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Large‐Scale Synthesis of Magnenium Silicon Nitride Powders at Low Temperature
Author(s) -
Peng Li,
Liqiang Xu,
Zhicheng Ju,
Zhang Jie,
Yang Jia,
Qian Yitai
Publication year - 2008
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2007.02141.x
Subject(s) - orthorhombic crystal system , silicon nitride , transmission electron microscopy , autoclave , scanning electron microscope , materials science , analytical chemistry (journal) , silicon , nitride , yield (engineering) , powder diffraction , atmospheric temperature range , nitrogen , crystallography , chemical engineering , chemistry , nanotechnology , metallurgy , composite material , crystal structure , organic chemistry , layer (electronics) , meteorology , engineering , physics
Magnesium silicon nitride (MgSiN 2 ) powders have been synthesized by the reaction of SiCl 4 , N 2 H 4 ·HCl, and Mg in an autoclave at 450°C for 5 h. The yield of the products is calculated to be about 90% according to the amount of SiCl 4 . X‐ray powder diffraction patterns indicated that the products are orthorhombic MgSiN 2 (cell parameters: a =5.252 Å, b =6.426 Å, and c =4.979 Å) together with little amount of Si. The results of scanning electron microscopy and transmission electron microscopy (TEM) observations indicate that the particles have rough surfaces and have diameters in the range of 0.5–3 μm. The high‐resolution TEM image shows clearly resolved fringes separated by 0.248 nm, which corresponds to the (002) d ‐spacing of the orthorhombic MgSiN 2 . The effects of different synthesis conditions on the final formation of MgSiN 2 powder, such as the different ratios of the precursors, reaction temperature, and nitrogen sources were also investigated.