Application of Cerium Hexaborate
Release time:
2023-01-04
Cerium hexaborate is mainly used as a coating for hot cathodes, or hot cathodes are directly composed of cerium hexaborate crystals. Cerium hexaborate (CeB6) and lanthanum hexaborate (LaB6) are often used as high current hot cathode coatings. Six boride has a low work function, about 2.5 eV, and has a certain tolerance to cathode pollution. The cerium borate cathode has a lower evaporation rate than lanthanum borate at 1700 K, but they become consistent at 1850 K and even have a higher evaporation rate above that temperature. Cerium borate cathode has a 50% longer lifespan than lanthanum borate due to its higher carbon pollution resistance. The brightness of boride cathode is ten times that of tungsten cathode, and its life is 10-15 times that of tungsten cathode. Some laboratory experiments have shown that CeB6 is more resistant to the negative effects of carbon pollution than LaB6. They are commonly used in electron microscopes, microwave tubes, electron beam etching, electron beam welding, X-ray tubes and free-electron laser.
Cerium hexaborate is mainly used as a coating for hot cathodes, or hot cathodes are directly composed of cerium hexaborate crystals. Cerium hexaborate (CeB6) and lanthanum hexaborate (LaB6) are often used as high current hot cathode coatings. Six boride has a low work function, about 2.5 eV, and has a certain tolerance to cathode pollution. The cerium borate cathode has a lower evaporation rate than lanthanum borate at 1700 K, but they become consistent at 1850 K and even have a higher evaporation rate above that temperature. Cerium borate cathode has a 50% longer lifespan than lanthanum borate due to its higher carbon pollution resistance. The brightness of boride cathode is ten times that of tungsten cathode, and its life is 10-15 times that of tungsten cathode. Some laboratory experiments have shown that CeB6 is more resistant to the negative effects of carbon pollution than LaB6. They are commonly used in electron microscopes, microwave tubes, electron beam etching, electron beam welding, X-ray tubes and free-electron laser.
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