298K时三元体系K^+/CO_3^(2-),B_4O_7^(2-)-H_2O和Li^+/CO_3^(2-),B_4O_7^(2-)-H_2O相关系

AN EXPERIMENTAL STUDY ON THE EQUILIBRIUM PHASE DIAGRAM AND SOLUTION PROPERTIES OF THE TERNARY SYSTEMS Li +/CO 3 2- ,B 4O 7 2- H 2O AND K +/CO 3 2- ,B 4O 7 2- H 2O AT 298 K

研究了二个三元体系Ｌｉ＋／ＣＯ２－３，Ｂ４Ｏ２－７Ｈ２Ｏ（１）和Ｋ＋／ＣＯ２－３，Ｂ４Ｏ２－７Ｈ２０（２）２９８Ｋ时的相平衡关系和平衡液相的物化性质（密度、折光密、粘度、电导率、ｐＨ值）。研究表明：这二个三元体系均属简单共饱型，无复盐或固溶体形成。体系（１）的两段溶解度曲线对应于无水Ｌｉ２ＣＯ３和Ｌｉ２Ｂ４Ｏ７·３Ｈ２Ｏ结晶区，体系（２）的两段溶解度曲线对应于Ｋ２ＣＯ３·３／２Ｈ２Ｏ和Ｋ２Ｂ４Ｏ７·４Ｈ２Ｏ结晶区。

Solubilities and physicochemical properties (density,refractive index,viscosity,conductivity and pH) of solutions in the ternary systems Li +/CO 3 2- ,B 4O 7 2- H 2O (1) and K +/CO 3 2- ,B 4O 7 2- H 2O (2) were investigated at 298 K with isothermal method.The two ternary systems are all of simple eutectic type and no complex salt or solid solution were found in the systems.Two solubility curves of the system(1) correspond to the crystallization fields of Li 2CO 3 and Li 2B 4O 7·3H 2O,and those of system (2) correspond to the crystallization fields of K 2CO 3·3/2H 2O and K 2B 4O 7·4H 2O.