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Lanthanum hexaboride (La B 6, also called lanthanum boride and LaB) is an inorganic chemical, a boride of lanthanum. It is a refractory ceramic material that has a melting point of 2210 °C, and is insoluble in water and hydrochloric acid . [ 1 ]
A lanthanum hexaboride (LaB 6) plasma source was developed for the ETPD [5] (similar to the one used in the Large Plasma Device), and is capable of producing a long column of magnetized plasma (~100 m) that winds itself multiple times along the toroidal axis of the machine. The plasma column was shown to be current-free and terminates on the ...
Lanthanum is a chemical element with the symbol La and the atomic number 57. It is a soft, ductile, silvery-white metal that tarnishes slowly when exposed to air.
The CuTi 2 structure of the lanthanum, cerium and praseodymium diiodides along with HP-NdI 2 contain 4 4 nets of metal and iodine atoms with short metal-metal bonds (393-386 La-Pr). [10] these compounds should be considered to be two-dimensional metals (two-dimensional in the same way that graphite is). The salt-like dihalides include those of ...
Cerium hexaboride (Ce B 6, also called cerium boride, CeBix, CEBIX, and (incorrectly) CeB) is an inorganic chemical, a boride of cerium. It is a refractory ceramic material. It has a low work function, one of the highest electron emissivities known, and is stable in vacuum. The principal use of cerium hexaboride is a coating of hot cathodes. It ...
A secondary cathode source made of lanthanum hexaboride (LaB 6) was developed in 2010 [7] to provide a hotter and denser plasma when required. It consists of four square tiles joined to form a 20 20 cm 2 area and is located at the other end of the LAPD. The circuit is also closed by a molybdenum mesh anode, which may be placed further down the ...
L. Lanthanide trichloride; Lanthanum acetate; Lanthanum acetylacetonate; Lanthanum aluminate; Lanthanum barium copper oxide; Lanthanum carbide; Lanthanum carbonate
Lower-resolution systems can use thermionic sources (cathode), which are usually formed from lanthanum hexaboride. However, systems with higher-resolution requirements need to use field electron emission sources, such as heated W/ZrO 2 for lower energy spread and enhanced brightness. Thermal field emission sources are preferred over cold ...