MACOR® Machinable Glass Ceramic Rod

MACOR® Machinable Glass Ceramic Rods are a popular choice in our extensive range of ceramic materials. Offering 56 variations, these machinable glass-ceramic rods provide an aluminum silicate composition with excellent electrical insulation and high-temperature resistance. Applications include semiconductor wafer handling components, vacuum viewports and feedthroughs, and other parts requiring precision machined ceramics. The availability of MACOR® Machinable Glass Ceramic Rods in multiple diameters and lengths makes them an ideal choice for the prototyping and small-scale production of ceramic mechanical components.

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Tolerance

Properties

Reference & Citations

each

Tolerances

Rod

Diameter		+20% / -10%

Material Properties for Glasses

Chemical Resistance

Element	Value
Acids - concentrated	Poor
Acids - dilute	Fair
Alkalis	Fair
Halogens	0
Metals	0

Electrical Properties

Element	Value
Dielectric constant	0
Dielectric strength( kV mm⁻¹ )	0
Volume resistivity( Ohmcm )	>10¹⁴@25

Mechanical Properties

Element	Value
Poisson's ratio	0
Tensile modulus( GPa )	67
Hardness - Knoop( kgf mm⁻² )	0
Hardness - Vickers( kgf mm⁻² )	400
Shear strength( MPa )	0
Tensile strength( MPa )	0
Fracture toughness( MPam(0.5) )	0

Physical Properties

Element	Value
Refractive index	0
Useful optical transmission range	0
Apparent porosity( % )	0
Water absorption - saturation( % )	0
Density( gcm⁻³ )	2.52

Thermal Properties

Element	Value
Melting point( C )	0
Sublimation point( C )	0
Upper continuous use temperature( C )	800-1000
Specific heat( J K⁻¹ kg⁻¹ )	790@25°C
Thermal conductivity( W m⁻¹ K⁻¹ )	1.5@20°C
Coefficient of thermal expansion( x10⁻⁶ K⁻¹ )	13@20-1000°C