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- Title
The Effect of Doping with the Polymer Metallic Complex Poly Zinc Acrylate on Superconducting Bulk MgB.
- Authors
Zhang, Zili; Suo, Hongli; Ma, Lin; Liu, Min; Zhang, Teng; Zhou, Meiling
- Abstract
In this work, the effect of doping with 5% to 20% poly zinc acrylate (PZA) complexes on MgB phase formation was studied. The changes of the lattice parameter and the amount of substituted carbon in the microstructure as well as the critical temperature and the critical current density ( J) of bulk MgB have been studied systematically. Both differential thermal analysis-thermogravimetric (DTA-TG) analysis and infrared (IR) spectrometry results show that the PZA was decomposed between 400°C and 600°C, and the main decomposition products were carbonized polymers and ZnO. The lattice parameter a in all PZA-doped MgB samples was decreased by different degrees, which indicates gradual substitution of carbon on the boron sites in the MgB crystal structure. Compared with the undoped sample, the J values of all the doped samples were enhanced by about an order of magnitude under high magnetic fields. The J value of the MgB sample with 20% PZA doping sintered at 800°C for 1 h reached 8 kA/cm at 5 K and 8 T. Transmission electron microscopy (TEM) images revealed a considerable amount of second-phase particles of ~5 nm size, and a high density of dislocations was observed in the MgB grains.
- Subjects
METAL complexes; ZINC oxide; POLYACRYLATES; CRITICAL currents; METAL microstructure; THERMOGRAVIMETRY; MOLECULAR structure; MAGNETIC properties of metals
- Publication
Journal of Electronic Materials, 2011, Vol 40, Issue 6, p1369
- ISSN
0361-5235
- Publication type
Article
- DOI
10.1007/s11664-011-1535-y