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- W2885227400 abstract "Abstract MgB2 bulks with a density of 1.95 g/cm3, were prepared by an improved Mg-diffusion method. The effects of different heat treatments on superconducting transitions temperature Tc and critical current density Jc of MgB2 were investigated. The MgB2 synthesized by the optimal heat treatment has the Tc of 38.1 K and Jc of 0.53 MA/cm2 at 10 K, self-field. In order to improve poor high field properties in a diffusion method, nano-Pr6O11 and C doping effects on Jc and the irreversible field, Hirr of MgB2 were also studied. The results show that at 10 K and 6 T the Jc for 15 at% C-doped MgB2 reaches 104 A/cm2, which is almost two orders of magnitude higher than that of the undoped one, and better than that of the nano-C doped MgB2 prepared by solid-state reaction. For the nano-Pr6O11-doped MgB2, the Jc also increases by a factor of 9.4 than that of the pure sample at 10 K and 2 T. According to a lot of experimental results and theoretic analyses, we propose that the combination of the improved Mg-diffusion method and chemical doping of nanoparticles or C, may be an efficient approach to make the MgB2 have excellent Jc and Hirr capability in whole magnetic field." @default.
- W2885227400 created "2018-08-22" @default.
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- W2885227400 date "2018-05-01" @default.
- W2885227400 modified "2023-09-28" @default.
- W2885227400 title "Synthesis of High Critical Current Density MgB 2 Bulks by an Improved Mg-diffusion Method" @default.
- W2885227400 doi "https://doi.org/10.1016/s1875-5372(18)30142-5" @default.
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