Low-Temperature Fabrication of Plate-like α-Al2O3 with Less NH4F Additive

被引：1
|
作者：
Chen, Haiyang [1 ]
Li, Bin [1 ]
Liu, Meng [1 ]
Yang, Xue [2 ]
Liu, Jie [1 ]
Qin, Tingwei [1 ]
Xue, Zejian [1 ]
Xing, Yun [1 ]
Chen, Junhong [1 ]
机构：
[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing 100083, Peoples R China
[2] Hebei Univ Architecture, Sch Civil & Engn, Zhangjiakou 075000, Peoples R China
来源：
MATERIALS | 2023年 / 16卷 / 12期
关键词：
plate-like alpha-Al2O3; low temperature; oxalic acid; NH4F; synergistic effect; PHASE-TRANSFORMATION; ULTRAFINE ALUMINA; GAMMA-ALUMINA; ALF3; SURFACE; TRANSITION; BOEHMITE; POWDER; GROWTH; VAPOR;
D O I：
10.3390/ma16124415
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Fluorinated compounds are effective mineralization agents for the fabrication of plate-like alpha-Al2O3. However, in the preparation of plate-like a-Al2O3, it is still an extremely challenging task to reduce the content of fluoride while ensuring a low synthesis temperature. Herein, oxalic acid and NH4F are proposed for the first time as additives in the preparation of plate-like alpha-Al2O3. The results showed that plate-like a-Al2O3 can be synthesized at a low temperature of 850 degrees C with the synergistic effect of oxalic acid and 1 wt.% NH4F. Additionally, the synergistic effect of oxalic acid and NH4F not only can reduce the conversion temperature of alpha-Al2O3 but also can change the phase transition sequence.
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页数：11
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