Saint-Gobain Vitreosil® Clear Fused Quartz Tubing

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Saint-Gobain Vitreosil® Clear Fused Quartz Tubing
Categories:	Ceramic; Glass; Oxide; Silicon Oxide
Material Notes:	Electrically fused quartz is recognized for its combination of purity, chemical inertness, physical stability, thermal shock resistance, high electrical resistivity, and high operating temperatures. 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	8000 - 10000	MPa Vickers DPH
Hardness, Mohs	6.0 - 7.0
Tensile Strength, Ultimate	70.0 MPa	Safety factor of 10-20X is necessary in practice
Modulus of Elasticity	74.0 GPa
Flexural Strength	50.0 MPa	Bending Strength
Compressive Strength	2000 MPa
Poissons Ratio	0.17
Shear Modulus	32.0 GPa
Shear Strength	70.0 MPa	Safety factor of 10-20X is necessary in practice

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	1583 °C	Varies with thermal history
Annealing Point	1190 °C	Varies with thermal history
Strain Point	1108 °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	90 %	Typical
UV Transmittance	75 % @Wavelength 220 - 250 nm

Component Elements Properties	Original Value	Comments
SiO2	>= 99.9 %

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