Structural investigation of CaO-Al2O3 and CaO-Al2O3-CaF2 slags via Fourier transform infrared spectra
Structural investigation of CaO-Al2O3 and CaO-Al2O3-CaF2 slags via Fourier transform infrared spectra
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DOI：
10.2355/isijinternational.42.38
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发表时间：
2002-01-01
影响因子：
1.8
通讯作者：
Song, HS
中科院分区：
文献类型：
--
作者：
Park, JH;Min, DJ;Song, HS
测定了CaO-Al_2O_3和CaO-Al_2O_3-CaF_2渣系的FT-IR光谱，以了解（氟）铝酸盐渣系的结构方面。根据Al-O键的键长与力常数的关系，对CaO-Al_2O_3渣的红外光谱进行了解释，并讨论了F~-离子在铝酸盐网络解聚中的作用。[AlO_4]-四面体的波数高于[AlO_6]-八面体的波数可能是由于四面体中Al-O键长短于八面体中Al-O键长所致。在CaO-Al_2O_3-CaF_2体系中，[AlO（n）F（4-n）]-配合物的红外透射谱带贯穿整个氟铝酸盐体系，而[AlO（4）]-四面体、[AlO（6）]-和[AlF（6）]-八面体的红外透射谱带则出现在CaF_2小于24.0（mol %）时。在含26.2（mol %）Al_2O_3的体系中，仅在2-液体边界处显示了互连的[AlO（4）]-四面体带，而在含41.5（mol %）Al_2O_3的体系中，这些带显示在整个组成区域中。在41.7和51.0（mol %）CaO-Al_2O_3-CaF_2体系中，[AlOnF_4-n]-配合物的透射带贯穿整个组成，而[AlO（4）]-四面体的透射带则在X-CaF_2/X（Al_2O_3）≤ 1.0时出现。此外，在含CaO 51.0（摩尔%）的炉渣中表示[AlO（4）]-四面体的谱带的相对强度远小于含CaO 41.7（摩尔%）的系统中的谱带的相对强度。
The FT-IR spectra of the CaO-Al2O3 and CaO-Al2O3-CaF2 slags were measured to understand the structural aspects of (fluoro-) aluminate slags. The infrared spectra of the CaO-Al2O3 slag was interpreted based on the relationship between bond length and force constant of Al-O bond, Thereafter, the role of F- ions in the depolymerization of aluminate network was discussed. The wavenumbers of [AlO4]-tetrahedra higher than that of [AlO6]-octahedra would be originated from the Al-O bond length in tetrahedra shorter than that in octahedra. In the CaOsetd-Al2O3-CaF2 system, the IR-transmitting bands of [AIO(n)F(4-n)]-complexes are observed through the entire composition of the fluoroaluminate system, while the bands of [AIO(4)]-tetrahedra, [AIO(6)]- and [AIF(6)]-octahedra appear in the composition less than 24.0 (mol%) CaF2. In the 26.2 (mol%) Al2O3-containing system, the bands of interlinked [AIO(4)]-tetralhedra are shown at only 2-liquids boundary, while these bands are shown in the whole composition region in the 41.5 (mol%) Al2O3-containing system. In the 41.7 and 51.0(mol%)CaO-Al2O3-CaF2 systems, the transmitting bands of [AlOnF4-n]-complexes are observed through the entire composition, while those of [AIO(4)]-tetrahedra are shown in the composition of X-CaF2/X(Al2O3)less than or equal to1.0. Also, the relative intensity of the bands indicating [AIO(4)]-tetrahedra in the 51.0 (mol%) CaO-containing slag is much less than that in the 41.7 (mol%) CaO-containing system.