Synthesis of a Superconductor - YouTube

T1 - High pressure synthesis of Hg1223 superconductor under highly oxidizing atmosphere

Synthesis of a Superconductor - Duration: 3:36

N2 - We report a novel cost-effective and simple method to produce superconductor YBa2Cu3O7-δ (YBCO) powder by a self-sustaining one step process, named Carbon Combustion Synthesis of Oxides (CCSO). In this process the exothermic oxidation of carbon nanoparticles generates a thermal reaction wave that propagates at a velocity of about 1 mm/s through the solid reactant Y2O3, BaO2, CuO mixture, converting it rapidly (order of seconds) to YBCO. The carbon is not incorporated in the product and is emitted as CO2 from the sample generating a highly porous (∼70%) and friable product. Most of the grains have a plate-like shape, are well connected and have a size distribution ranging from 1 to 3 μm. Carbon analysis indicated that the concentration of the residual carbon was less than 0.06 wt %. The magnetization of as-synthesized samples, determined by SQUID magnetometer showed an onset of superconducting (SC) transition at ∼91 K, with a 44% shielding fraction of the -1/(4π) value.

Synthesis and characterization of superconductor …

AB - We report a novel cost-effective and simple method to produce superconductor YBa2Cu3O7-δ (YBCO) powder by a self-sustaining one step process, named Carbon Combustion Synthesis of Oxides (CCSO). In this process the exothermic oxidation of carbon nanoparticles generates a thermal reaction wave that propagates at a velocity of about 1 mm/s through the solid reactant Y2O3, BaO2, CuO mixture, converting it rapidly (order of seconds) to YBCO. The carbon is not incorporated in the product and is emitted as CO2 from the sample generating a highly porous (∼70%) and friable product. Most of the grains have a plate-like shape, are well connected and have a size distribution ranging from 1 to 3 μm. Carbon analysis indicated that the concentration of the residual carbon was less than 0.06 wt %. The magnetization of as-synthesized samples, determined by SQUID magnetometer showed an onset of superconducting (SC) transition at ∼91 K, with a 44% shielding fraction of the -1/(4π) value.

YBa2Cu3O7 (YBCO) is an especially useful second-generation high-temperature superconductor because it becomes superconducting at temperatures above that of liquid nitrogen. Unfortunately, YBCO synthesis is often complex, expensive, and difficult to execute on industrial scales. Now, this practical, scalable, and low-cost technique can produce large YBCO tapes and wires for use in high-field magnets or to carry electrical current.


123 superconductor synthesis essay ..

We report essential details ofthis synthesis technique and present the established superconductingphase diagram of Tc vs x, along with a diagram of theshielding fraction vs x.