Abstract
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.
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Chądzyński, G.W., Staszczuk, P., Sternik, D. et al. Studies of physico-chemical properties and fractal dimensions of selected high-temperature superconductor surfaces. J Therm Anal Calorim 94, 623–626 (2008). https://doi.org/10.1007/s10973-008-9346-y
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DOI: https://doi.org/10.1007/s10973-008-9346-y