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arXiv 1710.06271cond-mat.mtrl-sci
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DyBa2Cu3O6 +δ超导体化学稳定性的XPS研究

XPS study of the chemical stability of DyBa2Cu3O6+δ superconductor

A. V. Fetisov, G. A. Kozhina, S. Kh. Estemirova, V. B. Fetisov, R. I. Gulyaeva

摘要:

用X射线衍射(XRD)、X射线光电子能谱学(XPS)和热分析等方法研究了DyBa_2Cu_3O_(6 +δ)粉末的化学稳定性。粉末在球磨机活化器中进行机械加工以加速化学降解。测定了DyBa_2Cu_3O_(6 +δ)在空气湿度影响下的水解动力学曲线。DyBa_2Cu_3O_(6 +δ)的阻水性能较好,但与在潮湿环境中不稳定的YBa_2Cu_3O_(6 +δ)的类似性能差别不大。材料的化学降解由固体反应物的自由表面附近的水颗粒的关键浓缩(由于它们在本体中的低扩散性)引发,导致相应区域的快速化学分解。

英文摘要:

The chemical stability of the powder DyBa2Cu3O6+δ has been studied by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and thermal analysis at ambient conditions. The powder was subjected to mechanical processing in a ball mill-activator to accelerate chemical degradation. The kinetic regularities of hydrolytic decomposition of DyBa2Cu3O6+δ under the influence of air moisture have been determined. The resistive properties of DyBa2Cu3O6+δ to water have been found to be better, but not much different from analogous properties of YBa2Cu3O6+δ which is unstable in a wet environment. Chemical degradation of the material is triggered by crucial concentrating of water particles near the free surface of the solid reactant (due to their low diffusibility in the bulk) leading to rapid chemical decomposition of the respective regions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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