Sapphire Block Al₂O₃ Precision Cutting Customizable Sizes for Optics & Semiconductors

Product Overview

ZMSH Sapphire Block is a high-purity single-crystal Al₂O₃ material, widely used in high-end applications such as laser optics, semiconductor manufacturing, aerospace, and medical devices. With its extreme hardness, superior optical transparency, and excellent thermal and chemical stability, this sapphire block is ideal for precision engineering, providing a reliable and durable solution in demanding environments. We offer customizable sizes and surface treatments to meet the specific needs of our customers.

Key Features

• Extreme Hardness: With a Mohs hardness of 9, just below diamond, sapphire exhibits superior scratch resistance, making it ideal for harsh environments and high-durability applications.

• Excellent Optical Properties: Sapphire blocks offer transmission across a wide range from 0.15–5.5μm (UV to mid-IR), with low birefringence (Δn≈0.008), making them suitable for laser windows, optical lenses, and infrared applications.

• Thermal Stability: Sapphire boasts an impressive melting point of 2053°C and a thermal conductivity range of 35-40W/(m·K), allowing it to withstand extreme temperature variations, ideal for high-temperature environments.

• Chemical Inertness: Highly resistant to most acids and alkalis (except hydrofluoric acid and hot concentrated sulfuric acid), sapphire blocks show excellent chemical inertness, making them suitable for use in aggressive chemical environments.

• Mechanical Strength: Sapphire blocks have a compressive strength of >2 GPa and a Young’s modulus of 345 GPa, providing excellent durability and stability for precision machining and heavy-duty applications.

Technical Specifications

Applications

• Laser Optics: Sapphire blocks are used for high-power CO₂ laser transmission windows (10.6μm band), offering excellent resistance to high temperatures and laser damage.

• Semiconductor Industry: Sapphire is a primary substrate for GaN-based LED epitaxial growth and is used in RF devices. It is also employed in wafer processing as a carrier for semiconductor polishing.

• Aerospace & Defense: Sapphire blocks are utilized for missile radomes, infrared windows, electro-optical pods, and other critical aerospace components, where durability against extreme conditions such as high speed, high temperature, and rain erosion is required.

• Medical Devices: Sapphire’s resistance to high temperatures and chemical stability makes it suitable for protective lenses in medical equipment like endoscopes, which undergo high-temperature sterilization.

• Industrial and Research Applications: Used as high-pressure windows in experiments (e.g., diamond anvil cell), precision instrument bearings, and substrates for scientific instruments.

• Specialized Equipment: Sapphire blocks are also applied in spacecraft windows due to their resistance to micrometeoroid impacts and UV radiation in space.

Customization Services

• Size Customization: We provide sapphire blocks in various sizes. Custom sizes are available upon request to meet specific project requirements.

• Precision Cutting: We offer precision cutting with a minimum kerf of ≤50μm to achieve highly accurate dimensions.

• Surface Treatment: Choose from optical-grade polishing (Ra ≤ 5nm) or ground surface suitable for mechanical applications.

• Crystal Orientation: Available in custom orientations, including C-plane, A-plane, and R-plane, with an accuracy of ±0.5°.

• Coating Services: We offer coatings such as anti-reflection (AR) coatings, laser damage-resistant coatings, and others based on your specific needs.

ZMSH Service Commitment

As a leading sapphire material supplier, ZMSH not only offers standard sapphire blocks but also provides customized processing services including precision cutting, ultra-precision polishing, and coatings. With over a decade of experience in sapphire material R&D and processing, we use advanced inspection equipment (e.g., interferometers, spectrophotometers) to ensure that every sapphire block meets stringent military-grade and electronic-grade standards. Whether you need small-scale research samples or large industrial orders, we offer professional technical support, fast sample delivery, and reliable long-term supply.

Q&A

1.Q: What are the main applications of sapphire blocks?

A: Sapphire blocks are widely used in laser optics, semiconductor substrates, aerospace components, and medical devices due to their extreme hardness, high optical transparency, and outstanding thermal and chemical stability.

2.Q: Why is synthetic sapphire preferred over natural sapphire for industrial use?

A: Synthetic sapphire offers superior purity, consistent quality, and customizable properties, making it more reliable for precision engineering applications compared to natural sapphire, which may have internal defects and impurities.

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