Ceradyne Thermo-Sil® Castable 120 Fused Silica

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Ceradyne Thermo-Sil® Castable 120 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	1.856 g/cc
Water Absorption	13 - 15 %	ASTM C20
Porosity	13 - 15 %	ASTM C20
Crystallinity	<= 2.0 %

Mechanical Properties	Original Value	Comments
Modulus of Rupture	0.00830 - 0.0103 GPa	ASTM C133
Flexural Strength	8.30 - 10.3 MPa
Compressive Strength	27.6 - 41.4 MPa	ASTM C133

Thermal Properties	Original Value	Comments
CTE, linear	0.800 µm/m-°C @Temperature 20.0 °C
Specific Heat Capacity	1.00 J/g-°C @Temperature 20.0 °C
Thermal Conductivity	0.620 W/m-K
Shrinkage	0.2 % @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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CCERDN32 / 715

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