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Combustion synthesis of silicon nitride using ultrafine silicon powders

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Powder Metallurgy and Metal Ceramics Aims and scope

The paper examines the synthesis of α-Si3N4 using ultrafine powders of silicon and inert diluent (α-Si3N4). It is established that the combustion temperature of the mixture based on silicon particles 200 nm in diameter is lower than the silicon melting point (1420°C). The low combustion temperature is obviously attributed to a nanofraction in the silicon powder. The specific surface area of silicon nitride increases with decreasing silicon fraction in the starting mixture. When Si with S sp = 6 m2/g and 12 m2/g is used, the maximum specific surface area of Si3N4 is 6.5 m2/g and 9.6 m2/g, respectively. The content of the low-temperature Si3N4 (alpha phase) modification remains the same in the synthesis product: α /(α + β) ⋅ 100% = 89–93% (∼95 wt.%).

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Authors and Affiliations

  1. Institute of Structural Macrokinetics and Materials Science, Russian Academy of Sciences, Chernogolovka, Moscow Region, Russia

    V. V. Zakorzhevskii & I. P. Borovinskaya

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  1. V. V. Zakorzhevskii
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  2. I. P. Borovinskaya
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Correspondence to V. V. Zakorzhevskii.

Additional information

Translated from Poroshkovaya Metallurgiya, Vol. 48, No. 7–8 (468), pp. 7–13, 2009.

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Zakorzhevskii, V.V., Borovinskaya, I.P. Combustion synthesis of silicon nitride using ultrafine silicon powders. Powder Metall Met Ceram 48, 375–380 (2009). https://doi.org/10.1007/s11106-009-9155-2

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  • DOI: https://doi.org/10.1007/s11106-009-9155-2

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