Machinable Glass Ceramics

 

Machinable Glass Ceramic has a continuous use temperature of 800ºC and a peak temperature of 1000ºC. Its coefficient of thermal expansion readily matches most metals and sealing glasses. It processes 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   ≤1.2×10-6

• Dielectric constant          6～7

• Breakdown voltage        ≥15 KV/mm

• Flexural strength              ≥108Mpa

• Fracture Modulus            15000bf/in2

• Impact toughness           ≥ 3.8 KJ/m2 Knoop

• Hardness                           176～343 kg/mm2

• Volume density 　           2.5～2.8 g/cm3

• Range of operating temperature   -200～+1000℃

• Thermal expansion coefficient        ≤94×10-7 /K

• Thermal conductivity                        ≥ 1.7 W/m·K

 

Specifications

• Rod: Ф25mm～Ф160mm, up to 300mm long

• Plate: customized various sizes