Ceradyne Thermo-Sil® HS Fused Silica

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Ceradyne Thermo-Sil® HS Fused Silica (discontinued **)
Categories:	Ceramic; Oxide; Silicon Oxide
Material Notes:	Fused Silica is an excellent thermal insulator with an extremely low coefficient of thermal expansion. It is excellent for thermal shock applications. The key characteristics of this material are: High Thermal Shock Resistance Radio wave, IR & Microwave Transparent Information provided by Ceradyne Company Ceradyne was acquired by 3M in 2012. The product line has been extensively renamed and reconfigured.
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Physical Properties	Original Value	Comments

Bulk Density	1.99 - 2.02 g/cc
Water Absorption	8.0 - 10 %	ASTM C20
Porosity	8.0 - 10 %	ASTM C20
Crystallinity	<= 1.0 %

Mechanical Properties	Original Value	Comments
Modulus of Elasticity	37.2 GPa
Modulus of Rupture	0.0172 - 0.0200 GPa	ASTM C133
Flexural Strength	17.2 - 20.0 MPa
Compressive Strength	48.3 - 51.7 MPa	ASTM C133

Thermal Properties	Original Value	Comments
CTE, linear	0.600 µm/m-°C @Temperature 20.0 °C
Specific Heat Capacity	0.630 J/g-°C @Temperature 800 °C
	1.00 J/g-°C @Temperature 20.0 °C
Thermal Conductivity	0.840 W/m-K
Shrinkage	0.0 % @Temperature 1100 °C

Optical Properties	Original Value	Comments
IR Transmittance	90 %	transparent; thickness not quantified
UV Transmittance	90 %	transparent; thickness not quantified

**
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CCERDN28 / 711

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