Journal article

Nitridation of silica to an α-silicon nitride nanorod using NaNH 2 in the autoclave at 700°C

L Zhu, L Chen, T Huang, Y Qian, Y Gu

Journal of the American Ceramic Society | Published : 2007

Abstract

α-silicon nitride nanorods have been synthesized through solid-state reduction-nitridation of silica using NaNH as both a reductant and a nitriding reagent. X-ray powder diffraction patterns show that the products have a hexagonal phase with lattice parameters a = 7.767 Å and c = 5.630 Å. Transmission electron microscopy reveals that the as-synthesized products are pure nanorods with an average size about 30 nm in diameter and 400 nm in length. X-ray photoelectron spectra indicate that the molar ratio of Si/N is 2.988:4. Fourier-transform infrared spectrum yields a strong Si-N absorption at 926 cm that may be a red shift due to size effect. © 2007 The American Ceramic Society. 2 -1

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