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김삼중,서동수,엄태형,송경섭,노재승,Kim Sam-Joong,Suhr Dong-Soo,Eom Tae-Hyoung,Song Kyung-Sub,Roh Jea-Seung 한국재료학회 2004 한국재료학회지 Vol.14 No.5
The influences of the ozone oxidation, reaction temperature and NaOH equivalent ratio on the iron oxide formation were studied with fixed ferrous sulfate concentration(0.5M $FeSO_4$ㆍ$7H_2$O). Geothite($\alpha$-FeOOH) and/or Magnetite ($Fe_3$$O_4$) were synthesized depending on the reaction conditions. The characteristics of the synthesized powders were evaluated by XRD, SEM and quantitative phase analysis. The synthetic conditions to get Goethite were quite different from the results of Kiyama's and the Goethite was conveniently synthesized at low temperature and at low NaOH equivalent ratio.
김삼중,엄태형,왕웨이,서동수,Kim, Sam-Joong,Eom, Tae-Hyoung,Wang, Wei,Suhr, Dong-Soo 한국재료학회 2008 한국재료학회지 Vol.18 No.4
A $Fe(OH)_2$ suspension was prepared by mixing iron sulfate and a weak alkali ammonia solution. Following this, iron oxides were synthesized by passing pure oxygen through the suspension (oxidation). The effects of different reaction temperatures ($30^{\circ}C$, $50^{\circ}C$, $70^{\circ}C$) and equivalent ratios ($0.1{\sim}10.0$) on the formation of iron oxides were investigated. An equilibrium phase diagram was established by quantitative phase analysis of the iron oxides using the Rietveld method. The equilibrium phase diagram showed a large difference from the equilibrium phase diagram of Kiyama when the equivalent ratio was above 1, and single $Fe_3O_4$ phase only formed above an equivalent ratio 2 at all reaction temperatures. Kiyama synthesized iron oxide using iron sulfate and a strong alkali NaOH solution.
김삼중 한국기술사회 2001 技術士 Vol.34 No.5
축구경기와 각종 이벤트행사 등에 다목적으로 사용할 수 있도록 건축음향과 전기음향이 조화를 이루는 세계 수준의 음향설비 설치 The purpose of this report is to describe the design of the sound system for the new World Cup Main Stadium, along with relevant design criteria and document its expected acoustical performance .
황산제일철 용애그이 오존산화에 의한 FeOOH 합성(오존농도 및 반응시간의 영향)
김삼중,송경섭,엄태형,서동수,Kim Sam-Joong,Song Kyung-Sub,Eom Tae-Hyoung,Suhr Dong-Soo 한국재료학회 2005 한국재료학회지 Vol.15 No.12
The influences of the oxidant($O_2\;and\;O_3$) on the FeOOH formation were studied with fixed $FeSO_4{\cdot}7H_2O$ concentration (0.5M) and NaOH equivalent ratio(0.5). The characteristics of the synthesized powders were evaluateed by XRD, and equantitative phase analysis. $\alpha-FeOOH$ (Geothite) and/or $\gamma-FeOOH$ was promoted when $O_3$ was used as a oxidant which is stronger oxidizing agent than $O_2$.