Sol-gel Synthesis and Characterization of Kalsilite-type Alumosilicates

Authors

  • Irma BOGDANOVICIENĖ, Audronė JANKEVICIUTĖ, Jiri PINKAS, Aldona BEGANSKIENĖ, Aivaras KAREIVA1∗ Department of General and Inorganic Chemistry, Vilnius University

Keywords:

alumosilikates, kalsilite-type, KAlSiO4, K0.5Na0.5AlSiO4, sol-gel synthesis.

Abstract

In this paper, the sol-gel synthesis and characteristic properties of kalsilite-type alumosilicates (KAlSiO4 and
K0.5Na0.5AlSiO4) are reported. The polycrystalline powders were characterized by thermal analysis (TG/DTA), powder
X-ray diffraction analysis (XRD), IR spectroscopy and scanning electron microscopy (SEM). Single-phase kalsilite
oxides have been obtained after annealing precursor gels for 5 h at 750 °C. It was demonstrated that crystallinity of the
samples slightly depends on the duration of annealing. From the results obtained, it could be concluded that the KAlSiO4
solids are composed of the volumetric plate-like grains grains with no regular size (from 5 μm to 30 μm). Larger
crystallites for mixed potassium-sodium kalsilite have formed (from 10 μm to 80 μm) in comparison with potassium
kalsilite samples.

Downloads

Published

2007-09-13

Issue

Vol. 13 No. 3 (2007)

Section

Articles

License

 

The copyrights for articles in this journal are retained by the author(s), with first publication rights granted to the journal. By virtue of their appearance in this open-access journal, articles are free to use with proper attribution in educational and other non-commercial settings.