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本文首次测定了四元体系Na2B4O7Na2CO3NaHCO3NaBO2H2O在0℃和15℃时的等温溶度和饱和溶液的折光率绘制了相应的溶度图。在0～15℃时该四元体系为简单体系对应4个组分盐或其水合物有4个单饱和结晶区、5条双饱和结晶线和2个三饱和点。
In this paper, we first determine the isothermal solubility of the quaternary system Na2B4O7Na2CO3NaHCO3NaBO2H2O at 0 ℃ and 15 ℃ and the refractive index of the saturated solution. At 0 ~ 15 ℃, the quaternary system is a simple system corresponding to the four component salts or hydrates there are four single saturated crystallization zone, five double saturated crystallization line and two three saturation points.