This technical information has been contributed by
Ferro-Ceramic Grinding, Inc.

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Ceramic Properties - Graphite

Graphite oxidizes under (heated) use in an air (oxidizing) environment, and therefore finds its use in inert and vacuum applications such as furnace insulation packages and semiconductor. This ceramic parts material has the same lubricious properties as boron nitride thanks to the same crystal structure. Used in inert atmospheres, use temperature can be upwards of 3500C.

PropertiesUnitsTestValue
Physical
Chemical FormulaC
Density, rg/cm3ASTM C202.25
Colorblack
Crystal Structurehexagonal
Water Absorption% @R.T.ASTM C3730.5 - 3.0
HardnessMoh's1.0 - 1.5
Hardnessknoop (kg/mm2)Knoop 100g--
Mechanical
Compressive StrengthMPa @ R.T.ASTM C77396
Tensile StrengthMPa @ R.T.ACMA Test #44.8
Modulus of Elasticity
(Young's Mod.)
GPaASTM C8484.8
Flexural Strength (MOR)MPa @ R.T.ASTM F41750
Poisson's Ratio, uASTM C818--
Fracture Toughness, KIcMPa x m1/2Notched Beam Test--
Thermal
Max. Use Temperature
(* denotes inert atm.)
CNo load cond.3650 *
Thermal Shock ResistanceDT (C)Quenching200 - 250
Thermal ConductivityW/m-K @ R.T.ASTM C40824
Coefficient of Linear Thermal Expansion, almm/m-C (~25C through 1000C)ASTM C3728.39
Specific Heat, cpcal/g-C @ R.T.ASTM C3510.16
Electrical
Dielectric Constant1MHz @ R.T.ASTM D150--
Dielectric StrengthkV/mmASTM D116--
Electrical ResistivityWcm @ R.T.ASTM D18297 x 10-3

This technical information has been contributed by
Ferro-Ceramic Grinding, Inc.

Click here to find suppliers

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