Journal of Powder Materials

Young-In Lee

5 Articles

Low Temperature Debinding Process Using Oxygen Plasma for Flexible Printed Electronics: Young-In Lee; J Korean Powder Metall Inst. 2012;19(5):343-347.; DOI: https://doi.org/10.4150/KPMI.2012.19.5.343

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In this study, an oxygen plasma treatment was used as a low temperature debinding method to form a conductive copper feature on a flexible substrate using a direct printing process. To demonstrate this concept, conductive copper patterns were formed on polyimide films using a copper nanoparticle-based paste with polymeric binders and dispersing agents and a screen printing method. Thermal and oxygen plasma treatments were utilized to remove the polymeric vehicle before a sintering of copper nanoparticles. The effect of the debinding methods on the phase, microstructure and electrical conductivity of the screen-printed patterns was systematically investigated by FE-SEM, TGA, XRD and four-point probe analysis. The patterns formed using oxygen plasma debinding showed the well-developed microstructure and the superior electrical conductivity compared with those of using thermal debinding.

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Research on new ceramic debinding technology with low energy consumption via dielectric barrier discharge
Yimeng Huang, Yong Liu, Nianping Yan, Xuetong Zhao, Xinhao Zhao, Yueji Li, Xilin Wang, Zhidong Jia
Physica Scripta.2023; 98(4): 045904. CrossRef
Green Manufacturing of Highly Conductive Cu2O and Cu Nanoparticles for Photonic-Sintered Printed Electronics
Young-Tae Kwon, Seung-Jae Yune, Yoseb Song, Woon-Hong Yeo, Yong-Ho Choa
ACS Applied Electronic Materials.2019; 1(10): 2069. CrossRef
Fabrication of Micro Pattern on Flexible Substrate by Nano Ink using Superhydrophobic Effect
Soo-Jung Son, Young-Sang Cho, Jong Joo Rha, Chul-Jin Cho
Journal of Korean Powder Metallurgy Institute.2013; 20(2): 120. CrossRef

Synthesis and Characterization of Cu Nanowires Using Anodic Alumina Template Based Electrochemical Deposition Method: Young-In Lee, Yong-Ho Choa; J Korean Powder Metall Inst. 2012;19(5):367-372.; DOI: https://doi.org/10.4150/KPMI.2012.19.5.367

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Abstract PDF: Single crystalline Cu nanowires with controlled diameters and aspect ratios have been synthesized using electrochemical deposition within confined nanochannels of a porous anodic aluminium oxide(AAO) template. The diameters of nano-sized cylindrical pores in AAO template were adjusted by controlling the anodization conditions. Cu nanowires with diameters of approximately 38, 99, 274 nm were synthesized by the electrodeposition using the AAO templates. The crystal structure, morphology and microstructure of the Cu nanowires were systematically investigated using XRD, FE-SEM, TEM and SAED. Investigation results revealed that the Cu nanowires had the controlled diameter, high aspect ratio and single crystalline nature.

Synthesis of SnO₂ Nanotubes Via Electrospinning Process and Their Application to Lithium Ion Battery Anodes: Young-In Lee, Yong-Ho Choa; J Korean Powder Metall Inst. 2012;19(4):271-277.; DOI: https://doi.org/10.4150/KPMI.2012.19.4.271

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SnO_2 nanotubes were successfully synthesized using an electrospinning technique followed by calcination in air. The nanotubes were the single phase nature of SnO_2 and consisted of approximately 14 nm nanocrystals. SEM and TEM characterizations demonstrated that uniform hollow fibers with an average outer diameter of around 124 nm and wall thickness of around 25 nm were successfully obtained. As anode materials for lithium ion batteries, the SnO_2 nanotubes exhibited excellent cyclability and reversible capacity of 580mAhg-1 up to 25 cycles at 100mAg-1 as compared to SnO_2 nanoparticles with a capacity of sim200mAhg-1. Such excellent performance of the SnO_2 nanotube was related to the one-dimensional hollow structure which acted as a buffer zone during the volume contraction and expansion of Sn.

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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
A study on the synthesis of tin oxide crystalline by the liquid reduction precipitation method and hydrothermal process
Il-Jeong Park, Geon-Hong Kim, Dae-Weon Kim, Hee-Lack Choi, Hang-Chul Jung
Journal of the Korean Crystal Growth and Crystal Technology.2016; 26(3): 95. CrossRef
Improvement of Triboelectric Efficiency using SnO2 Friction Layer for Triboelectric Generator
No Ho Lee, Jae Rok Shin, Ji Een Yoo, Dong Hun You, Bon-Ryul Koo, Sung Woo Lee, Hyo-Jin Ahn, Byung Joon Choi
Journal of Korean Powder Metallurgy Institute.2015; 22(5): 321. CrossRef

Microstructure and Mechanical Properties of Al₂O₃/Fe-Ni Nanocomposite Prepared by Rapid Sintering: Young-In Lee, Kun-Jae Lee, Dae-Hwan Jang, Jae-Kyo Yang, Yong-Ho Cho; J Korean Powder Metall Inst. 2010;17(3):203-208.; DOI: https://doi.org/10.4150/KPMI.2010.17.3.203

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Abstract PDF: A new High Frequency Induction Heating (HFIH) process has been developed to fabricate dense Al_2O_3 reinforced with Fe-Ni magnetic metal dispersion particles. The process is based on the reduction of metal oxide particles immediately prior to sintering. The synthesized Al_2O_3/Fe-Ni nanocomposite powders were formed directly from the selective reduction of metal oxide powders, such as NiO and Fe_2O_3. Dense Al_2O_3/Fe-Ni nanocomposite was fabricated using the HFIH method with an extremely high heating rate of 2000°C/min. Phase identification and microstructure of nanocomposite powders and sintered specimens were determined by X-ray diffraction and SEM and TEM, respectively. Vickers hardness experiment were performed to investigate the mechanical properties of the Al_2O_3/Fe-Ni nanocomposite.

Research on Synthesis and Sintering Behavior of Nano-sized (Pb, La)TiO₃ Powders Using Mechano Chemical Process: Young-In Lee, Yong-Sung Goo, Jong-Sik Lee, Yong-Ho Choa; J Korean Powder Metall Inst. 2010;17(2):101-106.; DOI: https://doi.org/10.4150/KPMI.2010.17.2.101

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Abstract PDF: In this study, we successfully synthesized a nano-sized lanthanum-modified lead-titanate (PLT) powder with a perovskite structure using a high-energy mechanochemical process (MCP). In addition, the sintering behavior of synthesized PLT nanopowder was investigated and the sintering temperature that can make the full dense PLT specimen decreased to below 1050°C by using Bi_2O_3 powder as sintering agent. The pure PLT phase of perovskite structure was formed after MCP was conducted for 4 h and the average size of the particles was approximately 20 nm. After sintered at 1050 and 1150°C, the relative density of PLT was about 93.84 and 95.78%, respectively. The density of PLT increased with adding Bi_2O_3 and the specimen with the relative densitiy over 96% were fabricated below 1050°C when 2 wt% of Bi_2O_3 was added.

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