Europium boride(EuB6)
Europium boride
Chemical formula: EuB6
Relative molecular weight: 216.88
Lattice constant: 4.1782x10pm
Melting point: 2660 ℃
Solubility:
Can be dissolved in a mixture of anhydrous sulfuric acid and nitric acid (under slightly hot conditions), nitric acid (slightly hot), 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 phase EuB6 powder was obtained by holding it in a tube
furnace at 1600 ° C for 5 hours. The reaction in this system was not completed in one step. Eu2O3 was first converted into the
intermediate phase Eu (BO2) 3, and then decomposed and transformed into two divalent rare earth borate products,EuB2O4
and Eu2B2O5. Finally, EuB2O4 and Eu2B2O5 reacted with B2O3 and Crespectively, resulting in EuB6. This synthesis process is
simple, and the raw materials are easily obtained, making it suitable forbatch synthesis.
Usage:
As a EuB6 material for rare earth metal hexaborides, it has advantages such as relatively low escape work, high melting point, especially good hightemperature performance, low evaporation rate, and superior field emission performance. It can be used as a cold cathode electron source, applied in field electron emission flat panel displays, cold cathode lightemitting tubes, cold cathode light sources, etc. Europium borate is used as a neutron absorber material in nuclear reactors and rapid breeder reactors, and its lifespan
can be extended by one time compared to boron carbide using titanium hafnium rare earth materials.