208 results about "Yttrium barium copper oxide" patented technology

Yttrium barium copper oxide (YBCO) is a family of crystalline chemical compounds, famous for displaying high-temperature superconductivity. It includes the first material ever discovered to become superconducting above the boiling point of liquid nitrogen (77 K) at about 92 K. Many YBCO compounds have the general formula YBa₂Cu₃O₇₋ₓ (also known as Y123), although materials with other Y:Ba:Cu ratios exist, such as YBa₂Cu₄Oy (Y124) or Y₂Ba₄Cu₇Oy (Y247). They are GL-superconductors (their superconduction is explainable with the Ginzburg–Landau theory).