Preparation and infrared study of magnesium borate gels with a wide composition range (Journal article)

Karakassides, M. A./ Petridis, D./ Mousdis, G./ Trapalis, C./ Kordas, G.

Gels in the system xMgO.(1-x)B2O3 (0.42 less than or equal to x less than or equal to 0.80) have been prepared by hydrolytic polycondensation of boron-butoxide with magnesium methoxide in alcoholic medium. The gels were heated at 400 degrees C in order to obtain organic-free amorphous materials. The infrared spectra of these gels reveal the progressive modification of the borate network with increasing magnesium percentage. The X-ray diffraction patterns of the gels show that calcination at temperatures higher than 400 degrees C leads to crystallization of the amorphous network. For the very high magnesium content glass (x = 0.80), evidence for magnesium carbonate formation is detected.
Institution and School/Department of submitter: Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Μηχανικών Επιστήμης Υλικών
Keywords: glasses
ISSN: 0022-3093
Link: <Go to ISI>://A1996VE40600025
Publisher: Elsevier
Appears in Collections:Άρθρα σε επιστημονικά περιοδικά ( Ανοικτά)

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