Citation: ZHU Zhaoyang, JIANG Aifeng, XIA Debin, WANG Ping, LIN Kaifeng, FAN Jizhuang, FAN Ruiqing, YANG Yulin. Stability of Aluminum Hydride Etherates and Its Solid-State Conversion to Alpha-Aluminum Hydride[J]. Chinese Journal of Applied Chemistry, ;2019, 36(9): 1069-1075. doi: 10.11944/j.issn.1000-0518.2019.09.190032 shu

Stability of Aluminum Hydride Etherates and Its Solid-State Conversion to Alpha-Aluminum Hydride

ZHU Zhaoyang ^a,b ,
JIANG Aifeng ^a ,
XIA Debin ^a ,
WANG Ping ^a ,
LIN Kaifeng ^a ,
FAN Jizhuang ^a,, ,
FAN Ruiqing ^a ,
YANG Yulin ^a,,

a.
MⅡT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
b.
Science and Technology on Aerospace Chemical Power Laboratory, Xiangyang 441003, China

Corresponding author: FAN Jizhuang, fanjizhuang@hit.edu.cn YANG Yulin, ylyang@hit.edu.cn
Received Date: 30 January 2019
Revised Date: 26 March 2019
Accepted Date: 23 April 2019

Fund Project: the National Key R&D Program of China 2017YFB1300104the Science Foundation of Aerospace 6141B0626020101the National Natural Science Foundation of China 21873025Supported by the National Key R&D Program of China(No.2017YFB1300104), the National Natural Science Foundation of China(No.21571042, No.21873025), and the Science Foundation of Aerospace(No.6141B0626020201, No.6141B0626020101)the National Natural Science Foundation of China 21571042the Science Foundation of Aerospace 6141B0626020201

Figures(7)

The problem of whether α-AlH₃ crystallized by aluminum hydride etherates(AlH₃·nEt₂O) stored for varying time is systematically studied. First, AlH₃·nEt₂O was prepared by a conventional method and stored under a nitrogen atmosphere for 1 to 20 days, and then α-AlH₃ was prepared by a solid phase and vacuum crystallizing technique based on the AlH₃·nEt₂O. XRD, TGA and SEM analysis show that the ether composition gradually decreases during storage and α-AlH₃ with higher purity can be prepared within 10 days of storage. However, after 10 days, γ-AlH₃ with smaller particle size appeared. Finally, we confirm that the amount of ether in AlH₃·nEt₂O is directly related to the quality of prepared α-AlH₃. Another highlight of this paper is the abandonment of the toxic reagent toluene used in conventional processes. This also provides a possibility for the kilogram preparation of α-AlH₃.
- aluminum hydride,
- preparation,
- storage
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