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® 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® α

Xensation® Up.

Density ρ

 2.39 g/cm3

 2.48 g/cm3

 Young’s modulus E

 80 kN/mm2

 82 kN/mm2

 Poisson’s ratio ν

 0.26

 0.22

 Shear modulus G

 32 kN/mm2

 34 kN/mm2

 Vickers hardness HV

 

 

 > unstrengthened

 570

 630

 > strengthened*

 660

 680

Thermal properties

Description

Xensation® α

Xensation® Up.

 Coefficient of mean linear thermal expansion α(20 – 300 °C)

 5.3 · 10 –6 K–1

 8.3 · 10 –6 K–1

 Transformation temperature Tg

 577 °C

 525 °C

 Viscosity

 

 

 > Annealing point at 1013 dPas

 589 °C

 540 °C

 > Softening point at 107.6 dPas

 840 °C

 760 °C
 > Working point at 104 dPas  1233 °C  1120 °C

Optical properties

Description Xensation® α Xensation® Up.
Wavelength λ [nm]  365 405   518  595  640  365  405  518  595  640
Measurement method  FSM-UV  SLP-2000  SLP-2000  FSM-LE  SLP-1000  FSM-UV  SLP-2000  SLP-2000  FSM-LE  SLP-1000
Refractive index n of core glass  1.528  1.522  1.512  1.508  1.507  1.546  1.537  1.525  1.521  1.520
Refractive index n of K-exchanged layer*  1.531  1.525  1.514  1.510  1.508  1.554  1.542  1.528  1.523  1.522
Photoelastic constant C [nm/(cm*MPa)]  32.3  31.6  30.5  30.0  29.08  30.2  29.0  28.2  27.08  27.06
Transmittance T [%] (t = 0.78 mm)  89  90  91  91  92  89  90  90  91  92

Chemical properties

Description

Xensation® α

Xensation® Up.

 Hydrolytic resistance acc. to DIN ISO 719

 

 

> Hydrolytic class

 HGB1

 HGB2
 > Equivalent of alkali Na2O per gram of glass grains [µg/g]  32  38

 Acid resistance acc. to DIN 12 116

 

 

 > Acid class

 S2

 S4

 > Half surface weight loss after 6 hours [mg/dm²]

 1.4

 19
 Alkali resistance acc. to DIN ISO 695    
 > Alkali class  A2  A1
 > Surface weight loss after 3 hours [mg/dm²]  92  42

Electrical properties (extrapolated)

  Xensation® α Xensation® Up.
 Frequency ƒ0 [MHz]  Dielectric constant ε  Loss tangent tan δ  Dielectric constant ε  Loss tangent tan δ
 54  6.1  0.008  7.3  0.007
 480  6.0  0.009  7.1  0.008
 825  6.0  0.010  7.1  0.009
 912  6.0  0.010  7.1  0.009
 1977  6.0  0.011  7.0  0.010
 2170  6.0  0.011  7.0  0.010
 2986  6.0  0.012  7.0  0.011

Chemical strengthening*

Description

Xensation® α

Xensation® Up.

 Compressive stress CS

 capable > 900 MPa

 capable > 900 MPa

 Depth of compressive layer DoCL

 capable > 180 µm

 capable > 150 µm

 4-Point bending strength

 capable > 800 MPa

 capable > 700 MPa

 

*   Values that can be achieved after chemical strengthening process

Forms supplied**

Description

Xensation® α

Xensation® Up.

 Thickness range

 0.55 – 0.80 mm

 0.55 – 0.80 mm

 Sheet size

 1150 mm x 950 mm

 1150 mm x 950 mm

 

** Further thicknesses and sheet sizes are available on request

All values are typical measured values and refer to unstrengthened glass.

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