【摘要】 报导了用高温激光Raman光谱仪测定了不同温度 (至 1 2 73K)下固体和熔融态的Li2 CO3、Na2 CO3和K2 CO3的Raman光谱 ,分析了CO2 -3 对称伸缩振动模随温度升高的波数移动情况和半高宽的变化 ,结合前人的振动光谱和X射线测试结果以及分子动力学模拟工作 ,讨论了碳酸盐熔体的结构特征 ,以及不同的碱金属离子对碳酸根离子的振动造成的不同影响更多还原

【Abstract】 Raman spectra of solid and molten Li 2CO 3, Na 2CO 3 and K 2CO 3 at various temperature up to 1273K have been reported. Frequencies shifting with increasing temperature of the symmetric stretch vibrational mode of CO 2- 3 and FWHH of the bands were analyzed. Combining with reported vibrational spectra, X-ray and MD simulation work of the carbonates, the structure characteristics of the carbonate melts and different effects on the vibrational behavior which is due to the alkali cations were discussed.更多还原