Xensation®
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Technical Details of Xensation®

The impressive technical properties of the Xensation® high-performance cover glass make it the ideal solution for applications with the highest demands for break and impact resistance. In the smartphone back cover and smartwatch markets, the powerful Xensation® cover glass stands unrivaled.

Technical excellence for maximum cover glass protection and durability

Exceptional shock resistance

In everyday use, mobile devices frequently face not only falls but also blunt impacts. Xensation® cover glass withstands these impacts exceptionally well, as proven by the ball drop test, another standard test for smartphone cover glass. The high surface tension achieved by the exchange of potassium ions makes the glass highly resistant to different types of impact.

Drop test champion

Break resistance in drop tests is crucial for the selection of smartphone cover glass. Our Xensation® cover glass conquers this challenge through effective chemical strengthening using sodium-ion exchange. Simulated realistic drops from various heights and onto different rough surfaces demonstrate that mobile devices equipped with Xensation® are always optimally protected.

Resilient to scratches

Xensation® Core and Xensation® α is especially designed with enhanced scratch resistance in mind. Thanks to the special glass composition, the formation of annoying scratches is significantly reduced. The flawless appearance of the glass surface is preserved for a longer time.

Outstanding bending strength

As smartphone designs continue to evolve, becoming bigger, thinner and more intricate, there is an increasing demand for greater bending strength. Xensation® high-performance cover glass is specifically engineered to handle high compressive stresses on the glass surface, showcasing remarkable performance in bending tests and offering optimal protection for devices during daily use.
Mechanical properties
Thermal properties
Optical properties
Chemical properties
Electrical properties
Chemical strengthening
Forms supplied

Mechanical properties

Description Xensation® Core Xensation® α Xensation® Up.
Density ρ 2.38 g/cm3 2.39 g/cm3 2.48 g/cm3
Young’s modulus E 78 kN/mm2 80 kN/mm2 82 kN/mm2
Poisson’s ratio ν 0.22 0.26 0.22
Shear modulus G 32 kN/mm2 32 kN/mm2 34 kN/mm2
Vickers hardness HV
> unstrengthened 610 570 630
> strengthened* 670 660 680
* Typical values that can be achieved after chemical strengthening process
 
All values are typical measured values and refer to unstrengthended glass

Thermal properties

Description Xensation® Core Xensation® α Xensation® Up.
Coefficient of mean linear thermal expansion α(20 – 300 °C) 5.0 · 10-6 K-1 5.3 · 10 –6 K–1 8.3 · 10 –6 K–1
Transformation temperature Tg 580 °C 577 °C 525 °C
Viscosity
> Annealing point at 1013 dPas 590 °C 589 °C 540 °C
> Softening point at 107.6 dPas 820 °C 840 °C 760 °C
> Working point at 104 dPas 1190 °C  1233 °C 1120 °C
 
All values are typical measured values and refer to unstrengthended glass

Optical properties

Description Xensation® Core Xensation® α Xensation® Up.
Wavelength λ [nm] 595 nm
Measurement method FSM-LE
Refractive index n of core glass 1.511 1.508 1.521
Photoelastic constant C [nm/(cm*MPa)] 31.0 30.0 27.8
Transmittance T [%] (t = 0.78 mm) >91 >91 >91
 
All values are typical measured values and refer to unstrengthended glass

Chemical properties

Description Xensation® Core Xensation® α Xensation® Up.
Hydrolytic resistance acc. to DIN ISO 719
> Hydrolytic class HGB 1 HGB1 HGB2
> Equivalent of alkali Na2O per gram of glass grains [µg/g] 21 32 38
Acid resistance acc. to DIN 12 116
> Acid class S3 S2 S4
> Half surface weight loss after 6 hours [mg/dm²] 8.5 1.4 19
Alkali resistance acc. to DIN ISO 695
> Alkali class A2 A2 A1
> Surface weight loss after 3 hours [mg/dm²] 104 92 42
 
All values are typical measured values and refer to unstrengthended glass

Electrical properties (extrapolated)

  Xensation® Core Xensation® α Xensation® Up.
Frequency ƒ0 [MHz] Dielectric constant ε Loss tangent tan δ Dielectric constant ε Loss tangent tan δ Dielectric constant ε Loss tangent tan δ
54 6.1 0.009 6.1 0.008 7.3 0.007
480 6.0 0.010 6.0 0.009 7.1 0.008
825 6.0 0.010 6.0 0.010 7.1 0.009
912 6.0 0.010 6.0 0.010 7.1 0.009
1977 6.0 0.011 6.0 0.011 7.0 0.010
2170 6.0 0.011 6.0 0.011 7.0 0.010
2986 5.9 0.011 6.0 0.012 7.0 0.011
 
All values are typical measured values and refer to unstrengthended glass

Chemical strengthening*

Description Xensation® Core Xensation® α Xensation® Up.
Compressive stress CS capable > 900 MPa capable > 900 MPa capable > 900 MPa
Depth of compressive layer DoCL capable >180 μm capable > 180 µm capable > 150 µm
4-Point bending strength capable > 800 MPa capable > 800 MPa capable > 700 MPa

* Values that can be achieved after chemical strengthening process

Forms supplied**

Description Xensation® Core Xensation® α Xensation® Up.
Thickness range 0.50 - 0.70 mm 0.55 – 0.80 mm 0.55 – 0.80 mm
Sheet size 1150 mm x 950 mm 1150 mm x 950 mm 1150 mm x 950 mm

** Further thicknesses and sheet sizes are available on request

Want to know more? Let’s talk

Whether you need more information, samples, a quote, or advice for a project, we would be delighted to talk to you.

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Jacqueline Engelmann
Jacqueline Engelmann

Product & Business Development Manager for Xensation® cover glass