Corning TSG Titania Silicate Low Expansion Glass

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Corning TSG Titania Silicate Low Expansion Glass
Categories:	Ceramic; Glass; Optical
Material Notes:	TSG has a similar composition to ULE® and is made using the same flamehydrolysis process. TSG has a relaxed Absolute CTE requirement for those applications that do not require a zero CTE material, however CTE variation remains controlled through process discipline. The mean CTE is 0 ± 100 ppb/°C from 5°C to 35°C with a 95% confidence level. Excellent resistance to weathering. Exhibits virtually no surface clouding or electrical surface leakage when subject to attack by water, sulfur dioxide, and atmospheric gases. High resistance to attack by nearly all chemical agents. Information provided by Corning Incorporated.
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Physical Properties	Original Value	Comments

Density	2.21 g/cc

Mechanical Properties	Original Value	Comments
Hardness, Knoop	460	kg/mm² at 200g load
Tensile Strength, Ultimate	49.8 MPa
Modulus of Elasticity	67.6 GPa
Bulk Modulus	34.1 GPa
Poissons Ratio	0.17
Shear Modulus	29.0 GPa

Electrical Properties	Original Value	Comments
Volume Resistivity	4.00e+11 ohm-cm @Temperature 200 °C	100Hz

Thermal Properties	Original Value	Comments
CTE, linear	-0.250 µm/m-°C @Temperature -75.0 °C	Approximate Instantaneous Value
	-0.180 µm/m-°C @Temperature -50.0 °C	Approximate Instantaneous Value
	-0.0300 µm/m-°C @Temperature 0.000 °C	Approximate Instantaneous Value
	-0.100 - 0.100 µm/m-°C @Temperature 5.00 - 35.0 °C	Specified mean from 5 to 35°C
	0.0400 µm/m-°C @Temperature 250 °C	Approximate Instantaneous Value
	0.0500 µm/m-°C @Temperature 50.0 °C	Approximate Instantaneous Value
	0.0700 µm/m-°C @Temperature 200 °C	Approximate Instantaneous Value
	0.0800 µm/m-°C @Temperature 100 °C	Approximate Instantaneous Value
	0.0800 µm/m-°C @Temperature 150 °C	Approximate Instantaneous Value
Specific Heat Capacity	0.767 J/g-°C @Temperature 25.0 °C
Thermal Conductivity	1.31 W/m-K @Temperature 25.0 °C
Softening Point	1490 °C
Annealing Point	1000 °C
Strain Point	890 °C

Descriptive Properties
Thermal Diffusivity	.0079 cm²/s

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CCORNG969 / 233284

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