赤泥黑色玻璃结构的研究

Structure of Black Glass Made of Red Mud as Raw Materials

利用穆斯堡尔谱(M ssbauer)和红外吸收光谱技术对赤泥黑色玻璃的结构进行了研究。结果表明 :玻璃中有处于八面体两种不同配位位置的Fe2 + 及处于四面体和八面体两种配位位置的Fe3 + 。玻璃网络中主要有SiO4、AlO4 及Fe3 + O4 四面体结构单元 ,K+ 、Na+ 、Fe2 + 及部分Fe3 + 处于维持电荷平衡位置。随Fe2O3 含量增加 ,玻璃中Fe2 + 相对含量增加 ,网络无序度增大 ,玻璃红外吸收谱带向低波数方向移动。

Mssbauer spectrometry and FTIR spectrometry were used to study the structure of the black glass made of red mud as raw materials. The results indicate that Fe3+ cations are present in both tetra _ and octahedral coordination sites, while Fe2+ cations in two different coordination sites of octahedron. There exsist interlinked SiO4, AlO4 and Fe3+O4 tetrahedrons as main fundamental structural units in the glass, in which K+, Na+, Fe2+ and some Fe3+ act as charge _ balancing cations. With the increase of Fe2O3 content, the relative content of Fe2+ and the degree of random of the glass structure increase. The absorption bands of FTIR spectra become broaden and shift from the high frequency region to lower frequencies.