Spectroscopy and Spectral Analysis, Volume. 34, Issue 7, 1869(2014)
Effect of Temperature on the Structure of CaO-MgO-Al2O3-SiO2 Nanocrystalline Glass-Ceramics Studied by Raman Spectroscopy
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.
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LI Bao-wei, OUYANG Shun-li, ZHANG Xue-feng, JIA Xiao-lin, DENG Lei-bo, LIU Fang. Effect of Temperature on the Structure of CaO-MgO-Al2O3-SiO2 Nanocrystalline Glass-Ceramics Studied by Raman Spectroscopy[J]. Spectroscopy and Spectral Analysis, 2014, 34(7): 1869
Received: Sep. 1, 2013
Accepted: --
Published Online: Jul. 22, 2014
The Author Email: Bao-wei LI (Lbaowei@163.com)