Momentive Performance Materials Pyrolytic Graphite (PG) Coating

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Momentive Performance Materials Pyrolytic Graphite (PG) Coating
Categories:	Carbon; Graphite; Other Engineering Material; Ceramic/Metallic Coating
Material Notes:	PG is a popular coating for sealing machined graphite hardware which does not require oxidation protection. It is the most anisotropic commercially available material and is therefore useful where thermal management is important. PG coatings can be applied to PBN crucibles and plates as in Advanced Ceramics' patented "Hot-Lip" MBE crucibles and Boralectric® heaters. Information provided by Momentive Performance Materials, formerly GE Advanced Ceramics.
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Physical Properties	Metric	English	Comments

Density	2.20 g/cc	0.0795 lb/in³

Mechanical Properties	Metric	English	Comments
Modulus of Elasticity	20.0 GPa	2900 ksi	Young's modulus
Compressive Strength	100 MPa	14500 psi

Electrical Properties	Metric	English	Comments
Electrical Resistivity	0.000250 ohm-cm	0.000250 ohm-cm

Thermal Properties	Metric	English	Comments
CTE, linear	0.500 µm/m-°C @Temperature 20.0 °C	0.278 µin/in-°F @Temperature 68.0 °F	ab direction
Thermal Conductivity	3.50 W/m-K	24.3 BTU-in/hr-ft²-°F	in "c" direction
	400 W/m-K	2780 BTU-in/hr-ft²-°F	in "ab" direction
Sublimation Temperature	3650 °C	6600 °F
Maximum Service Temperature, Air	400 °C	752 °F	oxidation limit

Optical Properties	Metric	English	Comments
Emissivity (0-1)	0.80	0.80	normal spectrum

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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