Low-Temperature Fabrication of Plate-like α-Al 2 O 3 with Less NH 4 F Additive

Fluorinated compounds are effective mineralization agents for the fabrication of plate-like α-Al O . However, in the preparation of plate-like α-Al O , it is still an extremely challenging task to reduce the content of fluoride while ensuring a low synthesis temperature. Herein, oxalic acid and NH F...

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Bibliographic Details
Published in:Materials 2023-06, Vol.16 (12)
Main Authors: Chen, Haiyang, Li, Bin, Liu, Meng, Yang, Xue, Liu, Jie, Qin, Tingwei, Xue, Zejian, Xing, Yun, Chen, Junhong
Format: Article
Language:English
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Summary:Fluorinated compounds are effective mineralization agents for the fabrication of plate-like α-Al O . However, in the preparation of plate-like α-Al O , it is still an extremely challenging task to reduce the content of fluoride while ensuring a low synthesis temperature. Herein, oxalic acid and NH F are proposed for the first time as additives in the preparation of plate-like α-Al O . The results showed that plate-like α-Al O can be synthesized at a low temperature of 850 °C with the synergistic effect of oxalic acid and 1 wt.% NH F. Additionally, the synergistic effect of oxalic acid and NH F not only can reduce the conversion temperature of α-Al O but also can change the phase transition sequence.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma16124415