Saint-Gobain HS Grade Optical Fused Quartz

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Saint-Gobain HS Grade Optical Fused Quartz
Categories:	Ceramic; Glass; Oxide; Silicon Oxide
Material Notes:	HS Grade Optical Fused Quartz is a high purity, low [OH] natural fused quartz. It has excellent IR transmission, useful transmission from 260 to 3500 nm, excellent visual quality with low bubbles, inclusions, and striae, and is available in a variety of sizes and forms. It is made by electric fusion of high purity quartz powder under vacuum conditions resulting in a low [OH] (ca. 5 ppm) material. General properties of Fused Silica and Fused quartz: A very wide transmission range from UV to near IR; extremely high optical transmission, excellent resistance to high power laser energy, excellent homogeneity, high temperature resistance, very low thermal expansion (resistance to thermal shock), and chemical inertness. General uses for optical quartz are microlithography optical systems, optical fibers, photomasks, laser optics, LCD displays, light guides, optical, IR , and UV windows, spectrophotometer cells, slides, optical pyrometers, and lamp bodies/components. Information provided by Saint-Gobain Quartz PLC.
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Physical Properties	Original Value	Comments

Density	2.21 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Knoop	820
Vickers Microhardness	1050 - 1350	kg/m² Vickers DPH
Hardness, Mohs	7.0
Modulus of Elasticity	74.0 GPa
Flexural Strength	50.0 MPa	Bending Strength
Compressive Strength	1100 MPa
Poissons Ratio	0.17
Shear Modulus	31.0 GPa

Electrical Properties	Original Value	Comments
Electrical Resistivity	2.00e+10 ohm-cm @Temperature 800 °C
Dielectric Constant	3.78 @Frequency 100 - 2.50e+10 Hz
Dissipation Factor	0.000060 @Frequency 1e+9 Hz
	0.00075 @Frequency 1000 Hz

Thermal Properties	Original Value	Comments
CTE, linear	0.550 µm/m-°C @Temperature 0.000 - 1000 °C	average
Specific Heat Capacity	0.750 J/g-°C
Thermal Conductivity	2.00 W/m-K
Maximum Service Temperature, Air	1050 °C	Normal Conditions
	1350 °C	Extended periods if cycles remain above 300°C
	1350 °C
	1650 °C	Quick Immersion
Softening Point	1730 °C	Varies with thermal history
Annealing Point	1140 °C	Varies with thermal history
Strain Point	1075 °C	Varies with thermal history

Optical Properties	Original Value	Comments
Refractive Index	1.4585 @Wavelength 587.56 nm
	1.4667 @Wavelength 435.83 nm	n_g; Temperature Coefficient = 10.6 ppm/K
Transmission, Visible	>= 91 %	Including Fresnel reflection for 10 mm pathlength
IR Transmittance	>= 85 % @Wavelength 2600 - 2800 nm, Thickness 10.0 mm	Including Fresnel reflection for 10 mm path length.
	>= 92 % @Wavelength <=2200 nm, Thickness 10.0 mm	Including Fresnel reflection for 10 mm path length.
UV Transmittance	90 % @Thickness 10.0 mm, Wavelength 270 nm

Component Elements Properties	Original Value	Comments
SiO2	>= 99.99 %

Descriptive Properties
Bubble Class	0.1	per DIN 58927
Bubbles; Sum of CSA	< 0.01 mm²/100 cm³
Fluorescence	Blue/Violet	254 nm excitation
Granularity	Faint
Residual Strain	4 to 10 nm/cm
Striae	B	per MIL-G-174A

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 go back to viewing the property data in MatWeb's normal format.

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CSTGQZ08 / 2226

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