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Ciso Tool
Ciso Tool
| Product Name | Sapphire Crystal Watch Back Cover |
| Size | Customized size (length, width, functional chamfers, edge protection chamfers) |
| Thickness | Customized thickness |
| Crystal structure | Hexagonal lattice a=4.76A c=12.99A |
| Melting point | 2053 ℃ |
| Density | 3.98 g/cm³ |
| Hardness | 9 (mohs) |
| Purity | >99.996% |
| Linear thermal expansion coefficient | 6.7*10-6/℃ (5.0*10-6/℃ Perpendicular to C-axis) |
| Refractive index | 1.762-1.770 |
| Infrared ray transmittance | ≥ 85% |
| Heat capacity | 0.10 (cal/℃) |
| Birefringence | 0.008-0.010 |
| Thermal conductivity | 46.06@0℃, 25.12@100℃, 12.56@400℃ (W/(m.k)) |
| Dielectric constant | 9.4@300K A ~ 11.58@300K C |
