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Method for negative pressure preparation of REBCO (rare earth barium copper oxide) high-temperature bulk superconductor
The invention relates to the technical field of high-temperature superconducting material, in particular to a method for negative pressure preparation of an REBCO (rare earth barium copper oxide) high-temperature bulk superconductor. The method for the negative pressure preparation of the REBCO high-temperature bulk superconductor comprises the following steps of: Step I, preparing powder of an RE123 phase, Step II, preparing a precursor, Step III, preparing the REBCO high-temperature bulk superconductor via high-temperature firing. Step I comprises the steps of preparing precursor powder of the RE123 phase, intensively mixing and grinding the precursor powder of the RE123 phase, putting the powder in an argon atmosphere growth furnace for sintering, and repeating the mixing, grinding and sintering process for twice to form the powder of the RE123 phase. In Step III, the REBCO high-temperature bulk superconductor is prepared via the firing in a negative pressure environment. The method can eliminate influence of BaCO3 on properties of the REBCO high-temperature bulk superconductor in a REBCO high-temperature bulk superconductor preparation process by a normal pressure method, and reduces a temperature difference in a sintering furnace chamber, ventilatory capacity, reaction temperature and energy consumption.
Method for negative pressure preparation of REBCO (rare earth barium copper oxide) high-temperature bulk superconductor
The invention relates to the technical field of high-temperature superconducting material, in particular to a method for negative pressure preparation of an REBCO (rare earth barium copper oxide) high-temperature bulk superconductor. The method for the negative pressure preparation of the REBCO high-temperature bulk superconductor comprises the following steps of: Step I, preparing powder of an RE123 phase, Step II, preparing a precursor, Step III, preparing the REBCO high-temperature bulk superconductor via high-temperature firing. Step I comprises the steps of preparing precursor powder of the RE123 phase, intensively mixing and grinding the precursor powder of the RE123 phase, putting the powder in an argon atmosphere growth furnace for sintering, and repeating the mixing, grinding and sintering process for twice to form the powder of the RE123 phase. In Step III, the REBCO high-temperature bulk superconductor is prepared via the firing in a negative pressure environment. The method can eliminate influence of BaCO3 on properties of the REBCO high-temperature bulk superconductor in a REBCO high-temperature bulk superconductor preparation process by a normal pressure method, and reduces a temperature difference in a sintering furnace chamber, ventilatory capacity, reaction temperature and energy consumption.
Method for negative pressure preparation of REBCO (rare earth barium copper oxide) high-temperature bulk superconductor
LIU YAN (Autor:in) / CHANG JUNBO (Autor:in) / HU ZHIXIANG (Autor:in) / ZHANG LINGLING (Autor:in) / DONG CHUANBO (Autor:in)
30.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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