CAJ | 학술논문

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。
채용TG-DSC연구불동포복각층후도、불동각층충류납미려분적열성능，병대영향납미려분활성적각층인소작료심입분석。결과표명：동일립경적납미려분，포복층월후，양화전적질량손실비례월대，양화증가적질량분수월소，10%화30%고취물포복적50 nm려분재520~800℃증가적질량23.5%화17.4%，이5%화10%고취물포복적100 nm려분칙증가질량42.5%화36.5%；50 nm려분재용점전적능량석방속솔최쾌，체도최대양화속솔시적온도원저우100 nm려분，이자위550℃화590℃，단기활성저우100 nm려분。납미려분경고취물포복후경185℃열해처리능현저강저각층후도，병제고납미려분양품적열성능。
The thermal properties of several kinds of nano-aluminum with different shell and thickness were studied by TG-DSC. The shell’s effect on nano-aluminum’s activity was analysed in detail. The results show that for nano-aluminum with the same particle size,the thicker the shell is,the more weight the particle loses before oxidation,and the less weight the particle gains during oxidation. From 520℃to 800℃,50 nm aluminum powder with 10%and 30%polymer coating gains 23.5%and 17.4%, respectively. And 100 nm aluminum powder coated by 5%and 10%polymer increases 42.5%and 36.5%,respectively. In all,50 nm aluminum powder releases energy more quickly than 100 nm aluminum. At 550℃,50 nm aluminum powder reaches the max oxidation rate,much lower than that of 100 nm aluminum powder,which is 590℃. But the activity of 50 nm aluminum powder is lower than that of 100 nm aluminum powder. The thermal treat at 185 ℃ after coating process can notably reduce the shell’s thickness and increase the thermal properties of nano-aluminum powder.