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

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Ceramic Properties - Macor

Macor is a machinable glass ceramic parts material offering many advantageous properties, including high use temperature, excellent insulating properties (electrical and thermal), and dimensional stability. It can be polished, machined to tight tolerances, tapped, sealed, and metallized.

It can be used in many of the same applications where alumina is used and the extreme high temperature and wear characteristics of alumina are not necessary.

PropertiesUnitsTestValue
Physical
Chemical Formulaglass ceramic
Density, rg/cm3ASTM C202.52
Colorwhite
Crystal Structurerandom
Water Absorption% @R.T.ASTM C3730.0
HardnessMoh's4.5
Hardnessknoop (kg/mm2)Knoop 100g250
Mechanical
Compressive StrengthMPa @ R.T.ASTM C773345
Tensile StrengthMPa @ R.T.ACMA Test #490
Modulus of Elasticity
(Young's Mod.)
GPaASTM C84866.9
Flexural Strength (MOR)MPa @ R.T.ASTM F41794
Poisson's Ratio, uASTM C8180.29
Fracture Toughness, KIcMPa x m1/2Notched Beam Test1.53
Thermal
Max. Use Temperature
(* denotes inert atm.)
CNo load cond.1000
Thermal Shock ResistanceDT (C)Quenching25 - 100
Thermal ConductivityW/m-K @ R.T.ASTM C4081.8
Coefficient of Linear Thermal Expansion, almm/m-C (~25C through 1000C)ASTM C3726.3 - 9.7
Specific Heat, cpcal/g-C @ R.T.ASTM C3510.19
Electrical
Dielectric Constant1MHz @ R.T.ASTM D1506.03
Dielectric StrengthkV/mmASTM D11640
Electrical ResistivityWcm @ R.T.ASTM D1829>1017

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

Click here to find suppliers

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