Technical Data VITRONIT® Machinable Glass Ceramic
VITRONIT® machinable glass ceramic is white and airtight. You can use conventional metal working tools to machine it very precisely into complicated shapes at an attractive price even for small quantities. No post-firing is required after the machining stage.
This material combines the excellent properties of ceramics with the exquisite machinability of metals, offering you manufacturing and application options adapted to your individual requirements.
VITRONIT® -
Structural properties
| Density | 2,66 g/cm3 | |
| Porosity | 0 | |
| Degasification | 0 | |
| Water absorption | 0 | |
| Thermal expansion coefficient: | 20 – 400°C | 9,5x10-6K-1 |
| 20 – 600°C | 10,3x10-6K-1 | |
| 20 – 800°C | 11,3x10-6K-1 | |
| Maximum operating temperature | 1000°C | |
| Maximum working temperature | 700°C | |
| Thermal conductivity | 25°C | 1,72 W/mK |
| Specific heat | 25°C | 789 J/kgK |
Electrical properties
| Dielectric strength DIN VDE 0335 T.2:1988-02/Abschn. 12 (IEC 243) |
12 kV/mm | |
| Specific volume resistivity DIN VDE 0303T.32:1996-08 (IEC 345) |
4x1012 Ohmcm | |
| Dielectric constant | 20°C, 1MHz | 14 |
| Dielectric loss factor | 50°C, 1kHz | 0,022 |
Mechanical properties
| Transverse rupture strength | 120MPa |
| Young's modulus | 74,5Gpa |
| Shear modulus | 29Gpa |
| Poisson's ratio | 0,24 |
| Compressive strength | 450MPa |
Chemical properties
| Hydrolytic resistance class | DIN 12111 | 2 |
| Acid class | DIN 12116 | 3 |
| Alkaline solution class | DIN 52322 | 1 |
Additional information
| Lathing | Cutting speed | 30-50 | mmin-1 |
| Fz | 0.05 – 0,2 | mm | |
| Cutting | Cutting speed | 10-20 | mmin-1 |
| Fz | 0,01 – 0,05 | mm | |
| Machining cooling water solution | Emulsion | ||
| Sub-assemblies | Rods | ||
| Discs | |||
| Bars | |||
| size/dimensions | max. | 250 mm |
