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Rare Earth Hexaborides

Rare earth hexaborides (general formula: REB₆) are a family of functional ceramic materials with cubic crystal structures. Featuring low work function, high electron emissivity, high melting point and excellent thermal stability, they serve as core materials for advanced electron emission applications.

BoronHub offers two flagship products: lanthanum hexaboride (LaB₆) and cerium hexaboride (CeB₆), both with purity above 99.9%. Multiple forms are available including nanopowders and single-crystal granules.

Lanthanum Hexaboride (LaB₆)

LaB₆ has a work function of approximately 2.5–2.7 eV, delivering high emission brightness and stable beam current. It is the preferred thermocathode material for scanning electron microscopes (SEM), transmission electron microscopes (TEM), electron beam lithography systems and particle accelerators. Single-crystal LaB₆ cathodes achieve over 10 times the brightness of tungsten cathodes, and are widely deployed in electron optics, aerospace and high-end scientific research.

Cerium Hexaboride (CeB₆)

CeB₆ exhibits superior resistance to carbon contamination, with a service life 50% longer than LaB₆. It features a lower evaporation rate at 1700 K, making it suitable for long-lifetime, high-stability applications such as microwave tubes, electron beam welding equipment, X-ray tubes and free-electron lasers.

BoronHub supplies high-purity LaB₆ and CeB₆ with customizable particle sizes, fully supporting industries covering electron optics, semiconductor equipment, aerospace and cutting-edge scientific research.

3N Purity Lanthanum Hexaboride (LaB₆) Nanoparticles Cas No.12008-21-8
Lanthanum Hexaboride (LaB₆), an inorganic compound belonging to lanthanum borides, is an outstanding refractory ceramic material. It features small particle size and high purity, with stable chemical properties at room temperature. Benefiting from its high melting point, excellent thermionic emission performance, high hardness and good electrical conductivity, it offers unique value in high-end fields. It can replace conventional high-melting-point metals and alloys in fusion reactors, thermionic power generation and other scenarios, overcoming their performance limitations and extending equipment service life. As an important inorganic material, LaB- is widely used in more than 20 military and high-tech industries including electronics, metallurgy, new energy and aerospace, with strong market demand and broad application prospects.
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3N Purity Cerium Hexaboride (CeB₆) With Cathode Brightness Cas No.12008-02-5
Cerium Hexaboride (CeB₆) is an inorganic compound composed of cerium and boron, serving as a core high-performance material for thermionic cathodes. It is mainly used in thermionic cathode fabrication, either directly as bulk crystals or as a coating. It is often used together with LaB₆ in high-current thermionic cathode assemblies. CeB₆ is widely applied in high-end electronic devices and special processing fields, including electron microscopes, microwave tubes, electron beam lithography, electron beam welding, X-ray tubes, and free-electron lasers.
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