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http://dx.doi.org/10.14478/ace.2013.1109

Preparation and Thermal Stability of FeS2 Fine Powder for Thermal Battery  

Choi, Yusong (Convergence Technology Research Directorate, Agency for Defense Development)
Yu, Hye-Ryeon (Convergence Technology Research Directorate, Agency for Defense Development)
Cheong, Haewon (Convergence Technology Research Directorate, Agency for Defense Development)
Cho, Sungbaek (Convergence Technology Research Directorate, Agency for Defense Development)
Lee, Young-Seak (Department of Applied Chemistry and Biological Engineering, Chungnam National University)
Publication Information
Applied Chemistry for Engineering / v.25, no.1, 2014 , pp. 72-77 More about this Journal
Abstract
Microstructure and thermal stability of mechanically ball milled $FeS_2$ were investigated. The average particle size and distribution of $FeS_2$ powder were changed in two steps with the increased ball milling time. The average particle size drastically decreased from $98.4{\mu}m$ to 1.01 and $0.89{\mu}m$ after ball milling of 10 h and 30 h, respectively. However, the distribution was broad and a shoulder appeared at $2{\mu}m$ because the pulverization was still in process at 10 h ball milling. After 60 h ball milling, the distribution became narrower. After ball milling of 120 h, the average particle size increased because of $FeS_2$ particle agglomeration. Therefore, the particle size distribution became broaden again. Finally, after ball milling of 170 h, $FeS_2$ with the narrowest size distribution can be obtained. Thermal stability of $FeS_2$ was unstable as the $FeS_2$ particle was pulverized. Therefore, the activation energy of the fine size particles is 27% lower than that of the as-received $FeS_2$.
Keywords
thermal battery; $FeS_2$; ball-milling; thermal stability; activation energy;
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Times Cited By KSCI : 10  (Citation Analysis)
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