Glass-like carbon coat (AC Coat)
Glass-like carbon coat (AC Coat) is a technique to make the combination of graphite particle secure and cover the surface of graphite by glass like carbon. Particular resin is soaked and coated on graphite base materials and it transformed to Glass-like carbon by carbonization. Soaking treatment for infiltrating and Coating treatment for closing surface pores are available.
Images of Glass like carbon Coat
Features
- AC Coat prevents scattering dust from graphite material.
- AC Coat prevents discharging gas from graphite material.
- AC Coat prevents gas penetration into graphite material.
- AC Coat can infiltrate into graphite material.
- AC Coat prevents graphite material from reaction to metal or glass.
- AC Coat is applicable to graphite products of various shapes.
Properties
| Item | Unit | Base graphite material density |
Before treatment |
Soaking treatment |
Soaking & Coating treatment |
|---|---|---|---|---|---|
| Thickness of Glass-like carbon layer | µm | 1.8 | – | <1 | 2∼3 |
| In filtrated depth | µm | 1.8 | – | ≧1200 | ≧1000 |
| Gas impermeability | m3(STP) m-2min-1 MPa-1 |
1.7 | 9 | 9 | 9×10-1 |
| 1.8 | 3 | 1 | 1×10-1 | ||
| 2.0 | 1×10-1 | 4×10-1 | 4×10-6 | ||
| Flexural strength | MPa | 1.8 | 38 | 42 | 46 |
| 2.0 | 78 | 82 | 98 | ||
| Elastic modulus | GPa | 1.8 | 6.6 | 8.3 | 9.1 |
| 2.0 | 11.6 | 13.6 | 13.6 |
- Prevention of graphite particle
* Testing Method
5 minutes Ultrasonic treatment in
filtered water was given to samples. Then, particles in the water were counted by particle counter.
- Gas impermeability
Application
- Crucibles for deposition
- Jigs for electrical parts assembly
- Jigs for semiconductor, PV cell and FPD manufacturing
- Parts to be used at high temperature and in vacuum environment
- Particle decreasing for graphite parts
- Jigs for hermetic seal