(東北大學 冶金學院，沈陽 110819)
摘 要: 采用拉曼光譜并結合黏度、電導率等物理性質檢測，研究了不同乙酸根、草酸根濃度下鋁酸鈉溶液中鋁酸根離子結構及其物理性質變化規(guī)律。結果表明：中低濃度的鋁酸鈉溶液中 為鋁酸根離子的基本形態(tài)，隨著苛堿濃度的增加出現二聚體 ，且兩種離子數量隨苛堿濃度的增加而上升。鋁酸鈉溶液中 和CH3COO-的拉曼光譜特征峰分別為918 cm-1、931 cm-1。CH3COO-和 對鋁酸鈉溶液中鋁酸根陰離子的影響基本相同，隨著鋁酸鈉溶液中CH3COO-或 濃度的增加，四面體 和二聚體 都逐漸增多，同時 向 發(fā)生了轉化。隨著CH3COO-或 濃度的增加，鋁酸鈉溶液的黏度升高，電導率下降，最后獲得不同CH3COO-或 濃度下鋁酸鈉溶液在不同溫度的黏度和黏流活化能計算方程。
關鍵字: 鋁酸鈉溶液；拉曼光譜；黏度；電導率；有機物
（School of Metallurgy, Northeastern University, Shenyang 110819, China）
Abstract:The ionic structure of aluminate anions and the physical properties of sodium aluminate solution with different acetate and oxalate concentrations were investigated by Raman spectroscopy combined with the physical properties of viscosity and conductivity test. The results show that the tetrahedron of is the basic form of aluminate ions in low and medium concentration of sodium aluminate solution, and the dimer of exists with the increase of solution concentration. The contents of and in sodium aluminate solution increase as the concentration of caustic alkali increases. The Raman characteristic peak of and CH3COO- in sodium aluminate solution are 918 cm-1 and 931 cm-1, respectively. The effects of CH3COO- and on the structure of aluminate anions in sodium aluminate solution are basically the same, with the increase of CH3COO- or in sodium aluminate solution, the contents of and increase gradually, and transforms to at the same time. The viscosity of sodium aluminate solution increases and the conductivity decreases with the increase of the CH3COO- or concentration. The calculation equation for viscosity and viscous flow activation energy of sodium aluminate solution with different CH3COO- or concentrations at different temperatures are finally obtained.
Key words: sodium aluminate solution; Raman spectra; viscosity; conductivity; organic compound
