With Machinable Glass Ceramic (MGC), fabrication is fast - because it can be machined into complicated shapes and precision parts with ordinary metal working tools, quickly and inexpensively, and it requires no post firing after machining. That means no frustrating delays, no expensive hardware, no post fabrication shrinkage, and no costly diamond tools to meet specifications.
Property of Machinable Glass Ceramic
*High use temperature (800°C continuous; 1000°C peak).
*Low thermal conductivity and is a useful high temperature insulator.
*Excellent electrical insulator and is used extensively throughout the semiconductor and electronic industries.
*MGC has no porosity and when properly baked, will not outgas. It is widely used in ultra high vacuum applications.
*Strong and rigid. MGC is unlike high temperature plastics, it will not creep or deform.
*Radiation resistant and plays a key role in nuclear applications and nuclear-related research and development.
*MGC can be thick or thin film metallized, brazed, epoxy and frit bonded.
| Characteristics | Unit | 95 Al2O3 | 99 Al2O3 | ZrO2 | GPSi3N4 | BN | Glass Ceramic |
| Crystal Structure | - | hexagonal | hexagonal | tetragonal | hexagonal | hexagonal | - |
| Color | - | white | ivory | white | gray | white | white |
| Density | g/cm3 | 3.65 | 3.88 | 5.95 | 3.22 | 2.26 | 2.55 |
| Water Absorption | % | 0 | 0 | 0 | 0 | 0.0-1.0 | 0 |
| Young's Modulus | Gpa | 280 | 350 | 205 | 295 | 670 | 65 |
| Vickers Hardness | Gpa | 14 | 20 | 12 | 18-20 | - | - |
| Flexural Strength @R.T. | Mpa | 280 | 300 | 900 | 650 | 51 | 100 |
| Compressive Strength @R.T. | Mpa | 2000 | 2500 | 2200 | 2200 | 230 | 500 |
| Thermal Conductivity @R.T. | W/(m*k) | 18-25 | 30 | 2.2 | 25 | 20 | 1.7 |
| Thermal shock resistance | Δ(℃) | 220 | 180-200 | 280-350 | 450-650 | >1500 | 25-100 |
| Max. Working Temperature @R.T. | ℃ | 1500 | 1700 | 850 | 1200 | 960 | 800 |
| Volume Resistivity @R.T. | Ω*cm | >10^15 | >10^14 | >10^12 | >10^14 | 10^13 | 10^16 |
Dielectric Constant (1 MHz @R.T. ) | - | 9.5 | 9.8 | 26 | 8.2 | 4.08 | 6.02 |
| Dielectric Strength | kV/mm | 16 | 22 | - | 16 | 375 | 40 |
Available Sizes
Diameter<150mm , Length<300mm
About UniPreTec
As a professional company in advanced ceramic industries, UNIPRETEC is manufacturing and supplying high quality and high precision ceramic components for clients from worldwide. Our ceramic products are widely used in various fields of automotive, metallurgy, machinery, electronic & electrical, food, chemical, medical and so on. With experienced engineers and talented workers, we are able to evaluate projects and drawings properly, make valuable suggestion, supply satisfying products.
Main materials we supply:
- Aluminium Oxide (Al2O3)
- Zirconium Oxide (ZrO2)
- Silicon Nitride (Si3N4)
- Boron Carbide (B4C)
- Hex Boron Nitride (hBN)
- Machinable Glass Ceramic
We offer customized production service,free quotation,free sample, any contact related to advanced ceramic products is welcome. If you need any further information, please do not hesitate to contact us at our office.
