- The Effect of Sintering Temperature on the Synthesis of Quartz glass by Fumed Silica Sintering
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J.H. Maeng, K.H. Yoon, S.C. Choi, H.J. Kim
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J Powder Mater. 2013;20(2):134-137.
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DOI: https://doi.org/10.4150/KPMI.2013.20.2.134
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- The quartz glasses were prepared by fumed silica powders sintering method at 1210°C, 1230°C, 1250°C in air and the effect of sintering temperature on their properties were investigated. The X-ray diffraction pattern, the OH concentration, the light transmittance, the apparent porosity and the density were analyzed. The transparent quartz glass were obtained above 1230°C. The OH-group and macroscopic pores were removed above 1230°C and highest density and light transmittance were obtained at 1250°C.
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Citations
Citations to this article as recorded by  - Impact Behavior for Successful Particle–Particle Bonding in Vacuum Kinetic Spraying
Hansol Kwon, Yeonju Kim, Hyungkwon Park, Changhee Lee
Journal of Thermal Spray Technology.2021; 30(3): 542. CrossRef - Development and Effect Analysis of UVB-LED General Lighting to Support Vitamin D Synthesis
Seung-Taek Oh, Jae-Hyun Lim
Applied Sciences.2020; 10(3): 889. CrossRef
- The Effect of Calcination Temperature on the Synthesis of Quartz glass by Fumed Silica Sintering
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J.H. Maeng, K.H. Yoon, D.W. Shin, S.C. Choi, T.Y. Lim, H.J. Kim
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J Korean Powder Metall Inst. 2012;19(6):412-415.
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DOI: https://doi.org/10.4150/KPMI.2012.19.6.412
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- The quartz glasses were prepared by sintering of fumed silica powders and the effect of OH concentration on their surface on sintering was studied. Through the firing process, the fumed silica was crystallized from 1180 to 1260°C region. The amount of hydroxyl group decreased with increase in calcination temperature and consequently the crystallization was prevented. A transparent quartz glass was obtained from fumed silica, previously calcined at 1000°C, by the sintering at 1250°C for 1 h.
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Citations
Citations to this article as recorded by - Fabrication of transparent amorphous silica by controlling forming and sintering processes with spherical nano-silica powder
Yoo Kyoung Ahn, Dong Hwi Kim, Hyung Sup Lim, Sang Jin Lee
Journal of the Korean Ceramic Society.2022; 59(6): 787. CrossRef - The Effect of Sintering Temperature on the Synthesis of Quartz glass by Fumed Silica Sintering
J.H. Maeng, K.H. Yoon, S.C. Choi, H.J. Kim
Journal of Korean Powder Metallurgy Institute.2013; 20(2): 134. CrossRef
- Production of Fe Amorphous Powders by Gas-Atomization Process and Subsequent Spark Plasma Sintering of Fe amorphous-ductile Cu Composite Powder Produced by Ball-milling Process (II) - II. SPS Behaviors of Composite Powders and their Characteristics -
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Jin-Chun Kim, Ji-Soon Kim, H.J. Kim, Jeong-Gon Kim
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J Korean Powder Metall Inst. 2009;16(5):326-335.
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DOI: https://doi.org/10.4150/KPMI.2009.16.5.326
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Abstract
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- Fe based (Fe_68.2C_5.9Si_3.5B_6.7P_9.6Cr_2.1Mo_2.0Al_2.0) amorphous powder, which is a composition of iron blast cast slag, were produced by a gas atomization process, and sequently mixed with ductile Cu powder by a mechanical ball milling process. The Fe-based amorphous powders and the Fe-Cu composite powders were compacted by a spark plasma sintering (SPS) process. Densification of the Fe amorphous-Cu composited powders by spark plasma sintering of was occurred through a plastic deformation of the each amorphous powder and Cu phase. The SPS samples milled by AGO-2 under 500 rpm had the best homogeneity of Cu phase and showed the smallest Cu pool size. Micro-Vickers hardness of the as-SPSed specimens was changed with the milling processes.
- Production of Fe Amorphous Powders by Gas-atomization Process and Subsequent Spark Plasma Sintering of Fe Amorphous-ductile Cu Composite Powders Produced by Ball-milling Process (I) - I. Gas Atomization and Production of Composite Powders -
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Ho-Jin Ryu, Jae-Hyun Lim, Ji-Soon Kim, Jin-Chun Kim, H.J. Kim
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J Korean Powder Metall Inst. 2009;16(5):316-325.
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DOI: https://doi.org/10.4150/KPMI.2009.16.5.316
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Abstract
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- Fe based (Fe_68.2C_5.9Si_3.5B_6.7P_9.6Cr_2.1Mo_2.0Al_2.0) amorphous powder, which is a composition of iron blast cast slag, were produced by a gas atomization process, and sequently mixed with ductile Cu powder by a mechanical ball milling process. The experiment results show that the as-prepared Fe amorphous powders less than 90 mum in size has a fully amorphous phase and its weight fraction was about 73.7%. The as-atomized amorphous Fe powders had a complete spherical shape with very clean surface. Differential scanning calorimetric results of the as-atomized Fe powders less than 90 mum showed that the glass transition, T_g, onset crystallization, T_x, and super-cooled liquid range DeltaT=T_x-T_g were 512, 548 and 36°C, respectively. Fe amorphous powders were mixed and deformed well with 10 wt.% Cu by using AGO-2 high energy ball mill under 500 rpm.
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