Synthesis process of fine powder YBaCuO_7-x superconducting material using sol-gel

摘要

The present invention relates to a method for producing a polyvinyl alcohol (PVA), comprising the steps of: mixing an aqueous solution of nitrate of Y, Ba, Cu with an aqueous solution of polyvinyl alcohol (PVA); A second step of obtaining a transparent blue-colored transparent sol obtained by drying the mixed solution; A third step of drying the sol obtained in the second step to obtain a gel precursor; A fourth step of pretreating the gel precursor obtained in the third step at 500C to obtain a precursor powder; The precursor powder obtained in the fourth step was sintered at 800 to 920C to form YBa₂Cu₃O_7-xTo obtain a crystal powder of YBa₂Cu₃O_7-xAs the superconducting material synthesis process, the YBa₂Cu₃O_7-xThe superconducting material overcomes the brittleness of the ceramic type due to the uniformity and fine grain size of the powder, and the sol and gel obtained during the process of the present invention can be used as a mother liquor for producing thin films and fibers having excellent product characteristics.