Aremcolox 502-1800 is resistant to operating temperatures of 2,200ºF in vacuum and 1,200ºF in oxidizing atmospheres. It is machinable aluminum nitride and boron nitride ceramic composite. Aluminum nitride improves abrasion resistance, and calcium-stabilized binder system provides resistance to moisture pickup, spalling, and cracking. Properties include dielectric constant of 6.4 at 1 MHz, volume resistivity greater than 1,015, and 3.1 ppm/ºF coefficient of thermal expansion.