Click on table links below to see properties
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Ferro-Ceramic Grinding Inc. machines over 15 different materials

Macor

Macor Properties
Macor® Macor is a machinable glass ceramic material offering many advantageous properties, including high use temperature, excellent insulating properties.

Macor Properties

Macor®

Macor is a machinable glass ceramic 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.

  

Properties
Units
Test
Value
Physical
Chemical Formula
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glass ceramic
Density, r
g/cm3
ASTM C20
2.52
Color
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white
Crystal Structure
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random
Water Absorption
% @R.T.
ASTM C373
0.0
Hardness
Moh's
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4.5
Hardness
knoop (kg/mm2)
Knoop 100g
250
Mechanical
Compressive Strength
MPa @ R.T.
ASTM C773
345
Tensile Strength
MPa @ R.T.
ACMA Test #4
90
Modulus of Elasticity
(Young's Mod.)
GPa
ASTM C848
66.9
Flexural Strength (MOR)
MPa @ R.T.
ASTM F417
94
Poisson's Ratio, u
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ASTM C818
0.29
Fracture Toughness, KIc
MPa x m1/2
Notched Beam Test
1.53
Thermal
Max. Use Temperature
(* denotes inert atm.)
șC
No load cond.
1000
Thermal Shock Resistance
DT (șC)
Quenching
25 - 100
Thermal Conductivity
W/m-K @ R.T.
ASTM C408
1.8
Coefficient of Linear Thermal Expansion, al
mm/m-șC (~25șC through ±1000șC)
ASTM C372
6.3 - 9.7
Specific Heat, cp
cal/g-șC @ R.T.
ASTM C351
0.19
Electrical
Dielectric Constant
1MHz @ R.T.
ASTM D150
6.03
Dielectric Strength
kV/mm
ASTM D116
40
Electrical Resistivity
Wcm @ R.T.
ASTM D1829
>1017
 
 
*Although we have no reason to doubt the accuracy of the data presented, Ferro-Ceramic Grinding Inc. offers this information for comparison only, and disclaims any and all liability from error, omissions or inaccuracies, such that it does not constitute a warranty or representation for which we shall assume legal responsibility.