DC Field | Value | Language |
---|---|---|
dc.contributor.advisor | Yun, Jong-Il | - |
dc.contributor.advisor | 윤종일 | - |
dc.contributor.author | Cha, Han Lim | - |
dc.date.accessioned | 2023-06-22T19:34:20Z | - |
dc.date.available | 2023-06-22T19:34:20Z | - |
dc.date.issued | 2023 | - |
dc.identifier.uri | http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=1030647&flag=dissertation | en_US |
dc.identifier.uri | http://hdl.handle.net/10203/308657 | - |
dc.description | 학위논문(박사) - 한국과학기술원 : 원자력및양자공학과, 2023.2,[vi, 96 p. :] | - |
dc.description.abstract | In order to develop electrometallurgical recycling processes of spent nuclear fuel and used Zr-alloy fuel cladding, it is necessary to clearly understand the electrochemical behavior and electrodeposition characteristics of Zr in molten LiCl-KCl eutectic salt. In this dissertation, a complete understanding of the redox mechanism of Zr and the development of a technique that selectively electrodeposits Zr metal on the electrode are achieved. First, the pulsed potential electrodeposition of the Zr species is demonstrated. A new reduction step of Zr species is discovered by cyclic-voltammetry analysis with a Zr electrode. Based on the cyclic voltammetry results, pulsed potential electrodepositions are performed in each reduction step. The characterization result of deposits confirmed that Zr metal could be selectively deposited on the W electrode. Subsequently, the oxidation mechanism of Zr is studied by utilizing Zr as the electrode for anodic dissolution experiments. A real-time optical monitoring system is utilized for optically scrutinizing the dissolution processes. The formation of a thin film layer on the Zr electrode is observed during passive dissolution. Also, a unique phenomenon is reported: an agglomerate is formed on the Zr electrode surface during transpassive dissolution. The chemical analysis results show that the agglomerate consists of potassium hexachlorozirconate (K2ZrCl6) and LiCl-KCl. The agglomerate formation is due to the Zr(IV) solubility limit in molten LiCl-KCl eutectic salt. | - |
dc.language | eng | - |
dc.publisher | 한국과학기술원 | - |
dc.subject | Zirconium▼aMolten LiCl-KCl eutectic salt▼aRedox mechanism▼aElectrodeposition▼aReal-time optical monitoring▼aPulsed potential electrodeposition | - |
dc.subject | 지르코늄▼aLiCl-KCl 공융염▼a산화환원 메커니즘▼a전착▼a실시간 광학 모니터링▼a펄스전압전착법 | - |
dc.title | Electrochemical behavior and electrodeposition of zirconium in molten LiCl-KCl eutectic salt | - |
dc.title.alternative | LiCl-KCl 공융염 환경 내 지르코늄의 전기화학적 거동 및 전착 특성 규명 | - |
dc.type | Thesis(Ph.D) | - |
dc.identifier.CNRN | 325007 | - |
dc.description.department | 한국과학기술원 :원자력및양자공학과, | - |
dc.contributor.alternativeauthor | 차한림 | - |
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