- Synthesis and Characterization of WS2 Nanoparticles by Chemical Vapor Condensation
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Dong-Won Lee, Ju-Hyeong Kim, O. Tolochko, Jung-Yeul Yun, Byung-Kee Kim
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J Korean Powder Metall Inst. 2008;15(4):314-319.
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DOI: https://doi.org/10.4150/KPMI.2008.15.4.314
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 Abstract
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- Nano-sized tungsten disulfide (WS_2) powders were synthesized by chemical vapor condensation (CVC) process using tungsten carbonyl (W(CO)_6) as precursor and vaporized pure sulfur. Prior to the synthesis of tungsten disulfide nanoparticles, the pure tungsten nanoparticles were produced by same route to define the optimum synthesis parameters, which were then successfully applied to synthesize tungsten disulfide. The influence of experimental parameters on the phase and chemical composition as well as mean size of the particles for the produced pure tungsten and tungsten disulfide nanoparticles, were investigated.
- Characteristics of L10 Ordered Fe50Pt50 Nanoparticles Synthesized by Chemical Vapor Condensation Process
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Gyeong-Mo Lee, Ji-Hun Yu, Dong-Won Lee, Byung-Kee Kim, Hyeok-Don Kim, Tae-Suk Jang
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J Korean Powder Metall Inst. 2007;14(5):281-286.
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DOI: https://doi.org/10.4150/KPMI.2007.14.5.281
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Abstract
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- Ordered L1_0 to FePt nanoparticles are strong candidates for high density magnetic data storage media because the L1_0 phase FePt has a very high magnetocrystalline anisotropy (K_usim6.6-10times107erg/cm3), high coercivity and chemical stability. In this study, the ordered L1_0 FePt nanoparticles were successfully fabricated by chemical vapor condensation process without a post-annealing process which causes severe particle growth and agglomeration. The Fe_50Pt_50 nanopowder was obtained when the mixing ratio of Fe(acac) and Pt(arac) was 2.5 : 1. And the synthesized FePt nanoparticles were very fine and spherical shape with a narrow size distribution. The average particle size of the powder tended to increase from 5 nm to 10 nm with increasing reaction temperature from 800°C to 1000°C. Characterisitcs of FePt nanopowder were investigated in terms of process parameters and microstructures.
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