MSDS File
Product Overview
Cerium Hexaboride Evaporation Materials (CeB6) is a high-melting compound evaporation source for specialized thin-film deposition and materials research. Carbides, borides, nitrides, silicides, and related compounds may require electron-beam heating or other high-energy evaporation methods, and some compounds can decompose or change composition before a useful vapor pressure is reached. The evaporation route should therefore be qualified against the required film chemistry rather than assumed to be congruent.
Evaporation Behavior and Process Considerations
These compounds commonly require high-energy evaporation methods such as electron-beam heating. However, high source temperature can also promote decomposition, dissociation, or preferential evaporation. Process qualification should therefore include source-behavior observation and film-composition verification before scaling to long runs.
Technical Data
| Parameter | Typical Value / Range | Importance |
|---|---|---|
| Purity | 99.5% – 99.99% | Ensures stable evaporation and electronic properties |
| Chemical Formula | CeB₆ | Maintains correct compound stoichiometry |
| Density | ~4.7 g/cm³ | Influences evaporation behavior |
| Melting Point | ~2550 °C | Suitable for high-temperature evaporation |
| Work Function | ~2.5 eV | Enables efficient thermionic electron emission |
| Form | Pellets / Granules / Pieces | Compatible with evaporation sources |
| Material | Key Advantage | Typical Application |
|---|---|---|
| Cerium Hexaboride (CeB₆) | Low work function and stable electron emission | Electron sources and vacuum electronics |
| Lanthanum Hexaboride (LaB₆) | Very strong thermionic emission | Electron microscopes |
| Tungsten (W) | High melting point and durability | Traditional electron emitters |
| Boron Carbide (B₄C) | High hardness and chemical stability | Protective coatings |
| Question | Answer |
|---|---|
| What makes CeB₆ suitable for electron emission applications? | CeB₆ has a low work function and high electrical conductivity, allowing efficient electron emission at relatively low temperatures. |
| What deposition methods can use CeB₆ evaporation materials? | They are typically used in electron beam evaporation systems or high-temperature thermal evaporation processes. |
| What industries commonly use CeB₆ materials? | Electron microscopy, vacuum electronics, semiconductor research, and advanced materials science. |
| How should CeB₆ evaporation materials be stored? | They should be stored in clean, dry containers to prevent contamination and oxidation. |
| Are custom sizes or forms available? | Yes, CeB₆ evaporation materials can be supplied in various sizes and shapes depending on deposition system requirements. |
Typical Thin-Film Applications
- Hard, refractory, electronic, protective, and specialty compound thin films
- High-temperature or advanced-material coating research
- R&D evaluating decomposition behavior and film stoichiometry under e-beam evaporation
Source Form and Ordering Considerations
For quotation, provide the material or formula, purity, desired source form and size, quantity, evaporation method if known, and any crucible, boat, or e-beam hearth constraints. For compound materials, include the target film composition or application when possible so that source form and process risk can be reviewed together. TFM can supply pellets, pieces, granules, tablets, or other custom forms subject to material manufacturability.
Frequently Asked Questions
Can Cerium Hexaboride be evaporated by electron beam?
Electron-beam heating is often evaluated for high-melting compounds because it can provide localized high temperature. However, the compound may decompose before evaporating congruently.
Will Cerium Hexaboride maintain its stoichiometry during evaporation?
Not necessarily. Carbides, borides, nitrides, silicides, and related compounds can dissociate or evaporate preferentially, so film composition should be verified.
Why is source conditioning important for Cerium Hexaboride?
Gradual conditioning reduces thermal shock, outgassing, and sudden particle ejection while allowing the operator to observe whether the compound remains stable under heating.
What source holder should be used for Cerium Hexaboride?
The holder must tolerate the required temperature and avoid chemical reaction with the charge. E-beam hearth or compatible crucible selection should be reviewed for the specific material.
Is a pellet or dense piece preferable for Cerium Hexaboride?
A dense, mechanically stable charge is generally easier to load and condition than loose powder. The ideal form depends on hearth size and the required evaporation rate.
What information should I provide for a Cerium Hexaboride evaporation-material quotation?
Provide formula, purity, source form, piece or pellet size, quantity, evaporation method, source-holder details, and the intended film composition or application.
Reviews
There are no reviews yet.