One-step mechanochemical transformation of bulk pseudo-boehmite into nanosized α-Al2O3

被引：4

作者：

Ma, Huirong ^{[1
]}

Cen, Shangxu ^{[2
]}

Yu, Zhongrui ^{[1
]}

Xing, Xiangyuan ^{[2
]}

Chen, Jingjing ^{[1
]}

Wang, Dajian ^{[1
,2
]}

Dong, Chenlong ^{[1
,2
]}

Mao, Zhiyong ^{[1
,2
]}

机构：

[1] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin Key Lab Photoelect Mat & Devices, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Key Lab Display Mat & Photoelect Devices, Minist Educ, Tianjin 300384, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2022年 / 48卷 / 23期

基金：

中国国家自然科学基金;

关键词：

Mechanochemical transformation; Pseudo-boehmite; Nanosized alpha-Al2O3; Decrystallization-recrystallization; Ball milling; ALPHA-ALUMINA; PHASE-TRANSFORMATION; NANOPARTICLES; TEMPERATURE; TRANSITION; REDUCTION; ADDITIVES;

D O I：

10.1016/j.ceramint.2022.08.154

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Economical and environmentally friendly synthesis of nanosized alpha-Al2O3 with high specific surface area remains considerable challenges due to the thermodynamically instability and high activation energy barrier. Herein, the highly efficient strategy one-step mechanochemical transformation of bulk pseudo-boehmite into nanosized alpha-Al2O3 has been developed. Variety of factors, including drying degree, process control agents, texture of media, have been surveyed during mechanochemical process. By optimization, the nanosized alpha-Al2O3 with average grain size of 16.5 nm and specific surface area of 101. 7 m(2) g(-1) are successfully prepared. By monitoring ballmilling process, we propose a decrystallization-recrystallization mechanism for the transformation of pseudoboehmite into alpha-Al2O3. This work would pave new pathway on one-step mechanochemical synthesis of nanosized alpha-Al2O3.

引用

页码：35480 / 35485

页数：6

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