Glassy Carbon is a type of highly impermeable carbon, with the appearance of glass and having unique properties not found in carbon and graphite materials. It has an amorphous structure, does not generate particles and is impervious to gases.
Tokai Carbon Group was the first carbon company to develop this material using some innovative methods and materials.
Features:
Applications:
Typical Properties of Glassy Carbon
| Density (g/cm³) | Specific Resistance (µΩm) | Flexural Strength (MPa) | Hardness (Shore) | Thermal Conductivity (W/mK) | Ash Content(ppm) |
| 1.51 | 42 | 147 | 120 | 5.8 | <2 |
Typical Impurities Analysis
| Al | Ca | Cr | Cu | Fe | K | Na | Ni | Ti | V | |
| ppm | <0.08 | <0.04 | <0.17 | <0.08 | <0.04 | <0.1 | <0.05 | <0.1 | <0.09 | <0.07 |
Material Comparison
Glassy Carbon (GC) has an amorphous structure which combines both the characters of Carbon and Glass
| Isotropic Graphite | Glassy Carbon | Quartz Glass | |
| Thermal Resistance | Excellent | Good | |
| Electrical Conductivity | High | None | |
| Thermal Expansion | More than Quartz | Small | |
| Thermal Conductivity | High | Low | |
| Particle Generation | Yes | None | |
| Permeable to Gases | Yes | No | |
| Dimensional Tolerances (mm) | |||||
| Forms | I.Dia | O.Dia | L, H. | Thickness | |
| Rods | RA-3 | ±0.3 | ±1 | ||
| Others | ±0.4 | ±1 | |||
| Plates | ±0.3 | ±0.2 | |||
| Disks | ±0.2 | ±0.2 | |||
| Crucibles | C-30, 40 | ±1 | ±1 | ±2 | |
| Others | ±2 | ±2 | ±3 | ||
| Pipes | ±0.5 | ±0.5 | ±1 | ||
| With Lid Tubes | ±0.5 | ±0.5 | ±1 | ||
| Shape | Type | Size (mm) | ||
| (non-standard) | ø | Length/Height | ||
| External | Internal | |||
| Rods | (Ra2xL100) | 2 | 100 | |
| (Ra3xL10) | 3 | 100 | ||
| (Ra3xL50) | 3 | 50 | ||
| (Ra3×L100) | 3 | 100 | ||
| Ra3×L300 | 3 | 300 | ||
| （Ra5×L100） | 5.2 | 100 | ||
| Ra5×L500 | 5.2 | 500 | ||
| (Ra6×L100) | 6 | 100 | ||
| (Ra6×L300) | 6 | 300 | ||
| Ra6×L500 | 6 | 500 | ||
| Ra8×L100 | 8 | 100 | ||
| Ra10×L100 | 10 | 100 | ||
| Crucibles | C-1 | 10 | 8 | 10 |
| C-4 | 20 | 16 | 30 | |
| C-30 | 40 | 36 | 40 | |
| C-40 | 45 | 41 | 43 | |
| (C-150) | 65 | 61 | 61 | |
| Shape | Type | Size (mm) | ||
| (non-standard) | ø | Length/Height | ||
| External | Internal | |||
| Pipes | P5×L500 | 7 | 5 | 500 |
| (P6×L100) | 8 | 6 | 100 | |
| P6×L500 | 8 | 6 | 500 | |
| (P10×L100) | 13 | 10 | 100 | |
| P10×L500 | 13 | 10 | 500 | |
| (P16×L100) | 20 | 16 | 100 | |
| P16×L500 | 20 | 16 | 500 | |
| With Lid Tubes | PP5×L500 | 7 | 5 | 500 |
| (PP6×L100) | 8 | 6 | 100 | |
| PP6×L500 | 8 | 6 | 500 | |
| (PP10×L100) | 13 | 10 | 100 | |
| PP10×L500 | 13 | 10 | 500 | |
| (PP16×L100) | 20 | 16 | 100 | |
| PP16×L500 | 20 | 16 | 500 | |
| Shape | Type | Size (mm) | ||
| (non-standard) | Length | Width | Thickness | |
| Plates | SA-1 | 100 | 100 | 1 |
| (SA-2) | 100 | 100 | 2 | |
| SA-3 | 100 | 100 | 3 | |
| (SA-6) | 100 | 100 | 6 | |
| (SD-3) | 200 | 200 | 3 | |
| (SD-6) | 200 | 200 | 6 | |
| (SD-6) | 300 | 300 | 6 | |
