铁磷摩尔比对含锆铁磷酸盐玻璃陶瓷结构和化学稳定性的影响

Influence of Fe/P Mole Ratio on Structure and Chemical Durability of Iron-Phosphate Glass-Ceramics With ZrO_(2)

以P_(2)O_(5)-Fe_(2)O_(3)-Al_(2)O_(3)-Na_(2)O四元玻璃作为基础,掺入x=6%(摩尔分数)的ZrO_(2),改变基质玻璃的Fe/P摩尔比(r(Fe/P)),采用熔淬法制备一系列玻璃陶瓷样品,研究含ZrO_(2)的玻璃陶瓷结构和化学稳定性随Fe/P摩尔比的变化。X射线衍射用于物相分析,拉曼光谱、X射线光电子能谱和穆斯堡尔谱用于结构分析。Fe/P摩尔比小于0.18时,样品中Fe^(3+)的相对含量(n(Fe^(3+))/(n(Fe^(2+))+n(Fe^(3+)))摩尔比)随着r(Fe/P)增加而增多;r(Fe/P)介于0.18~0.32时,n(Fe^(3+))/(n(Fe^(2+))+n(Fe^(3+)))在60%左右波动。r(Fe/P)介于0.2~0.3时,样品的化学稳定性最好。

In order to study the changes of the structure and chemical durability with Fe/P mole ratio(r(Fe/P)), a series of P_(2)O_(5)-Fe_(2)O_(3)-Al_(2)O_(3)-Na_(2)O-ZrO_(2)glass-ceramic samples with different Fe/P mole ratios were prepared by the melting-quenching method. X-ray diffraction was used for phase analysis, and Raman spectroscopy, X-ray photoelectron spectroscopy and M9ssbauer spectroscopy were used for structural analysis. n(Fe^(3+))/(n(Fe^(2+))+n(Fe^(3+))) mole ratios increase with the increase of Fe/P mole ratio when the Fe/P mole ratio is less than 0.18. When the Fe/P mole ratio is between 0.18 and 0.32, n(Fe^(3+))/(n(Fe^(2+))+n(Fe^(3+))) fluctuates around 60%. The samples with Fe/P mole ratio between 0.2 and 0.3 have the best chemical durability and relatively low crystal fraction.