INFLUENCE OF PREPARATIVE HISTORY ON STRUCTURE AND PROPERTIES OF SODIUM ALUMINATE SOLUTIONS

来源期刊：中国有色金属学报(英文版)1992年第2期

论文作者：Chen, Nianyi Liu, Miaoxiu Yang, Jinxiu Chi, Likuan

文章页码：28 - 31

Key words：sodium aluminate solutions； physico-chemical properties； structure； preparative history

Abstract: It has been found that samples of sodium aluminate solutions with the same composition but different preparative history may have different structure and physico-chemical properties. The structure of sodium aluminate solutions change very slowly during the storage after preparation. Sodium aluminate solutions contain several aluminium-bearing anions such as Al(OH)₄^-,. Al(OH)₆^3- and [(HO)₃Al-O-Al(OH)₃]^2-, etc. These anions can convert to each other but the reactions are very slow owing to the formation or breakage of covalent Al-O bond. Hence the ratio between these anions approaches equilibrium very slowly after the preparation, and the structure or properties of these solution samples before equilibrium is reached depend on their preparative histories.