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赤泥黑色玻璃晶化过程的红外光谱研究 被引量:7

Infrared Spectra of Crystallization of Glasses Using Red Mud as Raw Materials
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摘要 本文利用红外吸收光谱(IR)和X射线衍射(XRD)对赤泥黑色玻璃及其晶化过程的结构进行了研究.结果表明:赤泥黑色玻璃晶化析出主晶相为钙铁透辉石,次晶相为钙黄长石.玻璃网络中主要有 SiO_4、 AlO_4及 Fe^(3+)O_4四面体结构单元,玻璃结构中具有和钙铁透辉石结构类似的近程排列,这个近程排列具有析出主晶相(钙铁透辉石)的先驱结构.随核化时间延长及晶化温度提高,红外最强吸收带朝低波数方向移动,吸收带强度随晶化温度的提高而明显增大.随Fe_2O_3含量增加,网络无序度增大,玻璃红外吸收谱带也向低波数方向移动. FTIR absorption spectra and XRD were used to study the structure of glasses using red mud as raw materials. The results indicate that Ca(Fe, Mg)Si_2O_6 and 2C_aO.AL_2O_3.SiO_2 precfpitate as primary and minor crystalline phase respectively on crystallization processes of glasses. Glasses have interlinked SiO_4, AIO_4 and Fe(3+)O_4 tetrahedra as their most fundamental units with K^+, Na^+, Fe^(2+) and some Fe^(3+) ions acting as charge balancing canons. The shortrange order which is similar to the structure of Ca(Fe, Mg)Si_2O_6 exists in the glasses and has the precursor structures of primary crystalline phase. With the increase of Fe_2O_3 content, the random state of glass structure increases. The absorption bands of FTIR spectra become broaden and shift from the high frequency region to lower frequencies. With prolonging nucleation time and improving crystallization temperature, the strongest absorption bands also shift from the high frequency region to lower frequencies.
出处 《无机材料学报》 SCIE EI CAS CSCD 北大核心 2000年第4期751-755,共5页 Journal of Inorganic Materials
基金 国家自然科学基金!(29761001) 广西"十百千人才工程"专项基金资助 广西教育厅科研基金及广西自然科学基金匹配(桂科配
关键词 赤泥 玻璃结构 红外吸收光谱 玻璃原料 玻璃晶化 red mud, structure of glass, FTIR absorption spectra
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