%0 Journal Article
%T Structural and Morphological Transformations of the (NH<sub>4</sub>, Na)-exchanged Zeolites 4A, 13X and Synthetic Mordenite by Thermal Treatment
%A Kosanovi£¿
%A Cleo
%A Risti£¿
%A Alenka
%A Suboti£¿
%A Boris
%J -
%D 2002
%X Sa£¿etak Thermal treatment of (NH4, Na)-exchanged zeolites 4A and 13X results in the formation of an amorphous phase (T < 1000 ¡ãC) and a crystalline phase of mullite at temperatures above 1000 ¡ãC. No structural changes have been noticed for the (NH4, Na)-exchanged synthetic mordenite treated under the same conditions. Scanning electron microscopy (SEM), X-ray powder diffraction, Fourier transform infrared (FT-IR) spectroscopy and particle size analysis were used to characterize the initial materials and the obtained products
%K ion exchanged zeolites
%K thermal transformations
%K pseudomorphic transformation
%K mullite
%U https://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=191045