描述
Product Overview
The Sapphire Thermocouple Tube is a high-performance thermocouple protection sheath made from single crystal sapphire (Al₂O₃). Produced using advanced EFG/KY growth methods, it is a one-piece, dense crystal tube designed to withstand extreme temperature, pressure, and chemical exposure.
It is an ideal replacement for traditional corundum or ceramic tubes, offering superior reliability, extended thermocouple lifespan, and stable performance in harsh industrial and laboratory conditions.
Key Features
Exceptional Thermal Resistance
Can operate reliably up to 2000 °C, with a melting point of 2030 °C, maintaining shape and mechanical properties even in extreme high-temperature environments.Outstanding Chemical and Corrosion Resistance
Resistant to acids, alkalis, molten metals, and reactive gases, preventing damage to thermocouples.High Mechanical Strength
Mohs hardness of 9, providing excellent wear resistance and protection against mechanical stress, pressure, and impact.100% Gas Tightness
Fully dense single crystal structure prevents gas infiltration and ensures environmental isolation.Superior Electrical Insulation
Maintains dielectric strength at high temperatures, suitable for electrically sensitive measurements.Ultra-High Purity
Purity up to 99.995, ensuring stable performance and minimal contamination risk.
Typical Specifications
| Parameter | Specification |
|---|---|
| Material | Single Crystal Sapphire (Al₂O₃) |
| Inner Diameter | 15 mm |
| Outer Diameter | 18 mm |
| Length | 280 mm |
| Dimensional Tolerance | ±0.05 mm |
| Concentricity | ±0.05 mm |
| Surface Finish | As-grown |
| Maximum Operating Temperature | ≤ 2000 °C |
| Gas Tightness | 100% |
Customizable Options: Inner/outer diameter, length, end shapes, and surface finish can be tailored to your specific application requirements.
Applications
High-temperature vacuum and tube furnaces
Single crystal growth furnaces (sapphire, SiC, oxides)
Semiconductor research and materials laboratories
Chemical reactors and corrosive process environments
Glass melting and blast furnaces
Metallurgical temperature monitoring
Hydrogen production and high-pressure measurement setups
Sapphire thermocouple tubes are particularly suitable for environments where ceramic or corundum tubes fail due to chemical reactions, porosity, or high-temperature deformation.
Frequently Asked Questions (FAQs)
Frequently Asked Questions (FAQs)Q1: What makes sapphire thermocouple tubes better than ceramic tubes?
Sapphire tubes provide higher temperature tolerance, chemical inertness, full gas tightness, and mechanical durability, outperforming standard ceramic or corundum protection tubes in extreme conditions.
Q2: Can the sapphire thermocouple tube be used in corrosive chemical processes?
Yes. Its exceptional chemical stability allows use in acids, alkalis, molten metals, and reactive gases without compromising the thermocouple.
Q3: Is customization available for sapphire thermocouple tubes?
Absolutely. Tubes can be customized for length, inner/outer diameter, end geometry, and surface finish to match your furnace or measurement setup.
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