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Custom Sapphire Tubes Semi-Polished Al₂O₃ Single Crystal for Optical Instruments

Sapphire thermocouple protection tube
September 03, 2025
Category Connection: Sapphire Parts
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Sapphire semi-polished tubes are typically manufactured from optical-grade sapphire (α-Al₂O₃ single crystal). They undergo preliminary polishing treatment, resulting in a surface quality that falls between rough-machined blank tubes and fully polished tubes with a mirror finish.
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#sapphire tube #sapphire bearings #sapphire windows
Brief: Discover the exceptional qualities of Custom Sapphire Tubes Semi-Polished Al₂O₃ Single Crystal for Optical Instruments. These tubes offer a balance between cost and performance, featuring high hardness, excellent optical properties, and superior thermal resistance. Ideal for semiconductor, optical, and industrial applications.
Related Product Features:
  • Extreme hardness with a Mohs rating of 9, second only to diamond, ensuring high wear resistance.
  • Excellent optical properties with light transmission from 200 nm to 5500 nm, covering UV, visible, and near-infrared spectra.
  • High temperature resistance up to 1900°C, suitable for extreme environments.
  • Strong chemical stability, resistant to most acids and alkalis.
  • Semi-polished surface reduces the need for additional processing, offering a cost-effective solution.
  • Widely used in semiconductor, optical instruments, industrial equipment, and research applications.
  • Customizable dimensions and tolerances to meet specific application requirements.
  • Surface quality between rough-machined and fully polished, allowing for further fine polishing if needed.
Faqs:
  • What is a semi-polished sapphire tube?
    A semi-polished sapphire tube is made from optical-grade α-Al₂O₃ single crystal, featuring a surface finish between rough-machined and fully polished states, achieved through preliminary polishing steps to improve smoothness while remaining cost-effective.
  • What are the key advantages of semi-polished sapphire tubes?
    They offer high hardness (Mohs 9), excellent optical transmission from UV to NIR (200-5500 nm), and superior chemical/thermal resistance (up to 1900°C), making them ideal for optical instruments, semiconductor equipment, and high-temperature viewports.
  • What are the typical applications of semi-polished sapphire tubes?
    They are widely used in the semiconductor industry, optical instruments, industrial equipment, and research applications, including high-temperature furnace tubes, infrared/UV windows, and sensor protection tubes.
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