Product Name: Europium Hexaboride (EuB6) 
Specification: 0.8-10um (D50) 
Appearance: Irregular 
Color: Black Grey 
Features: low work function, high melting point, excellent high-temperature performance, low evaporation rate, superior field emission performance 
Usage: Electronic sources, radar, aerospace, metallurgy, environmental protection, nuclear industry and other fields

English name: Europium boride 
Chemical formula: EuB6 
Relative molecular weight: 216.88 
Lattice constant: 4.1782x10pm 
Melting point: 2660 ℃ 
Solubility: Can dissolve in a mixture of anhydrous sulfuric acid and nitric acid (under mild heat conditions), nitric acid (under mild heat), a mixture of sodium hydroxide and hydrogen peroxide, and a 15% sodium hydroxide solution. 
Preparation method: 
EuB6 was prepared using the Eu2O3-B2O3-C system, and pure EuB6 powder was obtained by holding at 1600 ° C for 5 hours in a tube furnace The reaction of this system is not completed in one step. Eu2O3 is first converted into the intermediate phase Eu (BO2) 3, and then decomposed into two divalent rare earth borate products, EuB2O4 and Eu2B2O5. Finally, EuB2O4 and Eu2B2O5 react with B2O3 and C respectively to produce EuB6. This synthesis process is simple, the raw materials are easy to obtain, and it is suitable for batch synthesis. 
Usage: As a rare earth metal hexaboride material, EuB6 has relatively low work function, high melting point, especially good high-temperature performance, low evaporation rate, and superior field emission performance. Can be used as a cold cathode electron source, applied to field emission flat panel displays, cold cathode light-emitting tubes, cold cathode light sources, etc. Europium boride is used as a neutron absorbing material in nuclear reactors and fast breeder reactors. Its use of titanium hafnium rare earth materials can extend the lifespan of boron carbide by twice.