| 摘要 |
PURPOSE:To improve the superconductivity by heating a hollow oxide superconducting powder having hollow pores in the section of the atmosphere contg. O2 or O3 to melt the surface layer and to enclose the O2 or O3 in the pores. CONSTITUTION:Specified amts. of the compds. respectively contg. the elements constituting an oxide superconductor are dissolved in a solvent, the obtained soln. 1 is supplied to a two-fluid nozzle-type atomizer 2 and atomized, the atomized material 3 is entrained by the carrier gas introduced from a mass flow controller 4 (MFC) and transferred to a virtual impactor 5, an inert gas is introduced from a taper-tube flowmeter 6 to classify the atomized material 3 having 0.5-0.8mum particle diameter, the mixture is supplied to a reaction furnace 7 contg. the O2 or O3 atmosphere kept at >=600 deg.C, heated and subjected to a reaction, and a hollow oxide superconducting powder 8 is obtained. The powder 8 and the O2 and O3 introduced from an MFC 24 are supplied to a melting and synthesizing furnace 9 to melt the surface layer of the power 8 and to enclose O2 or O3 in the hollow pores, and the product is collected by a charged collector 11 and dried. |
