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

共 50 条

[41] Ag modified Mn-Ce/γ-Al2O3 catalyst for selective catalytic reduction of NO with NH3 at low-temperature
Cao, Fan
Xiang, Jun
Su, Sheng
Wang, Pengying
Hu, Song
Sun, Lushi
FUEL PROCESSING TECHNOLOGY, 2015, 135 : 66 - 72
[42] SCR of NO by DME over Al2O3 based catalysts: Influence of noble metals and Ba additive on low-temperature activity
Shimokawabe, Masahide
Kuwana, Akihiro
Oku, Shogo
Yoshida, Kazuki
Arai, Masahiko
CATALYSIS TODAY, 2011, 164 (01) : 480 - 483
[43] CHARACTERIZATION OF MO/AL2O3 CATALYSTS BY LOW-TEMPERATURE OXYGEN-CHEMISORPTION
NAG, NK
JOURNAL OF CATALYSIS, 1985, 92 (02) : 432 - 437
[44] CO low-temperature oxidation over Au/MOx/Al2O3 catalysts
Wang, DH
Hao, ZP
Kang, SF
Cheng, DY
Shi, XC
CHINESE JOURNAL OF CATALYSIS, 2002, 23 (06) : 489 - 490
[45] INFRARED IDENTIFICATION OF THE LOW-TEMPERATURE FORMS OF ETHYLENE ADSORBED ON PT/AL2O3
MOHSIN, SB
TRENARY, M
ROBOTA, HJ
JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (18): : 5229 - 5233
[46] Low-temperature spectroscopic and scintillation characterisation of Ti-doped Al2O3
MIkhailik, VB
Kraus, H
Balcerzyk, M
Czarnacki, W
Moszynski, M
Mykhaylyk, MS
Wahl, D
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2005, 546 (03): : 523 - 534
[47] Activity and deactivation of Au/Al2O3 catalyst for low-temperature CO oxidation
Zou, Xu-hua
Qi, Shi-xue
Suo, Zhang-huai
An, Li-dun
Li, Feng
CATALYSIS COMMUNICATIONS, 2007, 8 (05) : 784 - 788
[48] Deactivation and stability of Au/Al2O3 catalyst for CO low-temperature oxidation
Zou, XH
Qi, SX
Suo, ZH
An, LD
Li, F
CHINESE JOURNAL OF CATALYSIS, 2006, 27 (02) : 161 - 165
[49] Low-temperature superplasticity of Al2O3(p)/Ni-Co nanocomposites
Wang Guofeng
Zhang Kaifeng
Jin Hua
Liu Boyang
Yang Boping
MATERIALS & DESIGN, 2012, 33 : 399 - 404
[50] Studies on the Low-Temperature Synthesis of Fine α-Al2O3 Powder by Precipitation Route
Glass Physics and Chemistry, 2020, 46 : 312 - 320

← 1 2 3 4 5 →