Enhancement of critical current density for nano (n)-ZnO doped MgB2 superconductor

Facile Controlling of the Physical Properties of Zinc Oxide and Its Application to Enhanced Photocatalysis

“…Zinc oxide (ZnO) has been of great interest because of its excellent physical properties, such as low cost, nontoxicity, high thermal stability, photosensitivity, advanced optical properties, and environmentally friendly features [5,6]. erefore, ZnO has been widely used in many fields, such as adsorption, paint, cosmetic, superconductor, and catalyst [7][8][9][10][11][12]. As an effective photocatalyst in the degradation of persistent organic compounds [13][14][15] and catalyst support [16,17], ZnO should have a sufficient structure area and morphology to allow the diffusion of active species and electron transfer [18].…”

Improvement of critical current density J c in powder-in-tube rapid heating, quenching and transformation Nb3Al wires by doping with nano-SnO2

“…In this method, an appropriate amount of nano-size SnO 2 (n-SnO 2 ) was added to the starting materials to form nano-oxide particles in Nb 3 Sn by a selective internal oxidation process; this can prevent grain coarsening during heating treatment. In MgB 2 superconductors, by doping with nano-size ZnO, MgO or SiC particles (n-ZnO [26], n-MgO [27], n-SiC [28][29][30], respectively), the J c performance can also be significantly improved by generation of nano-size defects in the grains of the formed superconducting phase that can act as flux pinning centers. In particular, in n-SiC doped MgB 2 superconductor, the reaction of SiC with Mg and B elements increased the lattice disorder and normal resistivity and thus improved the B c2 of the MgB 2 superconducting phase, leading to a ten-fold increase in J c at 4.2 K and 12 T [31].…”