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- Characterization of Classification of Synthesized Ni Nanopowders by Pulsed Wire Evaporation Method
- Joong-Hark Park, Geon-Hong Kim, Dong-Jin Lee, Soon-Jik Hong
- J Korean Powder Metall Inst. 2017;24(5):389-394. Published online October 1, 2017
- DOI: https://doi.org/10.4150/KPMI.2017.24.5.389
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Abstract
PDF Ni wires with a diameter and length of 0.4 and 100 mm, respectively, and a purity of 99.9% are electrically exploded at 25 cycles per minute. The Ni nanopowders are successfully synthesized by a pulsed wire evaporation (PWE) method, in which Ar gas is used as the ambient gas. The characterization of the nanopowders is carried out using X-ray diffraction (XRD) and a high-resolution transmission electronmicroscope (HRTEM). The Ni nanopowders are classified for a multilayer ceramic condenser (MLCC) application using a type two Air-Centrifugal classifier (model: CNI, MP-250). The characterization of the classified Ni nanopowders are carried out using a scanning electron microscope (SEM) and particle size analysis (PSA) to observe the distribution and minimum classification point (minimum cutting point) of the nanopowders.
- The Effects of MoS2 Addition on the Mechanical Properties of Fe-Cr-Mn-C-V P/M Alloy
- Geon-Hong Kim, Hyun Seok Yang, Man-Sik Kong
- J Korean Powder Metall Inst. 2014;21(4):294-300. Published online August 1, 2014
- DOI: https://doi.org/10.4150/KPMI.2014.21.4.294
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Abstract
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The connecting rod is one of the most important parts in automotive engines, transforming the reciprocal motion of a piston generated by internal combustion into the rotational motion of a crankshaft. Recent advances in high performance automobile engines demand corresponding technological breakthroughs in the materials for engine parts. In the present research, the powder metallurgy (P/M) process was used to replace conventional quenching and/or tempering processes for mass production and ultimately for more cost-efficient manufacturing of high strength connecting rods. The development of P/M alloy powder was undertaken not only to achieve the improvement in mechanical properties, but also to enhance the machinability of the P/M processed connecting rods. Specifically MoS2 powders were added as lubricants to non-normalizing Fe-Cr-Mn-V-C alloy powder to improve the post-sintering machinability. The effects of MoS2 addition on the microstructure, mechanical properties, and machining characteristics were investigated.
- Optimization of Wet Reduction Processing for Nanosized Cobalt Powder
- Hyun-Seon Hong, Hang-Chul Jung, Geon-Hong Kim, Lee-Seung Kang, Han-Gil Suk
- J Korean Powder Metall Inst. 2013;20(3):191-196.
- DOI: https://doi.org/10.4150/KPMI.2013.20.3.191
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- 1 Citations
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Abstract
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- Nano-sized cobalt powder was fabricated by wet chemical reduction method at room temperature. The effects of various experimental variables on the overall properties of fabricated nano-sized cobalt powders have been investigated in detail, and amount of NaOH and reducing agent and dropping speed of reducing agent have been properly selected as experimental variables in the present research. Minitab program which could find optimized conditions was adopted as a statistic analysis. 3D Scatter-Plot and DOE (Design of Experiments) conditions for synthesis of nano-sized cobalt powder were well developed using Box-Behnken DOE method. Based on the results of the DOE process, reproducibility test were performed for nano-sized cobalt powder. Spherical nano-sized cobalt powders with an average size of 70-100 nm were successfully developed and crystalline peaks for the HCP and FCC structure were observed without second phase such as Co(OH)_2.
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Citations to this article as recorded by
- Preparation of Spherical Cobalt Fine Powders by New Liquid Reduction Method
Dae Weon Kim, Ji-Hoon Kim, Yo-Han Choi, Hee Lack Choi, Jin-Ho Yoon
journal of Korean Powder Metallurgy Institute.1970; 22(4): 260. CrossRef
- Preparation of Spherical Cobalt Fine Powders by New Liquid Reduction Method
- Recovery of Copper Powder form MoO3 Leaching Solution Using Cementation Reaction System
- Geon-Hong Kim, Hyun-Seon Hong, Hang-Chul Jung
- J Korean Powder Metall Inst. 2012;19(6):405-411.
- DOI: https://doi.org/10.4150/KPMI.2012.19.6.405
- 137 View
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- 2 Citations
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- Recovery of copper powder from copper chloride solution used in MoO_3 leaching process was carried out using a cementation method. Cementation is a simple and economical process, necessitating less energy compared with other recovery methods. Cementation utilizes significant difference in standard reduction potential between copper and iron under standard condition. In the present research, Cementation process variables of temperature, time, and added amount of iron scraps were optimized by using design of experiment method and individual effects on yield and efficiency of copper powder recovery were investigated using bench-scale cementation reaction system. Copper powders thus obtained from cementation process were further characterized using various analytical tools such as XRF, SEM-EDS and laser diffraction and scattering methods. Cementation process necessitated further purification of recovered copper powders and centrifugal separation method was employed, which successfully yielded copper powders of more than 99.65% purity and average 1µm in size.
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Citations
Citations to this article as recorded by- Recovery of Tin as Tin oxide nanoparticles from waste printed circuit boards for photocatalytic dye degradation
Dina Magdy Abdo, Sabah Mohamed Abdelbasir, Shakinaz Taha El-Sheltawy, Ibrahim Ahmed Ibrahim
Korean Journal of Chemical Engineering.2021; 38(9): 1934. CrossRef - Development of Pre-treatment for Tin Recovery from Waste Resources
Y.H. Jin, D.H. Jang, H.C. Jung, K.W. Lee
Journal of Korean Powder Metallurgy Institute.2014; 21(2): 142. CrossRef
- Recovery of Tin as Tin oxide nanoparticles from waste printed circuit boards for photocatalytic dye degradation
- Preparation of the Nano Cobalt Powder by Wet Chemical Reduction Method
- Hyun-Seon Hong, Young-Dae Ko, Lee-Seung Kang, Geon-Hong Kim, Hang-Chul Jung
- J Korean Powder Metall Inst. 2011;18(3):244-249.
- DOI: https://doi.org/10.4150/KPMI.2011.18.3.244
- 129 View
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- 6 Citations
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Abstract
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- Spherical nanosized cobalt powder with an average size of 150-400 nm was successfully prepared at room temperature from cobalt sulfate heptahydrate (CoSO_4cdot7H_2O). Wet chemical reduction method was adopted to synthesize nano cobalt powder and hypophosphorous acid (H_3PO_2) was used as reduction agent. Both the HCP and the FCC Co phase were developed while CoSO_4cdot7H_2O concentration ranged from 0.7 M to 1.1 M. Secondary phase such as Co(OH)_2 and CO_3O_4 were also observed. Peaks for the crystalline Co phase having HCP and FCC structure crystallized as increasing the concentration of H_3PO_2, indicating that the amount of reduction agent was enough to reduce Co(OH)_2. Consequently, a homogeneous Co phase could be developed without second phase when the H_3PO_2/CoSO_4cdot7H_2O ratio exceeded 7.
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Citations
Citations to this article as recorded by- First-principles calculations to investigate electrochemical performance, storage mechanism and magnetocaloric effect of LiFeBO3 for lithium-ion batteries and magnetic refrigerants
Othmane Mennaoui, Rachid Masrour, Ling Xu, El Kebir Hlil
Ionics.2024; 30(5): 2537. CrossRef - Spark plasma sintering of WC–Co tool materials prepared with emphasis on WC core–Co shell structure development
Sungkyu Lee, Hyun Seon Hong, Hyo-Seob Kim, Soon-Jik Hong, Jin-Ho Yoon
International Journal of Refractory Metals and Hard Materials.2015; 53: 41. CrossRef - Coating of Cobalt Over Tungsten Carbide Powder by Wet Chemical Reduction Method
Hyun-Seon Hong, Jin-Ho Yoon
Journal of Korean Powder Metallurgy Institute.2014; 21(2): 93. CrossRef - Optimization of Wet Reduction Processing for Nanosized Cobalt Powder
Hyun-Seon Hong, Hang-Chul Jung, Geon-Hong Kim, Lee-Seung Kang, Han-Gil Suk
Journal of Korean Powder Metallurgy Institute.2013; 20(3): 191. CrossRef - Synthesis and Characterization of CoFe2O4/SiO2using Cobalt Precursors from Recycling Waste Cemented Carbide
Ri Yu, Jae-Hwan Pee, Yoo-Jin Kim
Journal of the Korean Ceramic Society.2011; 48(5): 454. CrossRef - Preparation of Spherical Cobalt Fine Powders by New Liquid Reduction Method
Dae Weon Kim, Ji-Hoon Kim, Yo-Han Choi, Hee Lack Choi, Jin-Ho Yoon
journal of Korean Powder Metallurgy Institute.1970; 22(4): 260. CrossRef
- First-principles calculations to investigate electrochemical performance, storage mechanism and magnetocaloric effect of LiFeBO3 for lithium-ion batteries and magnetic refrigerants
- Research and Development Status of Low-Cost Fe-based Cathode Materials for Lithium Secondary Batteries
- Hyun-Seon Hong, Young-Dae Ko, Lee-Seung Kang, Hang-Chul Jung, Geon-Hong Kim
- J Korean Powder Metall Inst. 2011;18(2):196-203.
- DOI: https://doi.org/10.4150/KPMI.2011.18.2.196
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- 3 Citations
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Citations
Citations to this article as recorded by-
Study of storage mechanism and the electrochemical performance of
LiMnBO
3
for lithium‐ion batteries
Othmane Mennaoui, Rachid Masrour, Abderrahim Jabar, El Kebir Hlil
International Journal of Energy Research.2022; 46(14): 19875. CrossRef - Solvent Extraction of Co, Ni and Mn from NCM Sulfate Leaching Solution of Li(NCM)O2 Secondary Battery Scraps
Hyun Seon Hong, Dae Weon Kim, Hee Lack Choi, Sung-Soo Ryu
Archives of Metallurgy and Materials.2017; 62(2): 1011. CrossRef - Synthesis and characterization of LiMnBO3 cathode material for lithium ion batteries
Kun-Jae Lee, Lee-Seung Kang, Sunghyun Uhm, Jae Sik Yoon, Dong-Wan Kim, Hyun Seon Hong
Current Applied Physics.2013; 13(7): 1440. CrossRef
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Study of storage mechanism and the electrochemical performance of
LiMnBO
3
for lithium‐ion batteries
- Overview and Future Concerns for Lithium-Ion Batteries Materials
- Hang-Chul Jung, Geon-Hong Kim, Hyun-Seon Hong, Dong-Wan Kim
- J Korean Powder Metall Inst. 2010;17(3):175-189.
- DOI: https://doi.org/10.4150/KPMI.2010.17.3.175
- 94 View
- 5 Download
- 12 Citations
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Citations
Citations to this article as recorded by- Fabrication of Nanowire by Electrospinning Process Using Nickel Oxide Particle Recovered from MLCC
Haein Shin, Jongwon Bae, Minsu Kang, Kun-Jae Lee
journal of Korean Powder Metallurgy Institute.2023; 30(6): 502. CrossRef - Changes in Electrical Properties of Copper-Plated Layer by Organic Additives on High Current Density
Tae-Gyu Woo, Il-Song Park
Korean Journal of Metals and Materials.2020; 58(1): 41. CrossRef - A Study on the Recovery of Li<sub>2</sub>CO<sub>3</sub> from Cathode Active Material NCM(LiNiCoMnO<sub>2</sub>) of Spent Lithium Ion Batteries
Jei-Pil Wang, Jae-Jung Pyo, Se-Ho Ahn, Dong-Hyeon Choi, Byeong-Woo Lee, Dong-Won Lee
Journal of Korean Powder Metallurgy Institute.2018; 25(4): 296. CrossRef - Effect of Gelatin and Chloride Ions on the Mechanical Properties and Microstructural Evolution of Copper Foil
Tae-Gyu Woo, Man-Hyung Lee, Kyeong-Won Seol
Korean Journal of Metals and Materials.2018; 56(7): 518. CrossRef - Main Effects of Plating Parameters on Mechanical and Surface Properties of Electroplated Copper
Tae-Gyu Woo, Il-Song Park, Kyeong-Won Seol
Korean Journal of Metals and Materials.2018; 56(6): 459. CrossRef - Solvent Extraction of Co, Ni and Mn from NCM Sulfate Leaching Solution of Li(NCM)O2 Secondary Battery Scraps
Hyun Seon Hong, Dae Weon Kim, Hee Lack Choi, Sung-Soo Ryu
Archives of Metallurgy and Materials.2017; 62(2): 1011. CrossRef - The effect of additives and current density on mechanical properties of cathode metal for secondary battery
Tae-Gyu Woo, Il-Song Park, Kyeong-Won Seol
Electronic Materials Letters.2013; 9(4): 535. CrossRef - Recovery of Lithium and Leaching Behavior of NCM Powder by Carbon Reductive Treatment from Li(NCM)O2System Secondary Battery Scraps
Dae Weon Kim, Seong Tae Jang
Journal of the Korean Institute of Resources Recycling.2013; 22(4): 62. CrossRef - Recovery of Lithium and Leaching Behavior of NCM Powder by Hydrogen Reductive Treatment from NCM System Li-ion Battery Scraps
Dae Weon Kim, Seong Tae Jang, Kyung Min Baek
Journal of the Korean Institute of Resources Recycling.2013; 22(3): 43. CrossRef - Industrial Supply Chain Trend of Domestic Tungsten
Joon-Woo Song, Sang-Hyun Lee, Hyun-Seon Hong, Hong-Yoon Kang, Soon-Jik Hong
Journal of Korean Powder Metallurgy Institute.2012; 19(1): 79. CrossRef - Research and Development Status of Low-Cost Fe-based Cathode Materials for Lithium Secondary Batteries
Hyun-Seon Hong, Young-Dae Ko, Lee-Seung Kang, Hang-Chul Jung, Geon-Hong Kim
Journal of Korean Powder Metallurgy Institute.2011; 18(2): 196. CrossRef - Preparation of the Nano Cobalt Powder by Wet Chemical Reduction Method
Hyun-Seon Hong, Young-Dae Ko, Lee-Seung Kang, Geon-Hong Kim, Hang-Chul Jung
Journal of Korean Powder Metallurgy Institute.2011; 18(3): 244. CrossRef
- Fabrication of Nanowire by Electrospinning Process Using Nickel Oxide Particle Recovered from MLCC
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