YBa＿2Cu＿3O＿（7－δ）高温超导薄膜的保护层研究

On the Protective Coating of YBa_2Cu_3O_(7-δ) High-Temperature Superconducting Film

论述了钇钡铜氧高温超导薄膜在大气中的不稳定性，对比二氧化硅，阐明了氮化硅薄膜作为保护层的优点，并报导了做潮湿实验前后的对比实验结果．最后讨论了氮化硅作为高温超导薄膜保护层的可行性．

The instability of YBCO high T_c superconductive(HTS)film exposed to air is de-scribed. Compared with SiO_2,the advantages of Si_3N_4as protective coating are considered. Al-so given are the T_c results measured before and after humidity experiments for films with orwithout coatings. Finally,the feasibility of Si_3N_4 layer used as protective coating of HTS filmis discussed.