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MACOR® Machinable Glass Ceramic Rod

MACOR® Machinable Glass Ceramic Rod is a versatile composite of fluorophlogopite mica and borosilicate glass, engineered to deliver high dielectric strength, zero porosity, and resistance to temperatures up to 1000 °C in air. It can be machined with standard metal tools, enabling high-precision shaping without post-firing, making it ideal for small-scale prototyping and intricate component design. Common applications span aerospace insulators, medical laser apertures, RF-resistant parts, and ultra-clean vacuum chamber components. Specific uses include test substrates for microwave dielectric tuning, pinhole fixtures in dental lasers, and outgassing-free supports in optical alignment systems. Its consistent thermal stability and stress-resistance under impact and fatigue conditions also make it a focus in dynamic ceramics and energy-dissipation material studies. The MACOR® rod's unique ability to bridge machinability with insulating and structural robustness positions it as an enabling material in both cutting-edge scientific instruments and custom industrial tooling.
Formula: SiO₂ 46/Al₂O₃ 16/MgO 17/K₂O 10/B₂O₃ 7
Diameter: 12mm
Length: 50mm
UOM Code: 591-999-84
Legacy Code: MA807912
Distributor Code:
GF59199984
SKU: 1000126147
Product Code: MA80-RD-000112

Tolerances

Rod
Diameter +20% / -10%

Tolerances

Rod
Diameter +20% / -10%
Technical Data Sheet
Safety Data Sheet
$118.00
each
No Minimum order Free technical support *Free delivery worldwide

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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
Pultrusions
Element Value
Compressive strength( MPa ) 345
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