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三 氢 化 铝 合 成 及 应 用 评 价 技 术 进 展 325

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Recent Progresses on Synthesis and Evaluation of AlH 3

PANG Ai⁃min 1，2 ，ZHU Zhao⁃yang 1，2 ，XU Xing⁃xing 2
（1. Science and Technology on Aerospace Chemical Power Laboratory，Xiangyang 441003，China；2. Hubei Institute of Aerospace Chemical Technology，
Xiangyang 441003，China）
Abstract：Aluminum hydride（AlH 3 ）has high hydrogen content capacity（mass content>10%），low molecular weight of com⁃
bustion products and relatively high thermal decomposition temperature. AlH 3 can significantly improve the energy level of solid
propellants by partially replacing aluminum powder，so it is considered as a very important high⁃energy fuel. However，there is
critical dependence of the solid propellant performances on the quality of AlH 3 crystals. The choice and optimization of prepara⁃
tion method largely determines the quality and cost of the products. It has been shown that the unstable nature of AlH 3 could
greatly affect the aging and storage performances. Moreover，the incompatibility between some components and AlH 3 decreases
the safety of corresponding solid propellants. The problems mentioned above are the key technical issues and need to be solved
before large⁃scale application of AlH 3 in solid propellant formulations. The advances in synthetic techniques for AlH 3 and its ap⁃
plication in solid propellants over the world have been introduced in this review paper. The stabilizing strategies and post evalua⁃
tion of AlH 3 in relevant research institutes are summarized as well，based on which the future research directions are proposed.
The literature shows that the safety and quality control during scaling⁃up of AlH 3 can be solved by using ether synthetic method.
The applicability of AlH 3 in solid propellant can be greatly improved by surface treatment，including coating of AlH 3 .
Key words：Aluminum hydride；synthesis；solid propellants；high energy fuel；stability
CLC number：TJ55；V512 Document code：A DOI：10.11943/CJEM2019004
（责编：张 琪）

CHINESE JOURNAL OF ENERGETIC MATERIALS 含能材料 2019 年 第 27 卷 第 4 期 （317-325）