Description of 2N5 LaB6 Lanthanum Hexaboride Tube

2N5 LaB6 Lanthanum Hexaboride Tube is designed for electron emission systems that require stable performance, reliable operation, and good thermal resistance. Made from lanthanum hexaboride with a purity of 99.5%, it serves as an efficient thermionic emission material for electron microscopes, electron beam instruments, spectroscopy systems, and other vacuum electron devices. LaB6 is valued for its relatively low work function, high electron emission capability, and ability to operate at elevated temperatures. In practical use, these properties can help maintain a stable electron beam while reducing the need for frequent emitter replacement. For laboratories and equipment manufacturers, consistent tube dimensions and material quality are equally important, especially when the component must fit an existing electron source assembly. Our 2N5 LaB6 Lanthanum Hexaboride Tube is manufactured with controlled material quality and dimensional accuracy to support dependable integration into different electron emission systems. Customized tube dimensions and specifications are available for specific equipment requirements. Whether used for research, analytical instruments, or industrial electron beam systems, it provides a straightforward and reliable option for customers who need stable LaB6 emission performance without unnecessary complexity.

Features of 2N5 LaB6 Lanthanum Hexaboride Tube

1. Low work function: The electron emission work function is approximately 2.7–2.9 eV—lower than that of tungsten filaments—resulting in higher emission efficiency.

2. High melting point and thermal stability: Capable of stable operation at high temperatures, making it suitable as a thermionic cathode material.

3. High hardness and chemical stability: Exhibits high hardness and resistance to ion bombardment; chemically stable and insoluble in water and hydrochloric acid.

4. High electrical and thermal conductivity: Possesses excellent electrical and thermal conductivity, making it suitable for high-temperature applications.

Applications of 2N5 LaB6 Lanthanum Hexaboride Tube

LaB6 cathode materials are widely used in equipment requiring high-brightness, stable electron beams:

1. Electron microscopes: Provide high-brightness, stable electron beams; serve as the core cathode material for devices such as SEMs.

2. High-energy accelerators and particle sources: Used in accelerator cathodes, ion sources, and high-current pulsed electron sources.

3. Electron beam processing equipment: Includes applications such as electron beam welding and 3D printing.

4. Vacuum electron tubes and traveling-wave tubes: Provide long-life, stable electron emission.

5. Plasma equipment: Utilized as an emission source due to its high melting point and thermal stability. 

⚠️ Usage Precautions of 2N5 LaB6 Lanthanum Hexaboride Tube

High Vacuum Requirement: When heated, LaB6 readily reacts with residual gases (O₂, H₂O, CO, etc.) to form non-emitting compounds, resulting in performance degradation. Practical applications require maintaining a high vacuum environment of 10⁻⁴ Pa or better.

Performance Advantages: Compared to tungsten cathodes, LaB6 cathodes feature a smaller effective emission area (approx. 20 μm) and offer superior brightness and electron source diameter characteristics; however, they are more costly and fragile.