Corning Gorilla® Glass 2

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Corning Gorilla® Glass 2 (discontinued **)
Categories:	Ceramic; Glass; Optical
Material Notes:	Corning® Gorilla® Glass 2 is an environmentally friendly alkali aluminosilicate thin sheet glass that is better able to survive the real world events that most commonly cause glass failure. Its superior composition allows a deeper layer of chemical strengthening than is possible with most other chemically strengthened glasses — making it both durable and damage resistant. The chemical strengthening produces a deep compressive layer of high compressive stress. This glass is widely used in smart phone, tablet, and laptop displays, other touchscreens, optical components, and other high strength glass applications. Information provided by Corning Incorporated.
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Physical Properties	Original Value	Comments

Density	2.42 g/cc

Mechanical Properties	Original Value	Comments
Vickers Microhardness	534	kgf/mm²; unstrengthened
	649	kgf/mm²; strengthened
Modulus of Elasticity	71.5 GPa
Poissons Ratio	0.21
Fracture Toughness	0.680 MPa-m½
Shear Modulus	29.6 GPa

Electrical Properties	Original Value	Comments
Dielectric Constant	7.18 @Frequency 1.75e+8 Hz
	7.21 @Frequency 2.75e+8 Hz
	7.21 @Frequency 5.00e+8 Hz
	7.23 @Frequency 6.00e+8 Hz
	7.23 @Frequency 3.75e+8 Hz
	7.24 @Frequency 5e+7 Hz
	7.24 @Frequency 9.00e+8 Hz
	7.39 @Frequency 2.986e+9 Hz
	7.43 @Frequency 2.466e+9 Hz
	7.46 @Frequency 1.977e+9 Hz
	7.52 @Frequency 1.499e+9 Hz
Dissipation Factor	<= 0.03 @Frequency 5e+7 Hz
	<= 0.03 @Frequency 1.75e+8 Hz
	<= 0.03 @Frequency 2.75e+8 Hz
	<= 0.03 @Frequency 3.75e+8 Hz
	<= 0.03 @Frequency 5.00e+8 Hz
	<= 0.03 @Frequency 6.00e+8 Hz
	<= 0.03 @Frequency 9.00e+8 Hz
	<= 0.03 @Frequency 1.499e+9 Hz
	<= 0.03 @Frequency 1.977e+9 Hz
	<= 0.03 @Frequency 2.466e+9 Hz
	<= 0.03 @Frequency 2.986e+9 Hz

Thermal Properties	Original Value	Comments
CTE, linear	8.14 µm/m-°C @Temperature 0.000 - 300 °C
Softening Point	895 °C	10^7.6 Poise
Annealing Point	653 °C	10^13.2 Poise
Strain Point	599 °C	10^14.7 Poise

Optical Properties	Original Value	Comments
Refractive Index	1.50	core glass
	1.51	compression layer
Transmission, Visible	>= 91.5 % @Wavelength 560 nm
IR Transmittance	>= 91.5 % @Wavelength 750 nm
	>= 91.5 % @Wavelength 1200 nm
	>= 92 % @Wavelength 1750 nm
	>= 92 % @Wavelength 2000 nm
UV Transmittance	0.00 % @Wavelength 250 nm
	>= 91.5 % @Wavelength 380 nm

**
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CCORNG14 / 138088

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