.9 · 104 Ω · cm  

* These values are no guaranteed data – for customer orientation only.
Chemical Properties
Hydrolytic resistance acc. to DIN ISO 719         
Hydrolytic class HGB 1
Acid resistance acc. to DIN 12 116
Acid class S 4
Alkali resistance acc. to DIN ISO 695
Class A1
Chemical Strengthening
Compressive stress (K-CS) capable > 900 MPa
Depth of layer (Na-DoL) capable > 100 μm
4-Point bending strength capable > 850 MPa
Forms supplied*
Thickness Range: 0.55 – 2.00 mm
Sheet size: 1,150 x 950 mm; 475 mm x 575 mm

* Further thicknesses and sheet sizes are available on request.
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