Product Code :
Cerium Hexaboride Cathodes, CeB6 Cathodes Cerium Hexaboride (CeB6, also known as Cerium boride) is an inorganic chemical. It is a refractory ceramic material, which is insoluble in water or hydrochloric acid and very stable in a vacuum. Stoichiometric samples of CeB6 have a blue metallic luster. CeB6 is also a superconductor and semiconductor with a relatively high melting point of 2552 ℃. Cerium Boride or (Cerium Hexaboride) is generally immediately available in most volumes. Borides are all hard, high-melting materials with metal-like conductivity. They are stable to nonoxidizing acids but break down in strong oxidizing agents and strong alkalis. Cerium boride disc, also known as cerium hexaboride disc or CeB6, is a refractory ceramic material. The main use of cerium hexaboride is a hot cathode coating or a hot cathode made of cerium hexaboride crystals. It usually operates at a temperature of 1450 ° C.
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Product Information
Cerium Hexaboride Cathodes, CeB6 Cathodes Cerium Hexaboride (CeB6, also known as Cerium boride) is an inorganic chemical. It is a refractory ceramic material, which is insoluble in water or hydrochloric acid and very stable in a vacuum. Stoichiometric samples of CeB6 have a blue metallic luster. CeB6 is also a superconductor and semiconductor with a relatively high melting point of 2552 ℃. Cerium Boride or (Cerium Hexaboride) is generally immediately available in most volumes. Borides are all hard, high-melting materials with metal-like conductivity. They are stable to nonoxidizing acids but break down in strong oxidizing agents and strong alkalis. Cerium boride disc, also known as cerium hexaboride disc or CeB6, is a refractory ceramic material. The main use of cerium hexaboride is a hot cathode coating or a hot cathode made of cerium hexaboride crystals. It usually operates at a temperature of 1450 ° C.
The cerium hexaboride (CeB6) cathode has the advantage of high current emission density, the unique properties of cerium hexaboride crystals provide a stable electron-emitting medium with a work function of less than 2.6 eV. The low work function produces a higher current at lower cathode temperatures, which means higher brightness or current in the beam, and longer CeB6 cathode life. Compared to LaB6 cathodes, CeB6 cathodes have a lower evaporation rate and lower influence on current density in the O2 atmosphere.
Synonyms
Cerium hexaboride, CeBix, CEBI
Cerium Hexaboride Cathodes Specifications
Dimensions
Per your request or drawing
We can customized as required
Properties（Theoretical）
| Compound Formula | CeB6 |
| Molecular Weight | 204.98 |
| Appearance | Purple |
| Melting Point | 2552°C |
| Density | 4.80-4.87 g/cm3 |
| Solubility in water | insoluble |
| Crystal structure | Cubic |
| Stoichiometry | ~6 |
| Metal Impurities | <30 Ppm by wt. |
| Coefficient of Thermal Expansion | 6.2α*106 |
| Electrical Resistivity | ~65μΩ-cm |
| Effective Work Function(100) at 1800K | 2.65 eV |
| Spectral Emissivity at 0.65 Microns | 0.779 |
| Evaporation Rate at 1800K(UHV) | 1.6×10-9 g |
| Orientation Limit for a Specific Orientation | <2 Degrees |
| Pyrolitic Block Mount Resistance at 1800K | 1.45 Ohms |
LaB6 tube vs. CeB6 tube
| Material | CeB6 | LaB6 |
| Brightness (A/cm2-sr) | 107 | 107 |
| Metal Impurities(ppm by wt.) | ＜30 | ＜30 |
| Stoichiometry | ~6 | ~6 |
| Short-term beam current stability % RMS | <1 | <1 |
| Density(g/cm3) | 4.80 | 4.72 |
| Typical service life (hr) | 1,500+ | 1000+ |
| Operating vacuum (torr) | 10-7 | 10-7 |
| Work function (eV) | ~2.65 | ~2.70 |
| Evaporation rate (g/cm2-sec) | 1.6 x 10-9 | 2.2 x 10-9 |
| Effective Work Function (100) at 1800 K(eV) | 2.65 | 2.70 |
| Spectral Emissivity at 0.65 microns | 0.779 | 0.765 |
| Electrical Resistivity(µΩ-cm) | ~65 | ~50 |
| Orientation limit for a specific orientation(degrees) | ＜2 | ＜2 |
| Pyrolitic block mount resistance @ 1800 K(Ohms) | 1.45 | 1.45 |
Applications of Cerium Hexaboride Cathodes
-Thermionic emission (cathode)
As cathodes of SEM and TEM
Electron beam lithography apparatus
Scanning Auger Spectrograph and other micro electron beam applications
–Plasma soure for plasma enhanced coating (PECVD)
-Vacuum electron beam welding machine
-Electron beam lithography device
-Transmission electron microscope
-Surface analysis device
-Radiotherapy devices
Packing of Cerium Hexaboride Cathodes
Standard Packing:
Sealed bags in carton boxes. Special package is available on request.
As a ceramic material, CeB6 is quite fragile in a lot of cases. The CeB6 Cathodes are usually held in plastic bags by vacuum, and protected with heavy foam.
ATTs’ CeB6 Cathodes is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
Chemical Identifiers
| Linear Formula | CeB6 |
| MDL Number | N/A |
| EC No. | 234-526-9 |
| Beilstein/Reaxys No. | N/A |
| Pubchem CID | N/A |
| IUPAC Name | N/A |
| SMILES | N/A |
| InchI Identifier | InChI=1/B6.Ce/c1-2-3(1)5(1)4(1,2)6(2,3)5;/q-2;+2 |
| InchI Key | N/A |
