Macor® machinable glass ceramic withstands high temperature while providing tight tolerance capability.
Special Features
- Excellent physical properties
- High dielectric strength
- Electrical resistivity
- Non-porous and non-shrinking
- Machined into complicated shapes and precision parts using ordinary metal working tools
Properties
| Temperature Limit | 1000° C |
| Dielectric Constant, 1 Khz at 25° C | 6.03 |
| Dielectric Strength | 40KV/mm |
| DC Volume Resistivity at 25° C | >10 ohm-cm |
| Thermal Conductivity at 25° C | 1.46 W/m° C |
| Coefficient of Expansion 25-300° C | 93 x 10 /° C |
| Density, g/cm | 2.25 |
| Modulus of Elasticity at 25° C | 64 GPa |
| Porosity | 0 |
Available as Finished Parts Today
- Available in bulk shapes or fully machined
- Machinable to tight tolerances with standard metal working tools
- No firing required after machining
Applications
- Electrical or Thermal Insulator
- Structural Components
- Semi-Conductor Processing
- Electrical and Opto-Electronic Equipment
- Many Other Uses
Machinable Glass Ceramic
- is MACHINABLE with no ordinary metal working tools
- allows FAST TURNAROUND, no post firing required
- holds TIGHT TOLERANCES, up to .00005″
- withstands HIGH TEMPERATURE, up to 1000°C (no load)
- is CLEAN, no outgassing and zero porosity
Properties
MACOR® Machinable Glass Ceramic has a continuous use temperature of 800°C and a peak temperature of 1000°C. Its coefficient of thermal expansion readily matches most metals and sealing glasses. It is non-wetting, exhibits zero porosity, and unlike ductile materials, won’t deform. It is an excellent insulator at high voltages, various frequencies, and high temperatures. When properly baked out, it won’t outgas in vacuum environments.
Machining
Machining tolerances are surprisingly tight, up to .0005″. It can be machined to a surface finish of less than 20µin.-AA. Configurations are limited only by available equipment and the experience of the machinist.
Sealing, Joining and Metalizing
MACOR® MGC can also be joined or sealed – both to itself and to other materials – in a number of ways: metalized parts can be soldered together and brazing has proven an effective method of joining the material to various metals; epoxy produces a strong joint, and a sealing glass creates a vacuum tight seal. Even a straight-forward mechanical joint is possible.
It can be thick film metalized using metal links, or thin film metalized by sputtering.