Lanthanum Hexaboride LaB6 Powder / LaB6 Lanthanum Boride Powder (High purity 99.9%, 1-20um)

Lanthanum hexaboride LaB6 Powder Lanthanum esaboride (LaB6, also called lanthanum and boron) is an inorganic chemical, a lanthanum boride. It is a refractory ceramic material that has a melting point of 2210 ° C and is insoluble in water and hydrochloric acid. It has a low work function and one of the highest emissivity of known electrons and is stable in a vacuum. Stoichiometric samples have an intense violet color, while those rich in boron (on LaB6.07) are blue. The bombardment of ions changes color from purple to emerald green.

The main use of lanthanum hexaboride is in hot cathodes, both as a single crystal and as a coating deposited by physical vapor deposition. Esacids, such as lanthanum esaboride (LaB6) and cerium exoride (CeB6), have low work functions, about 2.5 eV. They are also a bit ‘resistant to cathode poisoning. Cerium hexaboride cathodes have an evaporation rate of less than 1700 K lanthanum hexaboride, but become equal to temperatures above 1850 K. Cesium hexaboride cathodes have a half-life and duration of lanthanum hexaboride, due to the increased resistance of trainers for carbon pollution. The hexaboride cathodes are about ten times “brighter” than the tungsten cathodes and have a lifetime of 10 to 15 times greater. The devices and techniques in which cath labs are used include electron microscopes, microwave tubes, electronic lithography, electron beam welding, X-ray tubes, and free-electron lasers. The lanthanum hexaboride slowly evaporates heated cathodes and forms deposits in the cylinders and the Wehnelt openings. LaB6 also used as a standard/voltage powder X-ray diffraction format to calibrate the instrumental expansion of diffraction peaks.
LaB6 is a superconductor with a relatively low transition temperature of 0.45 K.