CE1850 Cerium Hexaboride Ceramic Parts, CeB6 Parts
- Catalog No. CE1850
- Density 4.8g/cm3
- Melting Point 2552℃
- Molecular Formula CeB6
- Crystal Structure Cubic
CE1850 Cerium Hexaboride Ceramic Parts, CeB6 Parts
Cerium Hexaboride Ceramic Parts Description
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 a 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.
CeB6 Ceramic Parts Chemical Composition
|
CeB6 (% min.) |
|||
|
99.9 % |
|||
|
B?(% min.) |
|||
|
31 % |
|||
|
Rare Earth Impurities |
Non-RE Impurities |
||
|
La |
＜120 ppm |
Fe |
＜250 ppm |
|
Pr |
＜150 ppm |
Si |
＜100 ppm |
|
Nd |
＜180 ppm |
Ca |
＜90 ppm |
|
Sm |
＜112 ppm |
C |
＜300 ppm |
|
Y |
＜250 ppm |
Mg |
＜100 ppm |
|
|
Ti |
＜100 ppm | |
Cerium Hexaboride Ceramic Parts Applications
-Plasma source for plasma-enhanced coating(PECVD)
-Vacuum electron beam welding machine
-Electron beam surface reforming device
-Electron beam lithography device
-Transmission electron microscope
-Scanning electron microscope
-Surface analysis device
-Radiotherapy devices
Material Data for LaB6 and CeB6
|
Parameter
|
Units | LaB6 | CeB6 |
|---|---|---|---|
| Stoichiometry |
N/A
|
~6
|
|
| Metal Impurities |
ppm by wt.
|
＜30
|
|
| Density |
g/cm3
|
4.72
|
4.80
|
| Coefficient of Thermal Expansion |
α x 106
|
5.6
|
6.2
|
| Electrical Resistivity |
?Ω-cm
|
~50
|
~65
|
| Effective Work Function (100) at 1800 K |
eV
|
2.70
|
2.65
|
| Spectral Emissivity at 0.65 microns |
N/A
|
0.765
|
0.779
|
| Evaporation rate at 1800 K (UHV) |
g/cm2/s
|
2.2 x 10-9
|
1.6 x 10-9
|
| Orientation limit for a specific orientation |
degrees
|
＜2
|
|
| Pyrolitic block mount resistance @ 1800 K |
Ohms
|
1.45
|
|
Packing Service
ACM’s Cerium Hexaboride Ceramic Parts are carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
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