CaO-MgO-Al_2O_3-SiO_2-P_2O_5-F系统玻璃的结构、分相和晶化

STRUCTURE. PHASE SEPARATION AND CRYSTALLIZATION OF CaO-MgO-Al_2O_3-SiO_2-P_2O_5-F GLASSES

本文应用IR光谱、Raman光谱、TEM、DTA、XRD和EDAX等技术,系统研究了P_2O_5对CaO-MgO-Al_2O_3-SiO_2-P_2O_5-F系统玻璃的结构、分相和晶化的影响,并对它们之间的关系作了详细阐述。实验表明,该系统中的玻璃具有二相分离结构,液滴相富含P^(5+)、Ca^(2+)、Mg^(2+)等离子,基底相富含Si^(4+)、Al^(3+)等离子,引入不同量的P_2O_5,玻璃分相的程度也不同,这对玻璃结构的聚合程度以及玻璃的晶化有显著影响。

By means of IR and Raman spectra, TEM, DTA, XRD and EDAX techniques, the influence of P_2O_5 on structure, phase separation and crystallization of CaO-MgO-Al_2O_2-SiO_2-P_2O_5-F glasses was investigated and the relationship among them is described in detail. The results show that glasses in the system bays tow-phase separation structure, the droplet phase is rich in P^(5+), Ca^(2+), Mg^(2+) and the matrix phase is rich in Si^(4+), Al^(3+). Adding different amount of P_2O_5, the extent of glass phase separation is different, and it has marked influence on glass polymerization degree and crystallization process.