Single crystal sapphire possesses excellent optical, physical and chemical properties. It is the hardest oxide crystals, and remains high strength and chemical resistance at high temperatures. It also features a wide transmission wavelength range, great electrical insulation, and good thermal conductivity at low temperatures.
This glass tube is made of sapphire crystal that has a hardness that ranks nine out of ten in the Mohs scale, making it the hardest material second to diamond. It is also designed to be anti-impact, anti-scratch. The sapphire crystal glass tube is great for repairs and replacements for machinery components, optical equipment and electronic parts.
● A premium-quality sapphire glass tube
● An anti-impact and anti-scratch design.
● With high electrical resistance.
● Features a high optical production rate.
● With good thermal stability.
● Features a high melting temperature of 2030 °C.
● With a high hardness of 9 Mohs, which is second to diamond.
● Purity: 99.99%.
● Density: 3.98-4.1g/cm2.
● Compressive strength: 21000kg/cm2.
● Flexural strength: 4000kg/cm2.
● Infrared transmittance: 85%.
● Dielectric constant: 7.5 - 10.5.
● Place of origin: China.
● Color: transparent or custom-made.
● Available in customized designs.
| Sapphire pipe fitting (one end sealing pipe fitting is available) | ||
| Outside diameter | Wall thickness | Length |
| 5～10mm | 1～4mm | 0～1400mm |
| 20～30mm | 1～10mm | 0～1400mm |
| 30～50mm | 1～15mm | 0～1400mm |
| 50～70mm | 1～15mm | 0～400mm |
| 1～3mm | 0.3～1mm(inner diameter) | 0～150mm |
| Materials characteristic | |
| Refractive index(nd) | 1.768 |
| Coefficient of dispersion(Vd) | 72.2 |
| Density（g/cm³） | 3.97 |
| TCE（μm/m℃） | 5.3 |
| Soften Temperature(℃) | 2000 |
| Knoop hardness(kg/mm2) | 2000 |
| Diamete | 1-35mm |
| Diameter tolerance | +/-0.1mm or +/-0.02mm |
| Thickness | 0.10-100mm |
| Thickness tolerance | ± 0.1mm or +/-0.02mm |
| Surface quality (scratch & dig) | 60/40, 40/20 or better |
| Surface accuracy | λ/10, λ/2, λ |
| Clear Aperture | >85%, >90% |
| Parallelism | +/-3' ,+/-30'' |
| Bevel | 0.1~0.3mm×45 degree |
| Coating | AR, BBAR or upon customer request (UV, VIS, IR) |
☆ Material
Sapphire, quartz glass, optical glass, etc. can be selected according to requirements.
☆ Order goods
Other specifications and precision products can be processed according to customer needs.