采用XRD、SEM和拉曼光谱研究了溶胶-凝胶法制备的接近钡长石化学计量成分的BaO-Al2O3-SiO2系烧结玻璃形成趋势.结果表明,在本实验条件下,SiO2含量高和BaO/Al2O3比值大,有助于形成玻璃.BaO/SiO2比值大,形成[AlO4]四配位结构的Al2O3含量高.BaO/Al2O3与[AlO4]/Al3+的关系近似线性关系.建立了一个烧结BAS凝胶玻璃形成的判别式,计算了在实验成分范围内,玻璃形成区与析晶区的边界线.根据判别式得到的计算结果与实验结果相符.
The effect of composition on the tendency of forming BAS (barium aluminosilicate) sintered glass with compositions near the theoretical composition of
barium feldspar by sol-gel process was studied by XRD, SEM and Raman spectrum. Results indicated that, in the experimental range, larger SiO2 content and larger
BaO/Al2O3 ratio were advantageous to glass formation. Increasing BaO/Al2O3 ratio causes an increase in the amount of alumina with [AlO4] structure. The
relationship between [AlO4]/Al3+ and BaO/Al2O3 can be expressed as a linear equation. A criterion for glass formation in the studied system was established. The
criteron showed good fitness with the experimental results.
参考文献
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