Journal of Powder Materials

Tek-Kyoung Sung

2 Articles

Application of Mechanical Alloying Method on the Fabrication of Zinc Sulfide Photo-luminescence Powders: In-Shup Ahn, Woo-Hyun Chong, Sung-Yeal Bae, Tek-Kyoung Sung, Dong-Kyu Park; J Korean Powder Metall Inst. 2005;12(4):279-283.; DOI: https://doi.org/10.4150/KPMI.2005.12.4.279

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Abstract PDF: In this study, the ZnS composite powders for host material in phosphor was synthesized in situ by mechanical alloying. As the mechanical alloying time increases, particle size of ZnS decreases. ZnS powders of 1.85;mum in a mean size was fabricated by mechanical alloying for 10h. The crystal structures of ZnS powders were investigated by X-ray diffraction and the photo-luminescence properties was evaluated with the optical spectra analyzer. The steady state condition of mechanically alloyed ZnS was obtained as a mean particle size of 2;mum in 5h milling. The sphalerite and wurtize structures coexist in the ZnS mechanically alloyed for 5h. The ZnS powder mechanically alloyed for 10h grows to the sphalerite structure. And the strong emission peaks of ZnS are observed at 480 nm wave length at the powders of mechanically alloyed for 10h, but the sphalerite and wurtize structures in ZnS coexist and emission peaks are not appeared at the powders of mechanically alloyed for 10h.

A study on the Active Material FeS₂ in Battery Fabricated by Mechanical Alloying: Woo-Hyun Jung, In-Shup Ahn, Hyo-Jun Ahn, Sung-Yeal Bae, Tek-Kyoung Sung, Tae-Bum Kim, You-Young Kim; J Korean Powder Metall Inst. 2005;12(3):179-185.; DOI: https://doi.org/10.4150/KPMI.2005.12.3.179

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As the electrodes of secondary battery are made with sulfur compounds, excellent electrode system of environmental non-toxicity, high specific energy density and low material cost can be obtained. In this study, the FeS_2 fine compound powders for active material in the battery were synthesized by mechanical alloying. Fine Fe-53.5 wt.%S powders of 450 nm of mean size were fabricated by mechanical alloying for 60 hours at the horizontal attritor. As the mechanical alloying time increases, particle size of Fe-53.5 wt.%S was decreased and steady state of Fe-53.5 wt.%S compound powders was obtained at 30 hours. Fe-53.5 wt.%S cathode shows the excellent discharge capacity (1011 mAh/g).

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Synthesis of Cathode Materials Fe-Doped NiS₂ by Mechanical Alloying for Li/NiS₂ Cells
Xiao Jing Liu, Dong Wook Park, Zhe Zhu Xu, Sang Dae Kang, In Shup Ahn, Hyo Jun Ahn
Advanced Materials Research.2011; 287-290: 1428. CrossRef
Synthesis of Nickel-Coated FeS₂ Particles as Active Material for Li/FeS₂ Cell by Mechanical Alloying
Xiao Jing Liu, Sang Dae Kang, Zhe Zhu Xu, In Shup Ahn
Materials Science Forum.2010; 658: 77. CrossRef
Electrochemical characteristics of Na/FeS2 battery by mechanical alloying
T.B. Kim, W.H. Jung, H.S. Ryu, K.W. Kim, J.H. Ahn, K.K. Cho, G.B. Cho, T.H. Nam, I.S. Ahn, H.J. Ahn
Journal of Alloys and Compounds.2008; 449(1-2): 304. CrossRef
Characteristics of (Fe, M)S₂ (M=Co, Ni, Mo) Composite Powders Fabricated by MCP
Woo Hyun Jung, Dong Kyu Park, Kwang Chul Jung, Se Hoon Suck, In Sup Ahn, Ki Won Kim
Materials Science Forum.2007; 534-536: 17. CrossRef

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