摘要
本文报导了使用交流磁化率、XRD、NQR、NMR等实验手段通过加速反应研究YBa_2Cu_3Q_7超导相在水中的退化机制问题。研究表明,水对超导相有很强的腐蚀作用,使之分解为CuO、Ba(OH)_2和Y-Ba化合物,Ba(OH)_2又进一步和大气中的CO_2反应生成BaCO_3。DW-3胶涂层和金属管帽封装能有效地保护超导样品防止水或大气中水汽的侵蚀。
The degeneration mechanism of YBa_2Cu_3O_7 in water has been investigated with the method of accelerated reacts using ac susceptibility, XRD, NQR, and NMR. The results show that waters have strong corrosive effect to superconducting sample, YBa_2Cu_3O_7 phase decomposes CuO, Ba(OH)_2 and Y-Ba compound in water, and Ba(OH)_2 further reacts with CO_2 in atmosphere to form BaCO_3.DW-3 viscos coating and metal encapsulant can protect the sample to prevent deterioration from water and atmospheric moisture.
出处
《华东师范大学学报（自然科学版）》
CAS
CSCD
1989年第2期52-56,共5页
Journal of East China Normal University(Natural Science)
基金
上海市科学技术发展基金
关键词
超导体
交流磁化率
退化
保护涂层
superconductor
ac susceptibility
XRD
NQR
NMR
coating
