MACOR/ Machinable Glass Ceramics/ Ceramic Insulator

Machinable Glass Ceramics
Glass Ceramics Itis a polycrystalline composite made of fluorophlogopite and glass.It possesses good machinability and can be lathed, milled, planed, ground, bored, incised and threaded. It also has the advantages of insulation, pore-free, high/ low-temperature resistant, acid and alkali resistant and thermal impact resistant.

Main properties
Magnetic susceptibility d1.2× 10-6
Dielectric constant 6^ 7
Breakdown voltage e15 KV/ mm
Flexural strength e108Mpa
Fracture Modulus 15000bf/ in2
mpact toughness e 3.8 KJ/ m2
Knoophardness 176^ 343 kg/ mm2
Volume density 2.5^ 2.8 g/ cm3
Range of operating temperature -200^ + 1000
Thermal expansion coefficient d94× 10-7 / K
hermal conductivity e 1.7 W/ m· K

Applications
It is widely used for nuclear, microwave high vacuum insulation, high precision magnetism-free skeleton for aeronautic and astronautic electrical devices, ultra-high voltage insulation for electric motors and structural parts at strong erosion environments. In terms of machinability, it can take place of aluminum oxide and boron nitride ceramics that are difficult to machine