三元体系Na_2B_4O_7-NaHCO_3-H_2O和Na_2CO_3-NaBO_2-H_2O等温溶解度研究

Study on the Isothermal Solubility for the Ternary System Na_2B_4O_7-NaHCO_3-H_2O and Na_2CO_3-NaBO_2-H_2O

作为研究四元体系Ｎａ２Ｂ４Ｏ７－Ｎａ２ＣＯ３－ＮａＨＣＯ３－ＮａＢＯ２－Ｈ２Ｏ的开端，测定了三元体系Ｎａ２Ｂ４Ｏ７－ＮａＨＣＯ３－Ｈ２Ｏ和Ｎａ２ＣＯ３－ＮａＢＯＨ２－Ｈ２Ｏ在０℃、１５℃－４５℃时的溶解度，绘制了相应的组成－性质图。两个三元体系的溶度图在研究温度范围内均属于低共饱型，平衡固相为组分化合物或其水合物。

In order to study on the quaternary system Na2B4O7-Na2CO3-NaHCO3-NaBO2-H2O, for its boundary System Na2B4O7-NaHCO3-H2O and Na2CO3-NaBO2-H2O, we determined solubilities and refractive index in these two system at 0℃. 15℃ and 45℃. These two system are simple eu- tonic type.