Salt-assisted combustion synthesis of silicon nitride with high α-phase content

Won, H.I.; Won, C.W.; Nersisyan, Hayk H.; Yoon, Keun Sig

doi:10.1016/j.jallcom.2010.02.157

Cited by 11 publications

(7 citation statements)

References 22 publications

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“…This indicated that NaCl was more efficient at promoting the formation of α-phase SiAlON. This result is consistent with results of a previous work, which reported that α-phase Si 3 N 4 content increased upon addition of NaCl for the combustion synthesis of α/β-Si 3 N 4 [23].…”

Section: Methodssupporting

confidence: 93%

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Niu

Harada²,

Suzuki

et al. 2014

Journal of Alloys and Compounds

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High-quality Y-and Ca-α/β-SiAlON and α-SiAlON ceramics were synthesized via salt-assisted combustion synthesis from Si, Al, and metal oxide (Y 2 O 3 and CaO) with the addition of NaCl and MgCl 2 under a nitrogen pressure of 1 MPa. NaCl and MgCl 2 were employed as they act as excellent diluents that effectively absorb the reaction heat through melting and evaporation. We found that the type of metal chlorides employed significantly affected the α/β ratio and the morphology of the product, with the use of NaCl affording high α/β ratios and equiaxed morphologies, while the use of MgCl 2 resulting in low α/β ratios and elongated grains. The results of this work suggest that high-purity α/β-SiAlON composite products of intended α/β ratios can be successfully fabricated by controlling the initial metal chloride content.

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Section: Methodssupporting

confidence: 93%

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Niu

Harada²,

Suzuki

et al. 2014

Journal of Alloys and Compounds

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“…In fact, in recent decades, several processes have been developed for laboratory-scale synthesis of silicon nitride nanoparticle, such as the direct nitridation of silicon, sol-gel methods, and chemical vapor deposition (CVD; Kavecky et al 2000;Wang et al 2006;Won et al 2010;Yang et al 2011;Li et al 2012). In general, the processes could be divided into three categories: solid-state reaction method, liquid-state reaction method, and gas-state reaction method.…”

Section: Introductionmentioning

confidence: 99%

Modeling for particle size prediction and mechanism of silicon nitride nanoparticle synthesis by chemical vapor deposition

Wen

Wang

2017

Aerosol Science and Technology

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Particle size is a vital characterization for silicon nitride nanoparticle as its scale determines its application area. Particle size prediction for synthesis of silicon nitride nanoparticle by chemical vapor deposition (CVD) is much needed. In this study, a model is proposed for particle growth during silicon nitride nanoparticle synthesis by CVD in order to predict particle size. Comparison between modeling and experimental results validated the model. The modeling results showed that lower pressure in the condensation room would be an effective way of obtaining silicon nitride nanoparticles with smaller particle size. An expression is established to reveal the relation between the mean particle diameter of silicon nitride nanoparticle and pressure in the condensation room based on the modeling. The modeling method is capable of predicting the mean particle size of ultrafine silicon nitride powder to within 3.6% accuracy. Corresponding manufacturing thermal parameters are recommended for silicon nitride nanoparticle production with different mean particle sizes. Modeling and analysis in this article may provide theoretical guidance for production of silicon nitride nanoparticle by CVD. EDITOR Nicole Riemer

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“…5 Research efforts have been focused on the reaction mechanism and thermokinetic model of the Si 3 N 4 powders prepared by CS method. [6][7][8][9][10][11][12][13] Some attempts on controllable preparation of a-Si 3 N 4 has been made by many research groups, [14][15][16][17][18][19][20][21][22][23] including our previous contribution. 24 However, few detailed reports on the immanent crystal growth mechanism of Si 3 N 4 powders with high a-phase content can be found yet.…”

Section: Introductionmentioning

confidence: 99%

Crystal Growth in the Combustion Synthesis of α‐Si₃N₄ Using Si with Different Particle Sizes

Wang

Cui

et al. 2015

J. Am. Ceram. Soc.

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In this present work, Si3N4 powders with high α‐phase contents and distinct crystal morphologies were prepared via a promising approach of combustion synthesis (CS), using Si powders with different particle sizes as reactants. The influence of Si particle size on phase composition and crystal morphologies in the products was systematically investigated. Two unique crystal morphologies, radial‐spheroidal‐cluster and flowerlike, were observed in the Si3N4 products. The crystal growth mechanisms of Si3N4 granules in the CS system with disparate Si have been proposed based on experiments and thermokinetic calculations. As conclusion, the α‐phase content in the final product was synergetically dominated by the vaporization process of Si particles and the α–β phase transformation of Si3N4 during the after‐burn period. Si3N4 powders with high α‐phase content can be obtained from Si powders with an appropriate particle size.

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Salt-assisted combustion synthesis of silicon nitride with high α-phase content

Cited by 11 publications

References 22 publications

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Modeling for particle size prediction and mechanism of silicon nitride nanoparticle synthesis by chemical vapor deposition

Crystal Growth in the Combustion Synthesis of α‐Si₃N₄ Using Si with Different Particle Sizes

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Salt-assisted combustion synthesis of silicon nitride with high α-phase content

Cited by 11 publications

References 22 publications

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Fabrication of mixed α/β-SiAlON powders via salt-assisted combustion synthesis

Modeling for particle size prediction and mechanism of silicon nitride nanoparticle synthesis by chemical vapor deposition

Crystal Growth in the Combustion Synthesis of α‐Si3N4 Using Si with Different Particle Sizes

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Crystal Growth in the Combustion Synthesis of α‐Si₃N₄ Using Si with Different Particle Sizes