Synthesis of phase-pure orthorhombic YB2Cu3Ox under low oxygen pressure

Combinatorial synthesis and characterization of alkali metal doped oxides for diesel soot combustion

“…Thus, it is possible that the trace impurity cannot be detected by XRD, but still yields an effect during thermal analysis. This is not unlike the case in processing of the high temperature superconductor YBa 2 Cu 3 O 7 , where the presence of the trace phase BaCuO 2 is not seen in powder XRD, but is readily apparent by differential thermal analysis [28].…”

High-temperature superconductors for electric power and high-energy physics

“…Furthermore, the decomposition temperature of BaCO 3 is also reduced significantly in low oxygen pressure. Based on these principles, a low-pressure calcination technique was developed at Argonne National Laboratory [55][56][57][58] and is routinely used by Superconductive Components to produce phase-pure YBa 2 Cu 3 O x powder ( Figure 3). In a typical low-pressure calcination process, the required oxides and carbonates are mixed and ball milled in a proper molar ratio.…”

“…This relatively small particle size is due to low processing temperatures because of faster cation diffusional kinetics in YBa 2 Cu 3 O x under reduced oxygen pressure. [55][56][57][58]62 As mentioned, a number of advanced techniques have been utilized to synthesize YBa 2 Cu 3 O x powders. Most of these techniques rely on liquid-solution mixing, thereby achieving mixing at a molecular level.…”

Compressive creep of YBa2Cu3Ox

“…15 Deformation can alter defect structures and, consequently, superconducting properties. 6 ' 7 Studies of deformation also yield information on diffusional processes.…”