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Ensinger PEI

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Corning Large Cover Gorilla® Glass Touch Screen Glass
Categories: Ceramic; Glass; Optical

Material Notes: Corning® Gorilla® Glass is a damage-resistant cover glass that is elegant, lightweight, and durable enough to resist many real-world events that commonly cause glass failure. The composition of Corning Gorilla Glass allows for a deep layer of high compressive stress (created through an ion-exchange process). This compression acts as a sort of “armor,” making the glass exceptionally tough and damage resistant. Additionally, Corning Gorilla Glass is formed using the same proprietary fusion process as all of Corning’s high-technology display substrates. This extraordinarily precise, highly automated process produces glass with exceptionally clean, smooth, flat surfaces and outstanding optical quality.

Large Cover Gorilla® Glass is sized to serve as cover glass for displays including interactive white boards, digital signage and other large-size public displays.

Information provided by Corning Incorporated.

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Physical PropertiesOriginal ValueComments
Density 2.44 g/cc
Thickness 550 - 2000 microns
 
Mechanical PropertiesOriginal ValueComments
Vickers Microhardness 534kgf/mm²; unstrengthened (200 g load)
 649kgf/mm²; strengthened (200 g load)
Modulus of Elasticity 71.7 GPa
Compressive Strength 800 MPaChemically Strengthened, >40 µm layer
Poissons Ratio 0.21
Fracture Toughness 0.700 MPa-m½
Shear Modulus 29.6 GPa
 
Thermal PropertiesOriginal ValueComments
CTE, linear 8.45 µm/m-°C
@Temperature 0.000 - 300 °C
Softening Point 852 °C107.6 Poise
Annealing Point 649 °C1013.2 Poise
Strain Point 563 °C1014.7 Poise
 
Optical PropertiesOriginal ValueComments
Refractive Index 1.5094
@Wavelength 633 nm
core glass
 1.5116
@Wavelength 633 nm
compression layer
Transmission, Visible >= 91.5 %
@Wavelength 380 - 780 nm
 >= 92 %
@Wavelength 480 - 730 nm
 
Descriptive Properties
Photo-elastic Constant29.4 nm/cm/MPa

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CCORNG14h / 178187

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