| abstract |
The invention provides a method for preparing a superconducting target material, which comprises the following steps: mixing barium carbonate, copper oxide, yttrium oxide and a pore-forming agent, and then performing first pressing to obtain a green body; After mixing with yttrium oxide, a second pressing is performed to obtain a honeycomb green body; the green body or the honeycomb green body is pre-sintered in an oxygen atmosphere and then crushed to obtain a powder; the powder is subjected to a third pressing Forming and sintering to obtain a superconducting target. In the invention, the pre-sintered block is prepared into a honeycomb shape, or a pore-forming agent is added to form a porous structure during pre-sintering to increase the oxygen exchange area, so that the barium carbonate is fully decomposed into barium oxide and carbon dioxide, and converted into Y 1 Ba 2 Cu The 3 O 7 phase effectively reduces the progress of the reversible reaction and increases the proportion of the superconducting phase, and in combination with the subsequent pressing and sintering, the density of the superconducting target is improved. |