CHINESE JOURNAL OF ENERGETIC MATERIALS
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酸性和有机溶液对α-AlH3稳定改性的研究
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1.浙江大学能源清洁利用国家重点实验室, 浙江 杭州 310027;2.杭州电子科技大学能源研究所, 浙江 杭州 310018;3.湖北航天化学技术研究所航天化学动力技术重点实验室, 湖北 襄阳 441000

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基金项目:

国家自然科学基金(51706057);航天化学动力技术重点实验室开放基金资助(STACPL220181B02-2)


Stabilizing Modifications of α-AlH3 by Acidic and Organic Solution Treatment
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1.State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China;2.Institute for Energy Studies, Hangzhou Dianzi University,Hangzhou 310018, China;3.Science and Technology on Aerospace Chemical Power Laboratory, Hubei Institute of Aerospace Chemical Technology, Xiangyang 441000, China

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    摘要:

    为提高α-AlH3的稳定性,采用酸性和有机溶液对其进行了处理,通过结构表征、稳定性测试和机械感度测试对比研究了处理前后的样品,探讨了改性对α-AlH3释氢性能的影响及改性机理。结果表明,改性方法有效且对样品释氢性能影响微弱,改性后的α-AlH3的释氢损失量不超过1%,起始释氢温度和释氢峰值温度变化不超过±3 ℃,最大释氢速率变化不超过20%,其中,氢溴酸处理增强α-AlH3贮存稳定性的效果最好,样品贮存期间释氢量由0.87%降至0.02%。酸性和有机溶液处理能够使样品表面的杂质和缺陷减少,酸性溶液处理的α-AlH3表面形成了无定形氧化铝或氢氧化铝,增强了α-AlH3的稳定性。相较于有机溶液,酸性溶液在实际应用中更适于作为改性剂。

    Abstract:

    In order to improve the stability of α-AlH3, acidic and organic solutions were used as modifiers to treat α-AlH3. Through structural characterization, stability test, and mechanical sensitivity test, the properties of samples before and after the treatment were compared and analyzed. The performance on hydrogen release and the corresponding modification mechanisms were compared, and the modifier with a better stabilizing effect was obtained. The experimental results show that the proposed modification methods are effective and have a negligible effect on the hydrogen release properties of the studied samples. The weight loss associated with hydrogen release observed for the modified α-AlH3 does not exceed by 1%, and the changes in initial temperature and peak temperature of hydrogen release are less than ±3 ℃, the maximum hydrogen release rate is not affected by more than 20%. Treatment by hydrobromic acid solution exhibited the best effect on enhancing the storage stability of α-AlH3, and the amount of hydrogen release for the studied samples during the storage was found to decrease from 0.87% to 0.02%. It suggests that the acidic and organic solution treatment can reduce the impurities and defects on the surface of α-AlH3 sample, and the amorphous alumina or aluminum hydroxide are likely to be formed on the surface of α-AlH3 after the acidic solution treatment which enhances the stability of α-AlH3. Compared with organic solutions, the acidic solution treatment shows a better ability to maintain the hydrogen release properties of α-AlH3, enhance its storage stability, and reduce mechanical sensitivity, which can be used as a promising modifier in practical applications.

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引用本文

袁雪玲,李和平,庞爱民,等.酸性和有机溶液对α-AlH3稳定改性的研究[J].含能材料, 2022, 30(8):779-786. DOI:10.11943/CJEM2021142.
Yuan Xue-ling, Li He-ping, Pang Ai-min, et al. Stabilizing Modifications of α-AlH3 by Acidic and Organic Solution Treatment[J]. Chinese Journal of Energetic Materials, 2022, 30(8):779-786. DOI:10.11943/CJEM2021142.

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历史
  • 收稿日期: 2021-05-28
  • 最后修改日期: 2022-06-01
  • 录用日期: 2022-05-20
  • 在线发布日期: 2022-05-23
  • 出版日期: 2022-08-25