​​Custom Optical-Grade Sapphire Tube OD 2mm×ID1.6mm×L 6mm High Environmental Resistance​​

​​Custom Optical-Grade Sapphire Tube OD 2mm×ID1.6mm×L 6mm High Environmental Resistance​​

This ​​Sapphire Tube​​ with dimensions of ​​outer diameter (OD) 2mm × inner diameter (ID) 1.6mm × length (L) 6mm​​ is a ​​miniaturized, high-precision, and high-performance ceramic tubular component​​ manufactured from ​​ultra-high-purity single-crystal aluminum oxide (α-Al₂O₃)​​ through precision machining. It is specifically designed for ​​cutting-edge technological fields​​ with extreme requirements for ​​size, accuracy, reliability, and tolerance to harsh environments​​.

Due to its ​​extremely small size​​ (categorized as an ultra-fine precision tube), its production and quality control are highly challenging, typically requiring ​​ultra-precision machining technologies​​ (e.g., laser processing, ultrasonic grinding, diamond wire cutting) to achieve.

Sapphire Tube Feature

Leveraging its miniature size and the intrinsic properties of sapphire, it offers the following core advantages:

• ​​Extreme Dimensional Accuracy and Stability​​: Sapphire’s ​​high elastic modulus (~400 GPa)​​ and ​​low coefficient of thermal expansion​​ ensure that this micro-tube ​​highly resists bending or deformation​​ under mechanical stress or temperature fluctuations, maintaining dimensional stability.
• ​​Exceptional Durability​​: With a ​​Mohs hardness of 9​​ (second only to diamond), it is extremely ​​wear-resistant and scratch-resistant​​, ensuring a long service life.
• ​​Outstanding Chemical Inertness and Corrosion Resistance​​: It can ​​withstand erosion from most strong acids, alkalis, and plasmas​​, making it suitable for demanding chemical environments.
• ​​Excellent Thermal Performance​​: It ​​withstands high temperatures (melting point up to 2040°C)​​ and exhibits good thermal conductivity, enabling operation in high-temperature scenarios.
• ​​Good Optical Properties​​: It offers ​​high transmittance​​ in specific bands (e.g., UV, visible, IR), and its surface can be polished to achieve ​​extremely low roughness​​, suitable for certain optical applications.

Sapphire Tube Application

Sapphire Tube Key Parameter

​​Parameter Category​​	​​Parameter Name​​	​​Typical Value/Notes​​
​​Material Characteristics​​	Primary Material	Single-crystal aluminum oxide (α-Al₂O₃)
	Crystal Structure	Hexagonal system
	Density	~3.98 g/cm³
	Mohs Hardness	9
	Melting Point	~2040 °C
​​Dimensional Specifications​​	Outer Diameter (OD)	2 mm
	Inner Diameter (ID)	1.6 mm
	Length (L)	6 mm
	Wall Thickness	0.2 mm
​​Functional Characteristics​​	Surface Finish	Can be polished to optical grade
	Pressure Resistance	Relatively high (specific value highly depends on size and wall thickness)
	Operating Temperature	-200°C ~ +1500°C (short-term)

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ZMSH's Sapphire Tube Products

1. Custom 140mm Double-Side Polished Sapphire Tubes Optical Component Protection Tubes

2. Polished Sapphire Tube Single Crystal Al₂O₃ Optical Component

1. Q: What are the key advantages of sapphire tubes over other materials like quartz?​​

A: Sapphire tubes offer superior ​​hardness (Mohs 9), exceptional thermal stability (withstanding temperatures up to 2040°C), and excellent chemical inertness​​, making them far more durable and reliable in high-temperature, high-pressure, or corrosive environments than quartz or alumina tubes.

​​2. Q: In what applications are sapphire tubes most critical?​​

A: They are essential in ​​high-pressure NMR spectroscopy, semiconductor processing equipment, and as protective sheaths for sensors​​ in harsh conditions, where their stability ensures precision and longevity.

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