Combustion synthesis of fine AlN powder and its reaction control
| Autor: | Toshitaka Sakurai, Yoshinari Miyamoto, O. Yamada |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Reaction mechanism
Materials science Hydrogen Mechanical Engineering Self-propagating high-temperature synthesis chemistry.chemical_element Sintering Nitride Combustion Condensed Matter Physics Nitrogen chemistry Chemical engineering Mechanics of Materials Specific surface area General Materials Science |
| Zdroj: | Materials Science and Engineering: A. 416:40-44 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2005.09.111 |
| Popis: | Aluminum nitride powder produced by the combustion synthesis (SHS) usually contains coarse particles because of its high reaction temperature. These particles make it difficult to achieve sintering. To improve sinterability, the reaction temperature was controlled by adding hydrogen gas up to 20 vol.% to the reactant gas (nitrogen), and NH 4 F up to 1.5 mass% to the reactant mixture. The reaction temperature was lowered by 400 K when 10 vol.% of H 2 and 1.0 mass% of NH 4 F were added. As a result, the specific surface area of the final powder increased by 80% compared to the powder obtained without addition. The addition of NH 4 F reduced the residual aluminum and oxygen content in the AlN products. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect