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.

引用

页数：11

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