Synthesis of morphology controllable aluminum nitride by direct nitridation of γ-AlOOH in the presence of N2H4and their sintering behavior
| Autor: | Yusuke Asakura, Hyoung Won Son, Shu Yin, Angga Hermawan, Takao Mori |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Morphology (linguistics) Hydrazine Clay industries. Ceramics. Glass Sintering chemistry.chemical_element 02 engineering and technology Nitride controllable morphology 01 natural sciences sintering behavior chemistry.chemical_compound Aluminium AlN powders 0103 physical sciences 010302 applied physics hydrazine 021001 nanoscience & nanotechnology TP785-869 Chemical engineering chemistry γ-AlOOH Scientific method Ceramics and Composites 0210 nano-technology direct nitridation |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 6, Iss 1, Pp 63-69 (2018) |
| ISSN: | 2187-0764 |
| DOI: | 10.1080/21870764.2018.1439611 |
| Popis: | Direct nitridation process has been performed to synthesize morphology controllable aluminum nitrides (AlN). Three different morphologies of γ-AlOOH were treated under NH3 flow at 1400°C for 4 h. Hydrazine (N2H4) was employed in this study as a nitriding agent to promote nitridation reaction. In the presence of hydrazine, a high purity of aluminum nitride (AlN) could be achieved with less than 5 wt.% of oxygen impurities. Interestingly, after being exposed to elevated temperatures, the initial morphology was still retained. Whereas the TEM measurement indicated surface roughening due to the release of H2O. The investigation of sintering behavior of the prepared AlN powders revealed that plate-like morphology had the lowest shrinkage completing temperature (1574°C). |
| Databáze: | OpenAIRE |
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