Synthesis of boron carbide powder from hexagonal boron nitride
| Autor: | Yan-Mei Kan, Guo-Jun Zhang, Hong Zeng |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Mechanical Engineering Inorganic chemistry chemistry.chemical_element Boron carbide Carbon black Nitride Condensed Matter Physics Nitrogen chemistry.chemical_compound chemistry Mechanics of Materials Transmission electron microscopy Boron nitride General Materials Science Boron Carbon |
| Zdroj: | Materials Letters. 64:2000-2002 |
| ISSN: | 0167-577X |
| Popis: | We report the synthesis of boron carbide powder via the reaction of hexagonal boron nitride with carbon black. The reaction between hexagonal boron nitride and carbon black completed at 1900 °C for 5 h in vacuum. The particle sizes of the synthesized boron carbide powder were about 100 nm from transmission electron microscopy. The possible reaction mechanism was that hexagonal boron nitride decomposed into elemental boron and nitrogen even when there was no carbon at a relatively low rate, and introduction of carbon into hexagonal boron nitride powder facilitated the decomposition process; the boron from the decomposition of boron nitride reacted with carbon to form boron carbide. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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