Machined Glass Ceramics

Machined Glass Ceramics

Machined glass ceramics have a continuous use temperature of 800°C and a maximum temperature of 1000°C. Its coefficient of thermal expansion easily matches that of most metals and sealing glass. It is easily machined and can be turned, milled, planed, ground, bored, cut, and carved. It also offers advantages such as insulation, non-porosity, high/low temperature resistance, acid and alkali resistance, and thermal stability.

Main properties of processed glass ceramics:

Magnetic susceptibility ≤1.2×10 -6
Dielectric constant 6～7
Breakdown voltage ≥15 kV/mm
Flexural strength ≥108 MPa
Fracture modulus 15000bf/in2
Impact toughness ≥3.8 kJ/m 2 Knoop hardness
176～343 kg/mm ​​2
Bulk density 2.5～2.8 g/cm 3
Operating temperature range -200～+1000℃
Coefficient of thermal expansion ≤94×10 -7 /K
Thermal conductivity ≥ 1.7 W/m K

Areas of application of processed glass ceramics:

It is widely used for nuclear, microwave, and high-vacuum insulation, high-precision non-magnetic casings for aircraft and astronaut electrical devices, ultra-high-voltage insulation for electric motors, and structural components subject to severe erosion. In terms of machinability, it can replace difficult-to-machine aluminum oxide and boron nitride ceramics.

Characteristics of the processed glass ceramics:

Rod: Ф25 mm ~ Ф160 mm, length up to 300 mm.
Plate: various sizes upon individual order.