Effect of MgAl2O4 on the growth of ß-Si3Al3O3N5 prepared by carbothermal reduction by nitriding.

Autor: Valdes, Alfredo Flores
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Jazyk: angličtina
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Druh dokumentu: Non-fiction
ISSN: 0862-5468
Abstrakt: Abstract: The β-Si3Al3O3N5 compound was experimentally prepared by carbothermal reduction by nitriding using pure SiO2, Al2O3, C, and N2. The effect of MgAl2O4 on the growth of β-Si3Al3O3N5 was investigated as a function of temperature and molar concentration of MgAl2O4. In this way, it was found that the formation of β-Si3Al3O3N5 when MgAl2O4 is present in concentrations lower than 13 wt. % occurs. However, when the MgAl2O4 concentration was as high as 25.6 wt. %, the formation of β-Si3Al3O3N5 compound was not attained and the formation of quaternary magnesium-rich SiAlON phases such as Mg-Si3Al3O3N5 was found. Moreover, the mechanistic steps during the consolidation of SiAlON type structures are presented and discussed.
Databáze: Katalog Knihovny AV ČR
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