P2O5对Na2O-Al2O3-SiO2系统玻璃结构和分相的影响  

Effects of P2O5 on the Structure and Phase Separation of Na2O-Al2O3-SiO2 Glasses

作　　者：昝昱廷 陆平[1,2] 牛韵雅[2] ZAN Yu-ting;LU Ping;NIU Yun-ya(School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China)

机构地区：[1]武汉理工大学材料科学与工程学院,武汉430070 [2]武汉理工大学硅酸盐建筑材料国家重点实验室,武汉430070

出　　处：《硅酸盐通报》2019年第8期2492-2496,2505,共6页Bulletin of the Chinese Ceramic Society

基　　金：国家重点研发计划(2016YFB0303701)

摘　　要：通过制备25Na2O-(25-x)Al2O3-50SiO2-xP2O5(x≤25mol%)系统玻璃,并且采用Raman和SEM,研究了高含量P2O5对Na2O-Al2O3-SiO2系统玻璃结构和分相的影响。结果表明:随着P2O5的不断加入,作为电价平衡体的Na+被逐渐释放,并且充当了网络改变体的角色,造成了硅酸盐网络结构聚合度降低,而磷酸盐网络结构聚合度增大。随着P2O5的不断加入且Al/P<1时,该系统玻璃发生稳定分相,而且分相机理也由成核-生长转变为亚稳分解。The 25Na 2 O-(25-x)Al 2 O 3-50SiO 2-x P 2 O 5(x≤25mol%)glasses were prepared,and the effect of high content of P 2O 5 on the glass structure and phase separation of Na 2 O-Al 2 O 3-SiO 2 glasses were investigated by Raman and SEM.The results show that with the addition of P 2O 5,Na+which acts as charge compensator is gradually released and acts as network modifiers,which causes depolymerization of the silicate structure and an increase in the degree of polymerization of the phosphate structure.With the addition of P 2 O 5 and when Al/P<1,stable phase separation occurs,and the mechanism of phase separation changes from nucleation-growth to spinodal decomposition.

关 键 词：Na2O-Al2O3-SiO2-P2O5系统玻璃 玻璃结构 RAMAN 分相机理 

分 类 号：TQ171[化学工程—玻璃工业]