Superconductivity in YxYBa2−xCu4O8±δ system

Synthesis and properties of doped HgBa2Ca2Cu3O8+δsuperconductors

“…The sol-gel method for preparing Pb,Fe and Cd doped precursors was used. This method has been also used for preparing nanosize powders of Y-123 ceramic [6]. Fine homogeneous and reactive Hg-free precursor Ba 2 Ca 2 Cu 3 O 8+δ samples were obtained by the sol-gel method using acetic acid as a complex-forming agent and the acetates of Ba, Ca, Cd, Cu, Pb and Fe were used.…”

Preparation and Properties of Doped Hg-Based Superconducting Copper Oxides

“…Using the wet chemistry offers some advantages in comparison with the classical solid state ceramics processing, especially better chemical homogeneity and higher reactivity of the precursor powder. In particular, the solutions of oxalates, nitrates or organic complexes (sol-gel method) [5,6] were used for YBa 2 Cu 3 O 7−δ , HgBa 2 Cu 1 O 4+δ synthesis processing.…”