서지주요정보
Cu 기판을 이용한 YBCO 초전도체 선재의 제작과 분석 = Fabrication and characterization of screen-printed YBCO superconductors on Cu plates
서명 / 저자 Cu 기판을 이용한 YBCO 초전도체 선재의 제작과 분석 = Fabrication and characterization of screen-printed YBCO superconductors on Cu plates / 황현석.
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014027

소장위치/청구기호

학술문화관(문화관) 보존서고

MMS 03041

휴대폰 전송

도서상태

이용가능

대출가능

반납예정일

리뷰정보

초록정보

Copper, one of the 3 elements in $YBa_2Cu_3O_{7-x}$ superconductor, is generally used as a material for power cable due to good electrical and mechanical properties. Objective of this research is to fabricate and investigate screen-printed YBCO superconductor films on Cu plates by reaction between Cu-free $Y_2O_3 & BaCO_3$ melt and Cu substrates. At first, for stoichiometry of $Y_1Ba_2Cu_3O_{7-x}$ superconductor, the mixing ratio of Y and Ba was fixed at 1 : 2, and from $Y_2O_3$, BaO and CuO ternary phase diagram, we obtained the liquid phase reaction temperature, 950℃ and 980℃. We can observe CuO and Ba-Cu oxide phases from XRD patterns of reacted samples at 950℃ and 980℃ for 3min, and from SEM images of the cross section of the samples, we can observe that reacted region was composed of 3 layers, Cu oxide/middle part/Cu oxide. Because oxidation of Cu is intensive over 900℃, CuO layer formed on the surfaces of the reacted samples. According to EDS line scan data and WDS mapping data of the cross section of the samples, most Y and Ba existed in the middle part of the samples. For investigation of ground surface of the samples, samples were ground with SiC paper(s.c 600) with various grinding thickness, and ground surface was investigated using XRD and EDS. Differences of the phase distribution on the ground surface of the samples reacted at 950℃ and 980℃ were investigated and Tc(critical temperature) was measured by 4-point probe method about the surface existing Y123 phases. The resistance decreased rapidly before the temperature was lower than 74 K. But zero resistance was not observed possibly because of the impurity phases mixed with Y123.

서지기타정보

서지기타정보
청구기호 {MMS 03041
형태사항 vi, 91 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Hyun-Seok Hwang
지도교수의 한글표기 : 노광수
지도교수의 영문표기 : Kwang-Soo No
학위논문 학위논문(석사) - 한국과학기술원 : 재료공학과,
서지주기 참고문헌 : p. 89-91
주제 스크린 프린팅
연마
고온 초전도체
임계온도
YBCO
screen printing
Cu
grinding
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