Cerium Boride (CeB6)-Powder
Characteristic
Cerium Boride, also called Cerium Hexaboride or CeB6, is a refractory ceramic material. The principal use of cerium hexaboride is a coating of hot cathodes, or hot cathodes made of cerium hexaboride crystals. It usually operates at temperature of 1450 °C. Cerium hexaboride, like lanthanum hexaboride, slowly evaporates during the cathode operation. In conditions where CeB6 cathodes are operated under 1850 K, CeB6 should maintain its optimum shape longer and therefore last longer. While the process is about 30% slower than with lanthanum boride, the cerium boride deposits are reported to be more difficult to remove.
| Molar mass: | 204.98 g/mol |
| Appearance: | intense purple violet |
| Density: | 4.87 g/cm3 |
| Melting point: | 2,2552 °C (4,310 °F; 2,650 K) |
| Solubility in water: | insoluble |
| Crystal structure: | Cubic |
Chemical Composition
|
Major constituent |
Impurity(≤) |
|||||||||
|
Item |
B |
Ce |
Fe |
C |
Mg |
Si |
Ca |
Mn |
Cu |
Cr |
|
Content(%) |
31.85 |
67.9 |
0.04 |
0.072 |
0.00012 |
0.0018 |
0.0075 |
0.00042 |
0.0006 |
0.0002 |
Granularity Of Materials -360 Mesh
Application
Cerium boride cathodes show lower evaporation rate at 1700 K than lanthanum boride, but it becomes equal at 1850 K and higher above that. Cerium boride cathodes have one and half the lifetime of lanthanum boride, due to its higher resistance to carbon contamination. Boride cathodes are about ten times as “bright” than the tungsten ones and have 10–15 times longer lifetime. In some laboratory tests, CeB6 has proven to be more resistant to the negative impact of carbon contamination than LaB6. They are used e.g. in electron microscopes, microwave tubes, electron lithography, electron beam welding, X-Ray tubes, and free electron lasers.
Cerium Boride Synonyms
Cerium hexaboride, CeBix, CEBI.
Package
Vacuum pumping and argon protection, 500g or 1000g / bottle.
