Introduction of Sapphire Green Color
Sapphire Green color crystal is a single crystal.
It's a kind of Corundum, also known as Al2O3.
Sapphire Green color crystal is a favored material for high-performance system and component designs due to its favorable chemical, electrical, mechanical, optical, surface, thermal, and durability qualities.
In comparison to other synthetic single-crystals, sapphire green color crystal is the greatest choice for a variety of semiconductor applications.
Sapphire Green color Growth-Czochralski Method
The Czochralski process (Cz) is the most widely used method for manufacturing large single crystals, such as sapphire green color crystal, for use in electrical and optical components.
This technique is commonly used to generate semiconducting material crystals.
The crystal's shape is no longer constrained by the shape of the crucible.
The charge is melted and kept at a temperature just above the sapphire melting point in this procedure.
The pulling rod is lowered until it comes into contact with the melt.
Melt happens at the pointed tip of the pulling rod because the rod is at a lower temperature.
The crystal is slowly drawn.
The pulling rate is affected by parameters such as thermal conductivity, the latent heat of fusion of the charge, and the cooling rate of the pulling rod.
To keep the grow crystal regular and cylindrical, the seed is rotated.
Benefits of Using the Czochralski Method
This technique is used to create enormous single crystals.
There is no direct contact between the crucible walls and the crystal, which aids in the formation of a single, unstressed crystal.
| Properties of Synthetic Sapphire | |
| Synthetic Sapphire | corundum single crystal |
| Crystal System | Hexagonal |
| Chemical formula | Al2O3, |
| Cleavage | Conchoidal |
| Specific gravity | 3.99 ÷ 3.98 |
| Lattice | a=4.785Å, C=12.991Å |
| Density | 3.98g-4.10g/cm3 |
| Purity | 99.99% |
| Transmission Range | 170-6500nm, >80% in IR range |
| Melting Point | 2040°C |
| Softenig Point | 1800°C |
| Specific Heat | 0.418 W.s/g/K |
| Thermal Conductivity | 25.12 W/m/K |
| Thermal Shock Resistance | 790 W/m |
| Thermal Expansion Coefficient | 5.8x10-6/K |
| Chemical Resistance | unattacked by common acids or NaOH |
| acids and alkalis attack at 300°C | 0 |
| Dielectric Constant | 11.5°C (Parallel to the c-axis) 103-1010Hz 25 |
| Hardness | 9 Mohs |
| Refractive Index | 1.83 @0.26 m, 1.76 @0.63 m, 1.58 @5.57 m |
Applications of Synthetic Sapphire
| Sapphire substrates | Silicon on sapphire wafers |
| Superconductor substrate,LED,Transparent electronic substrate | |
| IR Detectors | |
| Watch Industry | Sapphire Watch glasses, watch cases, and gauge |
| Analytical applications | UV and IR Optics- as infrared filters in military and industrial application |
| NMR (Nuclear Magnetic Resonance) tubes | |
| Analytical chemistry - for mass spectroscopy, ICAP, and other systems | |
| Sample preparation | |
| Medical applications:
| Endoscope lenses |
| Sapphire knives | |
| Surgical tips | |
| Aerospace | FLIR(Forward Looking Infra Red) windows for sensors and other optics; |
| Windows for erosion resistance in salt and blowing sand environments | |
| Countermeasures lamps: sapphire flash lamps are used in IRCM's (Infra red countermeasures) | |
| Optical applications | High temperature and pressure windows |
| Illumination windows | |
| Sapphire light guides - sapphire rods | |
| Optical components: lenses, prisms and other laser and infrared optics | |
| Jewelry | Sapphire Necklace, rings, earrings,brace lace |
Our advantage:
The topped company in color sapphire boule growth by CZ method.
A team with 30 years of sapphire material processing experience.
