Studies of physico-chemical properties and fractal dimensions of selected high-temperature superconductor surfaces

被引：5
|
作者：
Chadzynski, G. W. [1 ]
Staszczuk, P. [2 ]
Sternik, D. [2 ]
Blachnio, M. [2 ]
机构：
[1] Wroclaw Univ Technol, Inst Phys, Fac Fundamental Problems Technol, PL-50370 Wroclaw, Poland
[2] Marie Curie Sklodowska Univ, Fac Chem, Dept Physicochem Solids Surface, PL-20031 Lublin, Poland
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2008年 / 94卷 / 03期
关键词：
adsorption-desorption isotherms; atomic force microscopy; fractal dimensions; high-temperature superconductors; surface roughness parameters;
D O I：
10.1007/s10973-008-9346-y
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Properties relating to porosity of solids (fractal dimensions, surface roughness parameters) were evaluated from atomic force microscopy (AFM) and nitrogen adsorption-desorption isotherms measured at 77 K for selected high-temperature [(RE) Ba2Cu3O7-x, RE=Y, Sm] superconductors. Adsorption capacity, specific surface area, fractal dimensions were determined from adsorption-desorption isotherms. The adsorption isotherms of all samples were S-shaped and belong to type II according to the IUPAC classification. A linear relationship was demonstrated between the fractal coefficients calculated by using the two methods and values of adsorption capacity of monolayer.
引用
收藏
页码：623 / 626
页数：4
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