engleski

Preparation of "Low Cost Sialons" from the Diatomaceous Earth by Carbothermal Method

Diatomaceous earth's (DE) from the deposits in the central part of Slovakia have been used to produce fired insulating bricks. The average content of SiO2 and Al2O3 in the latter products is 65.2 wt.% and 15 wt.%, respectively. Both oxides being combined in the form of various minerals. The aim of the present study is to present the results of testing a diatomaceous earth as a potential raw-material for producing "low cost sialons" by carbothermal nitridation. the tested DE was found to be a suitable precursor for Si3N4 carbothermal synthesis because of low Al2O3 to SiO2 ratio.

low cost sialons; diatomaceous earth; carbothermal reduction

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