Saint-Gobain Spectrosil® 2100 Optical Fused Quartz

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Saint-Gobain Spectrosil® 2100 Optical Fused Quartz
Categories:	Ceramic; Glass; Oxide; Silicon Oxide
Material Notes:	Spectrosil® 2100 has improved refractive index homogeneity. Spectrosil® is a synthetic fused silica manufactured using a patented, environmentally friendly process that results in a virtually chlorine-free material of exceptional purity which is bubble-free and fluorescence-free. The 2000 series has excellent optical transmission from 180 nm in the deep UV through to 2000 nm in the IR Available in ingot, rod, tube, and components. 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	0.540 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	1710 °C	Varies with thermal history
Annealing Point	1100 °C	Varies with thermal history
Strain Point	990 °C	Varies with thermal history

Optical Properties	Original Value	Comments
Refractive Index	1.457 @Wavelength 632.8 nm	n_He-Ne; Temperature Coefficient = 10.0 ppm/K
	1.4667 @Wavelength 435.83 nm	n_g; Temperature Coefficient = 10.6 ppm/K
Transmission, Visible	95 %	Including Fresnel reflection for 10 mm pathlength
IR Transmittance	95 % @Wavelength <=2000 nm, Thickness 10.0 mm	Including Fresnel reflection for 10 mm path length.
UV Transmittance	>= 99.5 % @Thickness 10.0 mm, Wavelength 193.4 nm
	>= 99.9 % @Thickness 10.0 mm, Wavelength 240 nm

Component Elements Properties	Original Value	Comments
SiO2	>= 99.999 %

Descriptive Properties
Bubble Class	0	per DIN 58927
Bubbles; Sum of CSA	< 0.03 mm²/100 cm³
Inclusions	0
Refractive Index Homogeneity	< 10 x 10^-6	Up to 200 mm (ingot/blank)
	< 5 x 10^-6	Up to 100 mm (ingot/blank)
Residual Strain	<5 nm/cm
Striae	3	per MIL-G-174A; Direction Free

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CSTGQZ03 / 2221

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