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나노 구조 물리 연구단
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Tailoring oxidation of Al particles morphologically controlled by carbon nanotubes

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Title
Tailoring oxidation of Al particles morphologically controlled by carbon nanotubes
Author(s)
Hye Yun Jeong; Kangpyo So; Jung Jun Bae; Sang Hoon Chae; Thuc Hue Ly; Tae Hyung Kim; Dong Hoon Keum; Chang Kee Kim; Jun Sik Hwang; Yoon Jeong Choi; Lee, Young Hee
Publication Date
2013-06
Journal
ENERGY, v.55, no., pp.1143 - 1151
Publisher
PERGAMON-ELSEVIER SCIENCE LTD
Abstract
Aluminum powder is used for energetic materials due to high energy density. Controlling oxidation rate, oxidation temperature, and reaction enthalpy is important parameters prior to practical use. Here, we engineered static and dynamic properties of oxidation of Al particles by mixing CNTs (carbon nanotubes) having high thermal conductivity and large exothermic energy. Morphologies of Al/CNT mixture were engineered by a mechanical pulverization. Among various morphologies of Al/CNT mixture of i) CNTs adhered on the surface of Al particles, ii) CNTs partially embedded onto Al particles, forming an urchin type, and iii) CNTs fully embedded into aggregated Al particles, urchin type Al/CNT revealed the largest exothermic enthalpy at the lower oxidation temperature for both γ-Al2O3 and α-Al2O3 phases. This was attributed to the fast heat transfer into Al particles via partially embedded CNTs. Large exothermic enthalpy as well as the mass of alumina were obtained in oxidation of Al/CNT mixture compared to pure Al particles up to 1000°C oxidation. The exothermic enthalpy showed strong dependence on the CNT content, increasing to-188kJ/g at 20wt% CNT. The engineering ability of thermal properties in Al particles with CNTs opens a new research area for diverse use of solid fuel Al. © 2013.
URI
https://pr.ibs.re.kr/handle/8788114/1319
ISSN
0360-5442
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
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