Corning HPFS® 8655 ArF Grade High Purity Fused Silica

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Corning HPFS® 8655 ArF Grade High Purity Fused Silica
Categories:	Ceramic; Glass; Optical
Material Notes:	Glass code 8655 is a high purity non-crystalline silica glass with excellent optical qualities. Product characteristics include extraordinary low refractive index variations leading to state-of-the-art homogeneity values, low birefringence, exceptional transmittance from the deep ultraviolet through the infrared region, and an ultra-low thermal expansion coefficient. Information provided by Corning Incorporated.
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Physical Properties	Metric	English	Comments

Density	2.20 g/cc	0.0795 lb/in³

Mechanical Properties	Metric	English	Comments
Knoop Microhardness	522	522	kg/mm² (100 g load)
Tensile Strength	54.0 MPa	7830 psi
Modulus of Elasticity	73.00 GPa	10590 ksi
Modulus of Rupture	0.0524 GPa	7.60 ksi	abraded
Compressive Strength	1140 MPa	165000 psi
Bulk Modulus	35.9 GPa	5210 ksi
Poissons Ratio	0.16	0.16
Shear Modulus	31.0 GPa	4500 ksi

Thermal Properties	Metric	English	Comments
CTE, linear	0.480 µm/m-°C @Temperature -100 - 100 °C	0.267 µin/in-°F @Temperature -148 - 212 °F
	0.520 µm/m-°C @Temperature 5.00 - 35.0 °C	0.289 µin/in-°F @Temperature 41.0 - 95.0 °F
	0.570 µm/m-°C @Temperature 0.000 - 200 °C	0.317 µin/in-°F @Temperature 32.0 - 392 °F
Specific Heat Capacity	0.770 J/g-°C	0.184 BTU/lb-°F
Thermal Conductivity	1.38 W/m-K	9.58 BTU-in/hr-ft²-°F
Softening Point	1630 °C	2960 °F	10^7.6 Poise
Annealing Point	1180 °C	2160 °F	10¹³ Poise
Strain Point	1070 °C	1950 °F	10¹⁴ Poise

Optical Properties	Metric	English	Comments
Refractive Index	1.433027 @Wavelength 2326.050 nm	1.433027 @Wavelength 2326.050 nm	22°C, 1 atm, N₂
	1.44078 @Wavelength 1813.570 nm	1.44078 @Wavelength 1813.570 nm	22°C, 1 atm, N₂
	1.450304 @Wavelength 1014.26 nm	1.450304 @Wavelength 1014.26 nm	22°C, 1 atm, N₂
	1.453731 @Wavelength 780.237 nm	1.453731 @Wavelength 780.237 nm	22°C, 1 atm, N₂
	1.456425 @Wavelength 656.454 nm	1.456425 @Wavelength 656.454 nm	22°C, 1 atm, N₂
	1.457077 @Wavelength 632.990 nm	1.457077 @Wavelength 632.990 nm	22°C, 1 atm, N₂
	1.458522 @Wavelength 587.725 nm	1.458522 @Wavelength 587.725 nm	22°C, 1 atm, N₂
	1.463561 @Wavelength 480.126 nm	1.463561 @Wavelength 480.126 nm	22°C, 1 atm, N₂
	1.471446 @Wavelength 388.975 nm	1.471446 @Wavelength 388.975 nm	22°C, 1 atm, N₂
	1.479824 @Wavelength 334.244 nm	1.479824 @Wavelength 334.244 nm	22°C, 1 atm, N₂
	1.491056 @Wavelength 289.444 nm	1.491056 @Wavelength 289.444 nm	22°C, 1 atm, N₂
	1.523018 @Wavelength 226.572 nm	1.523018 @Wavelength 226.572 nm	22°C, 1 atm, N₂
	1.542731 @Wavelength 206.266 nm	1.542731 @Wavelength 206.266 nm	22°C, 1 atm, N₂
	1.575091 @Wavelength 184.950 nm	1.575091 @Wavelength 184.950 nm	22°C, 1 atm, N₂
Abbe Number	67.6	67.6	V_e
	67.8	67.8	V_d
Optical Dispersion	0.006797	0.006797	nF'-nC'
Transmission, Visible	>= 99 % @Wavelength 375 - 800 nm	>= 99 % @Wavelength 375 - 800 nm
IR Transmittance	0.00 % @Wavelength 4300 nm	0.00 % @Wavelength 4300 nm
	12 % @Wavelength 4000 nm	12 % @Wavelength 4000 nm
	70 % @Wavelength 3500 nm	70 % @Wavelength 3500 nm
	87 % @Wavelength 3000 nm	87 % @Wavelength 3000 nm
	98 % @Wavelength 2500 nm	98 % @Wavelength 2500 nm
	>= 99 % @Wavelength 1500 nm	>= 99 % @Wavelength 1500 nm
	>= 99 % @Wavelength 1000 nm	>= 99 % @Wavelength 1000 nm
	>= 99 % @Wavelength 2000 nm	>= 99 % @Wavelength 2000 nm
UV Transmittance	>= 99.75 % @Wavelength 193 nm	>= 99.75 % @Wavelength 193 nm	Internal Transmission Ti = 99.75 %/mm @193 nm.

Descriptive Properties
Birefringence	< 1 (nm/cm)		(lower upon request)
Homogeneity Grade	AA, A, C, F
Inclusion Class	0, 1, 2
Metallic Impurities	< 10 ppb
OH Content	< 1 ppm
Optical Stress Coefficient	35.0 nm/cm MPa
Striae Class	5		ISO 10110-4

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

CCORNG09x / 281583

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