硅酸盐熔体团粒结构类声子振动的高温拉曼光谱研究

doi:10.3964/j.issn.1000-0593(2010)05-1261-05

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Abstract Silicate melts are special fractal dimension system that is metastable state of near-way order and far-way disorder. In this paper，the size of nanometer aggregation structure and the frequences of phonon vibration like mode in the low dimension silicate series(CaO-Al₂O₃-SiO₂ and Na₂O-Al₂O₃-SiO₂ series) synthesized via high temperature melting and sol gel methods were measured by means of small-angle X-ray scattering (SAXS), low wavenumber Raman spectrum(LWRS) and high temperature Raman spectrum(HTRS in situ measuring). The nanometer self-similarity aggregation structure(it’s size is about a few nm to a few tens nm) and phonic phonon vibration like modes of low temperature silicate gel, high temperature silicate melts and it’s quenching glasses phases were obtained. So a quantitative method by HTRS for measuring the aggregation size in the high temperature melts was established. The results showed that the aggregation size of the silicate melts is smaller at high temperature than at room temperature and the number of bridge oxygen in one Si—O tetrahedron in network structure units is decreasing at high temperature. This study work provides important theory and information for deliberating geochemistry characteristic, crystallization & evolution of natural magma and enhancing performance of low dimension silicate matelials.

Key words：Silicate melts;Nanometer aggregation structure;Phonon vibration like modes;High temperature Raman spectrum

Received: 2009-05-16 Accepted: 2009-08-20

ZTFLH:

O741

Corresponding Authors: XU Pei-cang E-mail: xpc@jstu.edu.cn; xupeicang42@tom.com

Cite this article:

XU Pei-cang,LI Ru-bi,SHANG Tong-ming, et al. A Study of Phonon Vibration Like Modes for Aggregation Structure in Silicate Melts by High Temperature Raman Spectrum [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2010, 30(05): 1261-1265.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2010)05-1261-05 OR https://www.gpxygpfx.com/EN/Y2010/V30/I05/1261

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