利用CO_2激光对YBa_2Cu_3O_(7-Y)块材进行熔凝处理后,证明可逆反应式YBa_2Cu_3O_(7-Y)(?)Y_2Cu_2O_5+4BaCuO_2成立,在结构上消除了孔洞等缺陷,使晶粒细化均匀,有序化程度及致密度提高,有效地提高了材料的临界电流密度J_c,从而提出用CO_2激光制备高温超导体YBa_2Cu_3O_(7-y)超导体块材、带材及线材实用化的新工艺. After the YBa_2Cu_3O_ (7-Y) block was fused by CO_2 laser, it was proved that the reversible reaction YBa_2Cu_3O_ (7-Y) (?) Y_2Cu_2O_5 + 4BaCuO_2 was established and the defects such as voids were eliminated in the structure, Uniform, orderly degree and density increase, effectively raising the critical current density of the material J_c, so as to put forward a new process for the practical manufacture of YBa_2Cu_3O_ (7-y) superconductor bulk materials, ribbons and wires by CO_2 laser.