Preparation of pure nano-grained Si2N2O ceramic
Source abstract
Abstract
Abstract Pure Si 2 N 2 O ceramic is fabricated by nitridizing a powder mixture of Si and SiO 2 . Results show that the prepared Si 2 N 2 O is composed of nano-particles with a size of about 50 nm. Analysis and discussion are focused on the formation mechanism of the nano-grained Si 2 N 2 O ceramic based on thermodynamics calculation, micro-morphologies and phase composition analysis. Preferential formation of Si 3 N 4 on the surface of nano-SiO 2 particles at below melting point of Si and then successive in-situ transformation of SiO 2 and Si 3 N 4 into Si 2 N 2 O at above melting point of Si are considered as the key reasons to form the pure nano-grained Si 2 N 2 O ceramic.
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References (18)
Show source-provided references
1. Thermodynamic calculation of the Si–N–O system
2. Thermodynamics of the Si–O–N system: I, high-temperaure study of the vaporization behavior of silicon nitride by mass spectrometry10.1111/j.1151-2916.1996.tb08596.x ↗
3. Development of the microstructure of the silicon nitride based ceramics10.1590/S1516-14391999000300009 ↗
4. Effect of sintering additives on the nitridation behavior of reaction-bonded silicon nitride10.1016/j.msea.2003.07.005 ↗
5. High-temperature flexural strength of hot-pressed silicon oxynitride ceramics10.1007/BF01730734 ↗
6. Processing, mechanical properties, and oxidation behavior of silicon oxynitride ceramics10.1111/j.1151-2916.1991.tb07305.x ↗
7. Formation of silicon oxinitride from Si3N4 and SiO2 in the presence of Al2O310.1016/0272-8842(84)90017-8 ↗
8. Low-temperature synthesis/densification and properties of Si2N2O with Li2O additive10.1016/j.jeurceramsoc.2007.04.004 ↗
9. Nitrides and oxynitrides: preparation, crystal chemistry and properties10.1016/0955-2219(91)90096-I ↗
10. On the validity of the Hall–Petch relationship in nanocrystalline materials10.1016/0036-9748(89)90342-6 ↗
11. Phase transition and dielectric characteristics of nano-grained BaTiO3 ceramics synthesized from surface-coated nano-powders10.1016/S0169-4332(01)00926-6 ↗
12. Reaction sintering and properties of silicon oxynitride densified by hot isostatic pressing10.1111/j.1151-2916.1992.tb05442.x ↗
13. Mechanical and dielectric properties of porous Si3N4–SiO2 composite ceramics10.1016/j.msea.2008.09.066 ↗
14. Crystallization and amorphization of cristobalite
15. 1991
16. Nitridation behaviour of silicon with clay and oxide additions: rate and phase development10.1016/S0955-2219(97)00023-X ↗
17. Fabrication and microstructure characterization of continuously porous Si2N2O–Si3N4 ceramics10.1016/j.matlet.2006.08.043 ↗
18. Si3N4 and Si2N2O for high performance radomes10.1016/0025-5416(85)90236-8 ↗