YBa 2Cu 3O y (YBCO) cuprates with the additives of NaNO 3 and NaCl were synthesized by the standard solid-state reaction technique. For the samples with addition of NaNO 3, the superconducting transition temperature T c0 remains almost unchanged although the lattice constants of the unit cell decrease monotonically with an increase in the additive of NaNO 3. The superconducting transition temperature T c0 for NaCl doping in YBCO, on the other hand, decreases with an increase in the content of NaCl. The lattice constants of a, b, and c increase slightly for NaCl doping in YBCO. We compared these results with that of the KNO 3 added in YBCO and believe that the effects of lattice strain and chlorine replacing for Ba on superconductivity and structure should be considered in these system.