Sapphire glass
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Sapphire glass

Introduction to Industrial Sapphire Glass and Our Capabilities
Sapphire glass, a crystalline form of aluminum oxide (Al₂O₃), is renowned for its exceptional properties, making it indispensable across various high-tech industries. Unlike naturally occurring gemstones, industrial sapphire glass is synthetically produced to meet the rigorous demands of modern technological applications. It is highly valued for its outstanding hardness, transparency, and resistance to chemical and thermal stresses.

Properties of Sapphire Glass
Hardness: Second only to diamond, sapphire glass scores a 9 on the Mohs scale, making it extremely resistant to scratching and abrasion, ideal for durable applications.
Transparency: With excellent optical clarity and a broad transmission range from ultraviolet (150 nm) to infrared (5,500 nm), sapphire glass is perfect for high-performance optical applications.
Chemical Resistance: Chemically inert, sapphire glass is resistant to most acids and alkalis, suitable for harsh chemical environments.
Thermal Stability: Capable of withstanding temperatures up to 2,000°C with a low thermal expansion coefficient, ensuring performance under extreme conditions.
Electrical Insulation: An excellent electrical insulator, beneficial for electronic applications requiring both transparency and insulation.
Physical
Chemical formula Al2O3
Density 3.97 g/cm3
Hardness 9 Mohs
Melting point 2050oC
Max. use temperature 1800-1900oC
Mechanical
Tensile strength 250-400 MPa
Compressive strength 2000 MPa
Poisson's ratio 0.25-0.30
Young's Modulus 350-400 GPa
Bending strength 450-860 MPa
Rapture Modulus 350-690 MPa
Thermal
Linear expansion rate (at 293-323 K) 5.0*10-6K-1(⊥ C)
6.6*10-6K-1(II C)
Thermal conductivity (at 298 K) 30.3 W/(m*K)(⊥ C)
32.5 W/(m*K)(IIC)
Specific heat (at 298 K) 0.10 cal*g-1
Electrical
Resistivity (at 298 K) 5.0*1018 Ω*cm(⊥ C)
1.3-2.9*1019 Ω*cm(II C)
Dielectric constant (at 298 K, in 103-109 Hz interval) 9.3 (⊥ C)
11.5 (II C)

Applications of Sapphire Glass
1. Optics and Photonics: Used in lenses, windows, and other components for high-performance cameras, scientific instruments, and lasers.
2. Aerospace and Defense: Ideal for cockpit windows, sensor covers, and infrared optical systems due to its robustness and ability to endure extreme conditions.
3. Consumer Electronics: Employed in scratch-resistant screens for smartphones, watches, and other portable devices, offering durability and longevity.
4. Medical Devices: Used for surgical tools, endoscopes, and implantable devices due to its biocompatibility, transparency, and durability.
5. Semiconductor Industry: Utilized in LED light production and as insulating layers in integrated circuits, leveraging its thermal stability and insulating properties.

Our Comprehensive Manufacturing Capabilities
Our company offers a wide range of sapphire and optical component customization, ensuring a stable and large-scale supply to meet diverse customer needs. We possess a complete set of precision manufacturing processes, including grinding, slicing, polishing, edging, orientation, and polishing.

Main Processed Products
1. Sapphire Windows: Highly transparent and durable for various optical applications.
2. Custom Sapphire Shapes: Tailored shapes for specific industrial uses.
3. Sapphire Lenses: Used in high-precision optical devices.
4. Aspherical Sapphire Lenses: Provide superior optical performance.
5. Sapphire Prisms: Essential for various optical applications.
6. Sapphire Tubes: Used in harsh environments due to their durability.
7. Sapphire Components with Holes: For specialized industrial uses.
8. Large Sapphire Elements: For applications requiring significant size and durability.
Specification of Sapphire Window
Diameter 0.2-300mm
Thickness 0.1-100mm
Dimension tolerance +/-0.1mm or +/-0.02mm
Surface quality (scratch & dig) 60/40, 40/20 or better
Clear aperture >85%, >90%
Surface accuracy λ/10 λ/2
Parallelism +/-3' ,+/-30''
Bevel 0.1~0.3mm x 45 degree
Coating AR, BBAR or Custom
Shape Round, square, rectangle; flat, dome, curve, bridge ,pot Cover shape, etc.
Hardness (Knoop) 1370 kg mm-2
Young's modulus 3.4 x 1011 N m-2
Thermal Limit 22 W m-1 K-1
Thermal expansion coefficient 8.4 x 10-6 K-1

Advanced Production Equipment and End-to-End Capabilities
We are equipped with a full front-end processing production line, including multi-wire saws, grinders, surface grinders, cylindrical grinders, and X-ray orientation instruments. This equipment allows us to meet the processing requirements from raw sapphire material to finished products.
Our comprehensive production process includes material orientation, cutting, shaping, slicing, grinding, chamfering, precision carving, fine grinding, polishing, and cleaning and inspection. Supported by a highly experienced engineering team and advanced testing equipment, we can produce customized non-standard products according to specific customer needs.

Applications of Sapphire Crystals
Sapphire crystals are widely used in science and technology, defense, civil industries, and various fields of electronic technology. Applications include:

1. Infrared Window Materials: For high-performance optical systems.
2. Microelectronics Substrates: Used as base substrates in the semiconductor industry.
3. Laser Host Materials: Essential for high-precision laser systems.
4. Optical Components: Widely used in various optical applications.

Market Demand and Future Trends
Sapphire boules are foundational for LED lighting, and raw sapphire stones are often processed into jewelry. As aircraft technology evolves towards faster, smarter, and multifunctional designs, the demand for large-size optical-grade sapphire crystals in civil aviation is significant. This includes key window materials such as radar windows, optoelectronic windows, combined optical windows, and electro-optical pods.

Future developments in medical instruments, environmental equipment, laser devices, chemical equipment, high-vacuum testing devices, textile industry fiber spinnerets, barcode scanner windows, next-generation smartphone windows, optoelectronic remote control windows, camera protective lenses, projector protection prisms, wear-resistant bearings, and high-end watch covers will further increase the market demand for sapphire windows in civilian fields.

Conclusion
Sapphire glass is a versatile and essential material across numerous high-tech industries. Its exceptional physical and chemical properties make it ideal for demanding applications. Our company is committed to providing high-quality, customized sapphire and optical components, supporting innovation and industrial development. As technology advances, the role of sapphire glass will continue to expand, driving progress across various fields.

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Add：Pingming Town Resident Industrial Park, Donghai County, Lianyungang City, Jiangsu Province