Macor is a machineable glass-ceramic developed and sold by Corning Incorporated It is a white material that looks somewhat like porcelain. Macor has excellent thermal characteristics, acting as efficient insulation, and stable up to temperatures of 1000 ￂﾰC, with very little thermal expansion or outgassing. It can be machined into any desired shape using standard metalworking bits and tools. This combination of machinability and good thermal prop...
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Macor is a machineable glass-ceramic developed and sold by Corning Incorporated It is a white material that looks somewhat like porcelain. Macor has excellent thermal characteristics, acting as efficient insulation, and stable up to temperatures of 1000 ￂﾰC, with very little thermal expansion or outgassing. It can be machined into any desired shape using standard metalworking bits and tools. This combination of machinability and good thermal properties have made it the material of choice in many engineering contexts.
Macor is made up of fluorphlogopite mica in a borosilicate glass matrix. Its composition is roughly:
Macor has a density of 2.52 g/cm, and a thermal conductivity of 1.46 W/(mￂﾷK). Its low-temperature (25 to 300 ￂﾰC) thermal expansion is 93ￃﾗ10 -7 m/(mￂﾷK).
Macor is a very good insulator with excellent tolerance. Even with temperature changes, its low thermal expansion ensures that its shape changes very little.
There are no major safety concerns or toxic effects...
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