Sol-gel preparation of low oxygen content, high surface area silicon nitride and imidonitride materials.
Sol-gel preparation of low oxygen content, high surface area silicon nitride and imidonitride materials.
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DOI：
10.1039/c5dt04961j
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发表时间：
2016-03
影响因子：
4
通讯作者：
K. Sardar;R. Bounds;M. Carravetta;G. Cutts;J. Hargreaves;A. Hector;J. Hriljac;W. Levason;Felix Wilso
中科院分区：
文献类型：
--
作者：
K. Sardar;R. Bounds;M. Carravetta;G. Cutts;J. Hargreaves;A. Hector;J. Hriljac;W. Levason;Felix Wilso
Si(NHMe)4与氨的反应能被小浓度的三氟化铵有效地催化，并可用于制备独立的硅酰亚胺凝胶。在不同温度下焙烧可得到具有高比表面积和低氧含量的无定形或部分结晶的亚胺氮化硅/氮化硅样品。晶相完全为α-Si3N4，观察到非晶态材料和晶化材料的结构相似。
Reactions of Si(NHMe)4 with ammonia are effectively catalysed by small ammonium triflate concentrations, and can be used to produce free-standing silicon imide gels. Firing at various temperatures produces amorphous or partially crystallised silicon imidonitride/nitride samples with high surface areas and low oxygen contents. The crystalline phase is entirely α-Si3N4 and structural similarities are observed between the amorphous and crystallised materials.