Macor
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Macor is the trademark for a machinable glass-ceramic developed and sold by Corning Inc. It is a white material that looks somewhat like porcelain. Macor is a good thermal insulator and is stable up to temperatures of 1000 °C, with very little thermal expansion or outgassing. It can be machined using standard metalworking tools.[1]
Composition
Macor is made up of
Properties
Macor has a
Extremely machinable, Macor offers tight-tolerance capabilities, allowing complicated shape design (optimal performances up to ±0.013 mm for dimensions, < 0.5 μm for finished surface and up to 0.013 μm for polished surface). Macor remains continuously stable at 800 °C, with a maximum peak at 1000 °C under no load, and unlike ductile materials, doesn’t creep or deform. Its coefficient of thermal expansion readily matches most metals and sealing glasses. As an electric insulator, particularly at high temperatures, it is excellent at high voltages and a broad spectrum of frequencies.
Macor comes in a standard size maxi slab (about 36 cm × 36 cm × 6cm).[5] Components, bars, rods and plates can be machined within the size of this slab (hand tools can be used).
Applications
Macor is used in the following applications:
- Constant and ultra-high vacuum environments
- Laser technology
- Semiconductor / electronic
- Aerospace / space
- Medical/ laboratory equipment
- Fixtures
- Chemical
- Automobile
- Military
- Nuclear
Safety
There are no major
Machining guidelines
Key factors for successful machining are proper machining speeds and coolant. Macor can be machined with high-speed steel tools, but carbide tools are recommended for longer wear. Best results achieved by using a water-soluble coolant (such as Cimstar 40 – Pink) especially formulated for cutting and grinding glass or ceramics. Note: No post-firing is required after machining.
References
- ^ "Macor Machinable Glass".
- ^ "MACOR Brochure" (PDF).
- ^ a b c d e f "Archived copy" (PDF). www.corning.com. Archived from the original (PDF) on 13 April 2015. Retrieved 15 January 2022.
{{cite web}}: CS1 maint: archived copy as title (link) - ^ Compare Materials: Borosilicate Glass and Macor.
- ^ Corning Macor Maxi-Slab.
- ^ "Macor Glass Ceramic".