Details

Autor(en) / Beteiligte

• Cui, Wei
• Li, Fei
• Tian, Zhaobo
• Zhang, Jie
• Du, Songmo
• Chen, Zhanglin
• Chen, Kexin
• Liu, Guanghua

Titel

Coarse‐grained β‐Si3N4 powders prepared by combustion synthesis

Ist Teil von

• Journal of the American Ceramic Society, 2021-07, Vol.104 (7), p.2919-2923

Ort / Verlag

Columbus: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Quelle

Wiley-Blackwell Journals

Beschreibungen/Notizen

• Coarse‐grained β‐Si3 N4 powders were prepared by combustion synthesis under N2 pressure of 6 MPa, with a low diluent content of not more than 10 wt.% and high reaction temperature of >1900°C. β‐Si3 N4 was obtained as the major phase in the products, except for a small amount of residual Si. The addition of carbon black was effective to reduce the residual Si, but resulted in the formation of β‐SiC when too much carbon black was used. The coarse‐grained β‐Si3 N4 powders consisted of β‐Si3 N4 crystals with an average thickness of more than 10 µm, and some crystals were thicker than 20 µm. The growth mechanism of the coarse β‐Si3 N4 crystals was discussed, associated with the particular reaction conditions in combustion synthesis.