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RABiTS 위에 PLD 방법으로 증착된 YBCO 초전도 박막 선재의 제조
고락길,정준기,하홍수,김호섭,송규정,박찬,문승현,유상임,김영철,Ko Rock-Kil,Shi Dongqi,Chung Jun-Ki,Ha Hong-Soo,Kim Ho-Soup,Song Kyu-Jeong,Park Chan,Moon Seung-Hyun,Yoo Sang Im,Kim Young-Cheol 한국초전도학회 2004 Progress in superconductivity Vol.6 No.1
YBCO coated conductor is one of the most promising materials as a new generations wire especially for practical power applications. In this work, $YBa_2$$Cu_3$$O_{7}$ -$\delta$/(YBCO) coated conductors (CC) were deposited by pulsed laser deposition (PLD) from buffer layers to superconducting layer on hi-axially textured metal tape. The oxide multilayer buffered substrate of architectures of $CeO_2$/$YSZ/Y_2$$O_3$ was fabricated by PLD at steady status. Then YBCO layer was deposited on RABiTS substrate by stationary and reel-to-reel (R2R) continuous process and we compared with deposition conditions of both processes. The degree of texture of each layer was investigated using X-ray diffraction including $\theta$-2$\theta$ scans, $\omega$-scans and $\Phi$-scans analysis. Their surface morphology was observed by scanning electron microscopy (SEM). The FWHM of the X-ray $\Phi$-scans and $\Phi$-scans indicated that YBCO and buffer layers closely replicate the in-plane and out-of-plane texture of metal tape. Critical current (Ic) at 77 K, self-field of 75.8 A/cm-width, critical temperature (Tc) of 85 K, and critical current density (Ic) of 3.7 MA/$\textrm{cm}^2$ were measured from coated conductor deposited by stationary process. And coated conductor deposited by R2R continuous process had Ic of 57.5 A/cm-width, Tc of 86.5 K and Jc of 2.0 MA/$\textrm{cm}^2$. The film also exhibits a homogeneous and dense surface morphology.
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산업용 전기집진 장비에서의 오존(O3)발생에 대한 산업기준 필요성과 저감방안 연구
김영수(Young-Soo Kim),황준호(Jun-Ho Hwang),유홍수(Hong-Soo Yoo),임형길(Hyung-Gil Im),김정훈(Jung-Hoon Kim),심재석(Jae-Seok Sim),최갑봉(Gap-Bong Choi) 한국철도학회 2016 한국철도학회 학술발표대회논문집 Vol.2016 No.10
미세먼지(PM10)와 초미세먼지(PM2.5)에 대한 사회적 관심이 높아지면서 대중의 이용률이 높은 다중 이용시설 에서는 다양한 저감 대책과 측정기술이 적용되고 있다. 특히 국내외 미세먼지 관리대상 시설의 공조 설비에 유지관리 효율이 높은 전기집진장비(Electrostatic Precipitator, EP)의 사용비중이 늘어나고 있으나, 이에 따른 표준화된 오존 측정절차나 정확한 관리기준이 미흡한 상태이다. 본 논문에서는 현재 주로 사용되고 있는 부코로나(negative corona, 이하 NC)방식의 전기 집진장비에 대한 오존 발생 현황을 분석하고, 밀폐된 공간 혹은 지하 터널에서의 전기 집진설비 사용으로 발생한 오존의 표준화된 측정방법과 기준치 설정 필요성 및 효율적인 저감 방안을 모색코자 한다. Increasing social interest in the fine dust (PM10) and ultra-fine dust (PM2.5), the utilization rate is high multiple use facilities of the masses, various reduction measures and measurement techniques have been applied. In particular, the efficiency of the maintenance on air conditioning equipment of the managed facilities at home and abroad of the fine dust is increasing the proportion of high electrostatic precipitator (Electrostatic Precipitator, EP). But, Standardized ozone measurement procedures and accurate management criteria associated with this is an unsatisfactory state. In this paper, to analyze current, mainly being used are part corona (negative corona, following NC) ozone generation status of the system of electrostatic precipitator. Also Attempting to seek a sealed necessity of setting standardized measurement methods and reference values of ozone generated by the use of electrostatic precipitator in space or underground tunnels and effective reduction measures.
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연속 공정 PVD 방법에 의한 Coated Conductor 제조
고락길,정준기,김호섭,하홍수,송규정,박찬,유상임,문승현,김영철,Ko, Rock-Kil,Chung, Jun-Ki,Kim, Ho-Sup,Ha, Hong-Soo,Shi, Dongqi,Song, Kyu-Jeong,Park, Chan,Yoo, Sang-Im,Moon, Seung-Hyun,Kim, Young-Cheol 한국전기전자재료학회 2004 전기전자재료학회논문지 Vol.17 No.11
Continuous physical vapor deposition (PVD) method is one of many processes to fabricate long length coated conductor which is required for successful large-scale application of superconducting power devices. Three film deposition systems (pulsed laser deposition, sputtering, and evaporation) equipped with reel-to-reel(R2R) metal tape moving apparatus were installed and used to deposit multi-layer oxide thin films. Both RABiTS and IBAD texture templates are used. IBAD template consists of CeO$_2$(PLD)/YSZ(IBAD) on stainless steel(SS) metal tape, and RABiTS template has the structure of CeO$_2$/YSZ/Y$_2$O$_3$ which was continuously deposited on Ni-alloy tape using R$_2$R evaporation and DC reactive sputtering in a deposition system designed to do both processes. 0.4 m-long coated conductor with Ic(77 K) of 34 A/cm was fabricated using RABiTS template. 0.5 m and 1.1 m-long coated conductor with Ic(77 K) of 41 A/cm and 26 A/cm were fabricated using IBAD template.
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