Material Sapphire(Al2O3)

Density(20°C) Kg/M3 3.98×103

Crystal Structure Hexagonal

Crystal Lattice Constant A=4.785Å C=12.991 Å

Mohs Hardness 9

Melting Point 2045°C

Boiling Point 3000°C

Coefficient Of Thermal Expansion Α=5.8×10 -6 /K

Specific Heat 0.418W.S/G/K

Thermal Conductio 25.12W/M/K(@100°C)

Refractive Index (Nd) No=1.768Ne=1.76

Dn/Dt 13×10-6/K(@633Nm)

Tranmission T≈85%(0.3~5Um)

Permittivity 11.5(//C), 9.3(⊥C)

Sapphire Washers, Sapphire Windows, Sapphire Bearings, Sapphire Rods, Sapphire Tubes, Ruby

Sapphire Wafer, Dome Sapphire, Sapphire Insulation Film, Sapphire Ball Lens, Sapphire/Ruby Ball

Synthetic sapphire—sometimes referred to as sapphire glass—is commonly used as a window material, because it is both highly transparent to wavelengths of light between 150 nm (UV) and 5500 nm (IR) (the visible spectrum extends about 380 nm to 750 nm, and extraordinarily scratch-resistant.

The key benefits of sapphire windows are:

Very wide optical transmission band from UV to near-infrared, (0.15–5.5 µm)
Significantly stronger than other optical materials or standard glass windows
Highly resistant to scratching and abrasion
Extremely high melting temperature (2030 °C)

• LED Manufacturing:

  • Blue and UV LEDs: Sapphire wafers serve as the primary substrate for the growth of gallium nitride (GaN) layers used in blue and UV LED production. Their high thermal conductivity and wide bandgap make them ideal for efficient light emission.

• RF Devices:

  • High-Frequency Components: Sapphire wafers are used in the fabrication of RF devices, including amplifiers and oscillators. Their excellent dielectric properties ensure high performance in wireless communication applications.

• Optical Devices:

  • Laser Diodes: Sapphire wafers are employed as substrates for laser diodes, particularly in applications requiring high power and efficiency, such as industrial laser systems.
  • Optical Coatings: The transparency of sapphire wafers in the visible and near-infrared ranges allows for various optical coatings, enhancing performance in lenses and windows.

• Microelectronic Applications:

  • Integrated Circuits: Sapphire wafers are used as substrates for the growth of various semiconductor materials, providing a stable platform for the fabrication of integrated circuits (ICs) in high-performance electronics.

• High-Temperature and Harsh Environment Applications:

  • Aerospace and Defense: The robustness of sapphire wafers makes them suitable for devices operating in extreme conditions, such as those found in aerospace and military applications.

• Sensors:

  • Pressure and Temperature Sensors: Sapphire wafers are utilized in the development of high-performance sensors due to their excellent mechanical properties and stability under varying conditions.

• Research and Development:

  • Material Science: Sapphire wafers are extensively used in R&D for studying crystal growth, material properties, and developing new semiconductor technologies.
  • Prototype Fabrication: Researchers use sapphire wafers to fabricate prototypes of new devices, allowing for innovation in various technological fields.

2. Sapphire Produce step:

crystal body--->get rough ingot incustomized axis--->cut tail＆ top off---->repair diameter shape----> Grind OF surface--->( anneal -->)wire cut--->chamfer-->anneal--->lapped---polished---infection