TY - JOUR
T1 - Reinforcing increase of ∆tc in mgb2 smart meta-superconductors by adjusting the concentration of inhomogeneous phases
AU - Li, Yongbo
AU - Han, Guangyu
AU - Zou, Hongyan
AU - Tang, Li
AU - Chen, Honggang
AU - Zhao, Xiaopeng
N1 - Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - Incorporating with inhomogeneous phases with high electroluminescence (EL) intensity to prepare smart meta-superconductors (SMSCs) is an effective method for increasing the super-conducting transition temperature (Tc ) and has been confirmed in both MgB2 and Bi(Pb)SrCaCuO systems. However, the increase of ∆Tc (∆Tc = Tc-Tcpure ) has been quite small because of the low optimal concentrations of inhomogeneous phases. In this work, three kinds of MgB2 raw materials, namely,aMgB2,bMgB2, andcMgB2, were prepared with particle sizes decreasing in order. Inhomo-geneous phases, Y2O3:Eu3+ and Y2O3:Eu3+/Ag, were also prepared and doped into MgB2 to study the influence of doping concentration on the ∆Tc of MgB2 with different particle sizes. Results show that reducing the MgB2 particle size increases the optimal doping concentration of inhomogeneous phases, thereby increasing ∆Tc . The optimal doping concentrations foraMgB2,bMgB2, andcMgB2 are 0.5%, 0.8%, and 1.2%, respectively. The corresponding ∆Tc values are 0.4, 0.9, and 1.2 K, respectively. This work open a new approach to reinforcing increase of ∆Tc in MgB2 SMSCs.
AB - Incorporating with inhomogeneous phases with high electroluminescence (EL) intensity to prepare smart meta-superconductors (SMSCs) is an effective method for increasing the super-conducting transition temperature (Tc ) and has been confirmed in both MgB2 and Bi(Pb)SrCaCuO systems. However, the increase of ∆Tc (∆Tc = Tc-Tcpure ) has been quite small because of the low optimal concentrations of inhomogeneous phases. In this work, three kinds of MgB2 raw materials, namely,aMgB2,bMgB2, andcMgB2, were prepared with particle sizes decreasing in order. Inhomo-geneous phases, Y2O3:Eu3+ and Y2O3:Eu3+/Ag, were also prepared and doped into MgB2 to study the influence of doping concentration on the ∆Tc of MgB2 with different particle sizes. Results show that reducing the MgB2 particle size increases the optimal doping concentration of inhomogeneous phases, thereby increasing ∆Tc . The optimal doping concentrations foraMgB2,bMgB2, andcMgB2 are 0.5%, 0.8%, and 1.2%, respectively. The corresponding ∆Tc values are 0.4, 0.9, and 1.2 K, respectively. This work open a new approach to reinforcing increase of ∆Tc in MgB2 SMSCs.
KW - EL inhomogeneous phase
KW - Inject energy
KW - MgB
KW - SMSCs
KW - ∆T
UR - http://www.scopus.com/inward/record.url?scp=85108215181&partnerID=8YFLogxK
U2 - 10.3390/ma14113066
DO - 10.3390/ma14113066
M3 - 文章
AN - SCOPUS:85108215181
SN - 1996-1944
VL - 14
JO - Materials
JF - Materials
IS - 11
M1 - 3066
ER -