采用熔融法制备了CaO-MgO-Al2O3-SiO2系纳米晶玻璃陶瓷材料。 在－190～310 ℃温度范围, 利用显微共聚焦拉曼光谱测量分析了该体系纳米晶玻璃陶瓷硅氧四面体结构的变化规律。 结果表明, 随着温度的降低具有不同非桥氧键的硅氧四面体结构单元变化并不一致, 位于三维硅氧四面体结构边缘的具有二个非桥氧键的硅氧四面体(Q2)和具有三个非桥氧键的硅氧四面体(Q1), 以及完全独立于三维硅氧网络结构外的具有四个非桥氧键的硅氧四面体(Q0)受温度影响明显, 其拉曼光谱均向高波数移动, 键的力常数变强, 硅氧键长变短。 为丰富外环境对纳米晶玻璃陶瓷材料结构与性能影响的研究提供了实验依据, 也为控制该体系纳米晶玻璃陶瓷材料的膨胀系数提供了一定的实验依据。

In the present paper, nanocrystalline glass-ceramic of CaO-MgO-Al2O3-SiO2 system was produced by melting method. The CaO-MgO-Al2O3-SiO2 nanocrystalline glass-ceramic was measured by Raman spectroscopy in the temperature range from -190 to 310 ℃ in order to study the effect of temperature on the structure of this system nanocrystalline glass-ceramics. The results showed that different non-bridge oxygen bond silicon-oxygen tetrahedron structural unit changes are not consistent with rising temperature. Further analyses indicated that: the SiO4 tetrahedron with 2 non-bridged oxygen (Q2), the SiO4 tetrahedron with 3 non-bridged oxygen (Q1), which are situated at the edge of the 3-D SiO4 tetrahedrons network, and the SiO4 tetrahedron with 4 non-bridged oxygen (Q0), which is situated outside the 3-D network all suffered a significant influence by the temperature change, which has been expressed as: shifts towards the high wave-number, increased bond force constants, and shortened bond lengths. This paper studied the influence of temperature on CMAS system nanocrystalline glass-ceramics using variable temperature Raman technology. It provides experiment basis to the research on external environment influence on CMAS system nanocrystalline glass-ceramics materials in terms of structure and performance. In addition, the research provides experimental basis for controlling the expansion coefficient of nanocrystalline glass-ceramic of CaO-MgO-Al2O3-SiO2 system.