Structural characterisation of silicon carbonitride ceramics derived from polymeric precursors
Structural characterisation of silicon carbonitride ceramics derived from polymeric precursors
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DOI：
10.1016/s0955-2219(99)00142-9
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发表时间：
2000-02
影响因子：
5.7
通讯作者：
S. Trassl;D. Suttor;G. Motz;E. Rössler;G. Ziegler
中科院分区：
文献类型：
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作者：
S. Trassl;D. Suttor;G. Motz;E. Rössler;G. Ziegler
由官能化的氯硅烷制备具有定制结构的聚合物前体。在惰性气氛下的热解导致在1000°C下的无定形Si-C-N-（H）陶瓷。进一步的热处理导致转变成结晶稳定的结晶相组合。通过应用29 Si和13 C固态核磁共振（NMR）光谱表征300和1600°C之间的固体中间体，研究了与交联、热解和结晶相关的结构变化。此外，傅里叶变换红外光谱（FTIR），X射线衍射（XRD），热分析技术和密度测量。这些方法的组合和具有定制结构的聚合物前体的使用指出了聚合物结构与无定形陶瓷材料的结构的相关性。
Polymeric precursors with tailored structures were prepared from functionalised chlorosilanes. Pyrolysis under inert atmospheres led to amorphous Si–C–N–(H) ceramics at 1000°C. Further heat treatment caused the transformation into the thermodynamically stable crystalline phase assemblage. The structural changes associated with crosslinking, pyrolysis and crystallisation were studied by characterising the solid intermediates between 300 and 1600°C applying29Si and13C solid state nuclear magnetic resonance (NMR) spectroscopy. In addition, Fourier transformed infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermoanalytical techniques and density measurements were employed. The combination of these methods and the use of polymeric precursors with tailored structures pointed to a correlation of the polymer architecture with the structure of the amorphous ceramic material.