Characterization and thermal dehydration kinetics of admontite mineral hydrothermally synthesized from magnesium oxide and boric acid precursor

Characterization and thermal dehydration kinetics of admontite mineral hydrothermally synthesized... Magnesium borates are one of the major groups of boron minerals that have high heat and corrosion resistance and high coefficients of elasticity. In this study, magnesium borate minerals are hydrothermally synthesised using boric acid and magnesium oxide and are characterised by various analysis techniques. A drying temperature of 40 °C was used. From the results obtained, admontite mineral is synthesised purely at a reaction temperature of 100 °C and reaction times of both 120 and 240 min. Characterisations of the products are determined with the techniques of X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, differential thermal analysis and thermal gravimetry analysis. Additionally, overall admontite yields were calculated and varied between 89.98 ± 3.05 and 89.07 ± 1.28 %. Moreover, a kinetic study using the Ozawa, Kissenger, and Doyle methods was performed in the stage of decomposition of admontite that had been synthesised at a reaction time of 240 min. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Characterization and thermal dehydration kinetics of admontite mineral hydrothermally synthesized from magnesium oxide and boric acid precursor

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Publisher
Springer Journals
Copyright
Copyright © 2013 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-013-1237-6
Publisher site
See Article on Publisher Site

Abstract

Magnesium borates are one of the major groups of boron minerals that have high heat and corrosion resistance and high coefficients of elasticity. In this study, magnesium borate minerals are hydrothermally synthesised using boric acid and magnesium oxide and are characterised by various analysis techniques. A drying temperature of 40 °C was used. From the results obtained, admontite mineral is synthesised purely at a reaction temperature of 100 °C and reaction times of both 120 and 240 min. Characterisations of the products are determined with the techniques of X-ray diffraction, Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electron microscopy, differential thermal analysis and thermal gravimetry analysis. Additionally, overall admontite yields were calculated and varied between 89.98 ± 3.05 and 89.07 ± 1.28 %. Moreover, a kinetic study using the Ozawa, Kissenger, and Doyle methods was performed in the stage of decomposition of admontite that had been synthesised at a reaction time of 240 min.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: May 8, 2013

References

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