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Formula: SiO₂ 46/Al₂O₃ 16/MgO 17/K₂O 10/B₂O₃ 7
Form: Bar
Material: MACOR® Machinable Glass Ceramic
Commodity: Glasses
Macor is a unique machinable glass-ceramic developed by Corning Inc. This versatile material, with its porcelain-like appearance, offers the best of both glass and ceramic properties. Macor is an excellent insulator, thermally stable up to 1000°C, and exhibits zero porosity. It’s machinable with standard tools, holds tight tolerances and requires no post firing. Ideal for high temperature, vacuum and corrosive environments, Macor is the perfect solution for your advanced material needs. Explore its potential today.
Tolerances
Bar
| Side Length | =<10mm | ±10% |
|---|---|---|
| Side Length | >10mm | ±1mm |
| Side Length (Of Longer Side) | >10mm | ±1mm |
| Side Length (Of Longer Side) | =<10mm | ±10% |
| Length | <100mm | ±1mm |
| Length | >=100mm | +5% / -1% |
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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