Reactions of calcium silicates in solution in liquid calcium fluoride
Reactions of calcium silicates in solution in liquid calcium fluoride
复制标题
硅酸钙在液体氟化钙溶液中的反应
DOI：
10.1039/tf9676301408
复制
发表时间：
1967
影响因子：
--
通讯作者：
A. Mitchell
中科院分区：
文献类型：
--
作者：
A. Mitchell
在1420°C下，通过淬火薄膜的红外光谱和通过在溶液上产生的SiF 4压力的蒸发测量，在0.1 M CaSi 2 O 5 + 0.9 M CaF 2至0.1 M Ca 3SiO 5 +0.9 M CaF 2的组成范围内，研究了CaO+SiO2系统。热化学的结果表明，硅酸盐离子，在0.1 M的CaSi 2 O 5，+0.9 M的CaF 5，在较高的氧化物浓度减少的一个周期。光谱结果表明，猝灭溶液中的离子与结晶硅酸盐中的离子非常相似，偏硅酸根离子以链状离子而不是环状离子形式存在。有人建议，氟硅酸盐离子将是不稳定的淬火，并因此将存在于不足的浓度，以产生可识别的Si-F带淬火溶液的红外光谱。
The system CaO+SiO2 has been studied at 1420°C in the composition range 0.1 M CaSi2O5+0.9 M CaF2 to 0.1 M Ca3SiO5+0.9 M CaF2, through the infra-red spectra of quenched thin films and by transpiration measurements of the SiF4 pressure developed over the solutions. Thermochemical results suggest a fluorination of the silicate ions, in 0.1 M CaSi2O5,+0.9 M CaF5, decreasing at higher oxide concentrations. Spectroscopic results show that the ions in quenched solutions are closely similar to those in crystalline silicates, and that meta-silicate ions exist as chain-ions rather than rings. It is suggested that fluoro-silicate ions would be unstable on quenching, and would therefore be present in insufficient concentration to give rise to Si—F bands identifiable in the infra-red spectra of quenched solutions.