Effect of magnesium oxide in multiphase additive on the formation process and morphology of β-Si3N4 whisker
| Autor: | Ziyue Wang, Qianqian Wu, Lujie Wang, Qian Qi, Ning Cui, Tongyang Li, Yuan Yu, Huaguo Tang, Zhuhui Qiao |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Journal of Asian Ceramic Societies, Vol 11, Iss 3, Pp 347-357 (2023) |
| Druh dokumentu: | article |
| ISSN: | 21870764 2187-0764 |
| DOI: | 10.1080/21870764.2023.2217606 |
| Popis: | ABSTRACTβ-Si3N4 whiskers were synthesized by using a moderately low-temperature heat-treatment process, with the aid of a low weight fraction of multiple aids (Y2O3-MgO). The synthesis conditions and aspect ratio of the whiskers were adjusted by changing the MgO content in the composite additive system, heat treatment temperature and holding time. The phase composition and morphology of the whiskers were analyzed by XRD and SEM, respectively. The phase transformation could be completed at 1700°C by introducing only 0.5 wt% MgO. The heat-treated temperature was successfully further reduced to 1650°C by extending the holding time to 5 h. The introduction of MgO can make the whiskers form rapidly at a lower temperature. By introducing a small amount of MgO and appropriately extending the holding time at a lower treatment temperature has been proved to be an effective method to obtain β-Si3N4 whiskers with higher aspect ratio under mild conditions. |
| Databáze: | Directory of Open Access Journals |
| Externí odkaz: |
|