Usefulness of a Low Grade $BaCO_3$ Powder as a Raw Material for the Fabrication of ${Y_2}{BaCuO_5}$ Excessive ${YBa_2}{Cu_3}{O_{7-y}}$ Superconductors

Choi, J.S. (Neutron Science Division, Korea Atomic Energy Research Institute) ;
Lee, J.H. (Department of physics, Korea Advanced Institute of Science and Technology) ;
Park, S.D. (Neutron Science Division, Korea Atomic Energy Research Institute) ;
Jun, B.H. (Neutron Science Division, Korea Atomic Energy Research Institute) ;
Kim, C.J. (Neutron Science Division, Korea Atomic Energy Research Institute)