Transparent Sapphire Tube 20×16×60 mm

Short Description:

Built for extreme environments, our transparent sapphire tube—OD 20 mm × ID 16 mm × L 60 mm—uses KY (Kyropoulos) grown single-crystal Al₂O₃ to deliver optical clarity with exceptional thermal, mechanical, and chemical robustness. Choose from customized tolerances, surface finishes, coatings, and crystal orientations to match your application.

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Features

Detailed Diagram

Overview

With Mohs 9 hardness (second only to diamond), the tube resists scratching and wear, preserving dimensional accuracy and surface quality under mechanical stress, particle erosion, and frequent handling. Sapphire’s high strength and chemical inertness ensure reliable service at elevated temperatures and resistance to acids, alkalis, and most organic solvents—ideal for demanding optical and process settings.

Common uses include optical instruments, chemical processing equipment, semiconductor tools, biomedical devices, and high-temperature furnaces, where consistent quality and uptime matter.

Key Properties

High Hardness & Wear Life
Mohs 9 hardness for excellent scratch/abrasion resistance; maintains finish in particulate flows and repeated cleaning.
Chemical Stability
Resists acids, alkalis, water, and most solvents to reduce corrosion, contamination, and maintenance.
High Temperature Capability
Melting point 2053 °C. Typical service: ~1600 °C in air; up to ~1900–2000 °C in inert gas/vacuum (application-dependent). Supports thermal cycling with controlled ramp rates.
Optical Clarity (UV–IR)
High transmission enables use as sight tubes, windows, and protective sleeves in optical/laser systems.
Dimensional Integrity
Precision grinding ensures tight OD/ID control, concentricity, and straightness over length.

Typical Specifications

Item	Parameter
Product	Transparent Sapphire Tube
Manufacturing Method	KY (Kyropoulos)
Nominal Size	OD 20 mm × ID 16 mm × L 60 mm
Standard Tolerances*	OD/ID ±0.05 mm (±0.02 mm on request); L ±0.20 mm (±0.05 mm on request)
Concentricity / Straightness*	≤0.05 mm / ≤0.05 mm per 60 mm
End Faces	Deburred chamfer; matte ground or optically polished
Optional Coatings	AR (custom bands), protective, anti-smudge
Crystal Structure	Hexagonal (α-Al₂O₃)
Density	3.97–3.98 g/cm³
Melting Point	2053 °C
Recommended Max Service Temp	~1600 °C (air); up to ~1900–2000 °C (inert/vacuum)**
Specific Heat (25 °C)	~0.75 J/(g·K)
Dielectric Strength	~48 MV/m
Dielectric Constant (20 °C)	~9.3 (at MHz)
Dielectric Loss (20 °C)	<1.4 × 10⁻⁴ (at MHz)
Volume Resistivity	>1.0 × 10¹⁴ Ω·cm (20 °C); ~1.0 × 10¹¹ Ω·cm (500 °C)

Applications

Laser Systems: Protective sleeves and sight tubes for high-power optics; stable under thermal loading.
Optical Instruments: Windows/tubes for spectrometers, cameras, and telescopes with minimal distortion.
Chemical Processing: Corrosion-resistant viewing/sampling tubes for aggressive media.
High-Temperature Furnaces: Sheaths for thermocouples/heaters; clear charge/flame observation.
Biomedical Devices: Biocompatible, corrosion-resistant housings and sleeves.
Semiconductor Manufacturing: Chemically inert, electrically insulating tubes for wafer/process tools.
R&D: Durable, transparent components for spectroscopy, materials testing, and high-T reactions.

FAQ

Q1: What tolerances are available?
A: Standard: OD/ID ±0.05 mm, L ±0.20 mm. Precision: OD/ID ±0.02 mm, L ±0.05 mm. Concentricity ≤0.05 mm and straightness ≤0.05 mm/60 mm available with precision grinding.

Q2: Can the ends be optically polished?
A: Yes—matte ground, single-side, or double-side optical polish (Ra ≤10 nm). Chamfers and deburring are standard.

Q3: Do you offer AR coatings? Which wavelengths?
A: Yes—single/multi-band AR from UV to IR (e.g., 355 nm, 532 nm, 633 nm, 1064 nm, 1550 nm). Protective/anti-smudge coatings available.

Q4: What is the usable temperature range?
A: Typically ~1600 °C in air; up to ~1900–2000 °C in inert/vacuum depending on design and duty. Melting point ~2053 °C.

Q5: How is thermal shock resistance?
A: Better than glass but still a brittle ceramic—use controlled ramp rates and avoid quenching. Limits depend on wall thickness and gradients.

Q6: Is it chemically resistant?
A: Yes—excellent resistance to acids, alkalis, water, and most solvents. Avoid hot hydrofluoric acid or strong molten alkalis/salts.

About Us

XKH specializes in high-tech development, production, and sales of special optical glass and new crystal materials. Our products serve optical electronics, consumer electronics, and the military. We offer Sapphire optical components, mobile phone lens covers, Ceramics, LT, Silicon Carbide SIC, Quartz, and semiconductor crystal wafers. With skilled expertise and cutting-edge equipment, we excel in non-standard product processing, aiming to be a leading optoelectronic materials high-tech enterprise.