Journal of Powder Materials

Sang-Hyun Lee

2 Articles

Industrial Supply Chain Trend of Domestic Tungsten: Joon-Woo Song, Sang-Hyun Lee, Hyun-Seon Hong, Hong-Yoon Kang, Soon-Jik Hong; J Korean Powder Metall Inst. 2012;19(1):79-86.; DOI: https://doi.org/10.4150/KPMI.2012.19.1.079

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Extraction Factor Of Tungsten Sources From Tungsten Scraps By Zinc Decomposition Process
J.-H. Pee, G.H. Kim, H.Y. Lee, Y.J. Kim
Archives of Metallurgy and Materials.2015; 60(2): 1311. CrossRef
Microstructure and Elevated Temperature Strength of W-ZrC Composites with Micrometric and Nanosized ZrC Particles
Yoon Soo Han, Sung-Soo Ryu
Journal of Korean Powder Metallurgy Institute.2014; 21(6): 415. CrossRef
Investigation of Material Flow and Industrial Trend of Domestic Europium
Han-Jin Ko, Jeong-Gon Kim, Il-Seuk Lee, Hong-Yoon Kang, Soon-Jik Hong
Journal of Korean Powder Metallurgy Institute.2013; 20(5): 382. CrossRef

Synthesis of Carbon Nanotubes by Chemical Method at Warm Temperatures: Jung-Ho Ahn, Sang-Hyun Lee, Yong-Jin Kim, Byung-Sik Chung; J Korean Powder Metall Inst. 2006;13(5):305-312.; DOI: https://doi.org/10.4150/KPMI.2006.13.5.305

Abstract PDF: Amorphous carbon nanotubes were synthesized by a reaction of benzene, ferrocene and Na mixture in a small autoclave at temperatures as low as 400°C. The resulting carbon nanotubes were short and straight, but their inner hole was filled with residual products. The addition of quartz to the reacting mixture considerably promoted the formation of carbon nanotubes. A careful examination of powder structure suggested that the nanotubes in this process were mainly formed by surface diffusion of carbon atoms at the surface of solid catalytic particles, not by VLS(vapor-liquid-solid) mechanism.

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