$YBa_2Cu_3O_x$초전도체의 액상 소결과 $Y_2BaCuO_5$를 이용한 입자 크기 제어

Liquid-Phase Sintering of $YBa_2Cu_3O_x$ Ceramic Superconductor and Grain Size Control Using $Y_2BaCuO_5$

  • 노광수 (한국과학기술원 재료공학과) ;
  • 이정용 (한국과학기술원 재료공학과) ;
  • 위당문 (한국과학기술원 재료공학과)
  • 발행 : 1990.03.01

초록

YBa2Cu3Ox ceramics superconductors fabricated using solid state reaction usually contain second phases, such as BaCuO2 and CuO. These second phases are located long the grain boundaries and enhance the abnormal growth of YBa2Cu3Ox grains and, consequently, generate the microcracks. These second phaases were reduced by adding Y2BaCuO5 into solid state reacted YBa2Cu3Ox ceramics. Y2BaCuO5 reacts with grain boundary second phases and reduces the grian size of the ceramics. It was observed the critical current density was improved by adding Y2BaCuO5 into solid state reacted YBa2Cu3Ox ceramic superconductor.

키워드

참고문헌

  1. Adv. Cer. Mat. v.2 Phase Equilibiria and Crystal Chemistry in System Ba-Y-Cu-O R.S. Roth;K.L. Davis;J.R. Dennis
  2. Adv. Cer. Mat. v.2 Problems in the Production of YBa₂Cu₃$O_x$ Superconducting Wire R.W. McCallum(et. al)
  3. Adv. Cer. Mat. v.2 Transport Critical Current in Bulk Sintered YBa₂Cu₃$O_x$ and Possibilities for its Enhencement J.W. Ekin
  4. MRS Bull. v.13 Crystal Growth of High Temperature Superconductors H.J. Scheel;F. Licci
  5. MRS Bull. v.16 High Tc Superconducting Thin Films R.B. Laibowitz
  6. IEEE Trans. Mag. v.25 Grain Size Control in Powder Processed Y₁Ba₂Cu₃$O_x$ K. No;J.D. Verhoeven;R.W. McCallum;E.D. Gibson
  7. MRS Bull. v.16 Novel Preparation Methods for High Tc Oxide Superconductors W.J. Nellis;L.D. Woolf
  8. Chemistry of High-Temperature Superconductors Synthesis, Chemistry, Electronic Properties and Magnetism in the Y-Ba-Cu-O Superconductor Systems R. Jones(et. al.)
  9. J. Mat. Res. v.3 Liquidus Relations in Y-Ba-Cu Oxides T. Aselage;K. Keefer