论文部分内容阅读
采用差势分析和X-射线粉末衍射等方法研究了低温相偏硼酸钡(β-BaB_2O_4)水盐体系的相平衡关系。实验结果表明:在低于40℃时形成的水合物为BaB_2O_4·3.5H_2O,高于70℃时形成的水合物为BaB_2B_2O_4·1.5H_2O,在40-70℃时形成的水合物为两相混合物。在常温常压下,体系中并没有观察到β-BaB_2O_4单晶的形成。
The phase equilibrium of low-temperature barium-bentonite (β-BaB_2O_4) water-salt system was studied by means of difference analysis and X-ray powder diffraction. The experimental results show that the hydrate is BaB 2 O 4 3.5H 2 O below 40 ℃, BaB 2 B 2 O 4 1.5H 2 O above 70 ℃, and the hydrate is a two-phase mixture at 40-70 ℃. At room temperature and pressure, the system did not observe the formation of β-BaB_2O_4 single crystal.