Phase composition of the products of combustion of ferrosilicon in nitrogen with fluorine-containing additives present

被引:0
|
作者
L. N. Chukhlomina
O. G. Vitushkina
V. I. Vereshchagin
机构
[1] Tomsk Polytechnical Institute,Tomsk Scientific Center of the Siberian Branch of the Russian Academy of Sciences
来源
Glass and Ceramics | 2008年 / 65卷
关键词
Silicon Nitride; Topaz; SiAlON; Ferrosilicon; Silicon Tetrafluoride;
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学科分类号
摘要
The influence of fluorine-containing additives (ammonium fluoride and topaz concentrate) on the phase composition of the products of combustion of ferrosilicon in nitrogen and the morphology of the silicon nitride particles formed is investigated. It is shown that the introduction of 0.5% topaz concentrate into ferrosilicon transfers the autowave combustion regime characteristic for nitriding of ferrosilicon without additives into a layerwise regime. It is established that the high-temperature â modification of silicon nitride â-Si3N4 forms in the presence of ammonium fluoride and a â-Si3N4-based solid solution of the type SiAlON forms in the presence of the topaz concentrate.
引用
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页码:236 / 239
页数:3
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