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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.

Machinable Glass Ceramics

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

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.

Specifications

Rod: Ф25mm~Ф160mm, up to 300mm long
Plate: customized various sizes.