影响纳米铝粉活性的壳层因素的TG-DSC研究TG-DSC research of shell's effect on activity of nano-aluminum powder
何丽蓉;肖乐勤;丁海琴;周伟良;
摘要(Abstract)：
采用TG-DSC研究不同包覆壳层厚度、不同壳层种类纳米铝粉的热性能,并对影响纳米铝粉活性的壳层因素作了深入分析。结果表明:同一粒径的纳米铝粉,包覆层越厚,氧化前的质量损失比例越大,氧化增加的质量分数越小,10%和30%高聚物包覆的50 nm铝粉在520~800℃增加的质量23.5%和17.4%,而5%和10%高聚物包覆的100 nm铝粉则增加质量42.5%和36.5%;50 nm铝粉在熔点前的能量释放速率最快,达到最大氧化速率时的温度远低于100 nm铝粉,二者为550℃和590℃,但其活性低于100 nm铝粉。纳米铝粉经高聚物包覆后经185℃热解处理能显著降低壳层厚度,并提高纳米铝粉样品的热性能。
关键词(KeyWords)： 纳米铝粉;热性能;壳层;热处理
基金项目(Foundation): 总装重点预研基金项目(9140A28020308BQ0207)
作者(Author): 何丽蓉;肖乐勤;丁海琴;周伟良;
Email:
DOI: 10.14024/j.cnki.1004-244x.2013.05.005
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