高浓度稀土掺杂硼硅酸盐磁光玻璃化学稳定性的研究(英文)  

STUDY ON THE CHEMICAL STABILITY OF BOROSILICATE MAGNETO-OPTICAL GLASS HEAVILY DOPED WITH RARE EARTH

作　　者：章春香[1] 殷海荣[1] 刘立营[1] 陈国平[1] 唐保军[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,陕西西安710021

出　　处：《陕西科技大学学报（自然科学版）》2008年第4期27-31,41,共6页Journal of Shaanxi University of Science & Technology

基　　金：国家十一五科技支撑计划重大项目(2006BAF02A26)

摘　　要：采用传统熔融冷却工艺制备了高浓度稀土掺杂磁光玻璃,并利用粉末法测定了硼硅酸盐稀土磁光玻璃的化学稳定性.通过讨论稀土离子浓度、稀土离子极化能力和侵蚀时间等因素对玻璃化学稳定性能的影响,研究了磁光玻璃的侵蚀机理与规律.结果表明:稀土硼硅酸盐磁光玻璃的耐碱性能最佳,耐水性能次之,耐酸性能最差.由于稀土氧化物能够提供游离氧且稀土离子具有较强的积聚能力,因此适当地提高其在玻璃体中的浓度有利于增强玻璃网络结构,提高玻璃的化学稳定性,且稀土离子极化能力越强,玻璃化学稳定性越好.此外,随着侵蚀时间的延长,玻璃表面产生覆盖层,从而使玻璃的溶解速率减缓.Magneto-optical glass heavily doped with rare earth was prepared by a conventional melt-quenching technique and the glass chemical stability was studied by powder method. The erosion mechanisms and regulations of magneto-optical glass were investigated by dis- cussing the influences of the earth ions concentration, ions polarization ability and erosion time on magneto-optical glass chemical stability. The results showed that the acid-resistant capacity of magneto-optical glass was the worst, the water-resistant capacity was secondary, and the alkali-resistant capacity was the best. The glass network structure and the chemical stability could be improved by appropriately introducing rare earth oxides into the magneto- optical glass, since the rare earth ions could provide free oxygen and had strong ability of ac- cumulation. Moreover, the stronger of rare earth ions polarization ability, the more stable of glass chemical stability. Besides, glass dissolution rate was decreased because of the surface overlay coming forth as time going on. Key words：

关 键 词：磁光玻璃 硼硅酸盐玻璃 化学稳定性 侵蚀机理 稀土 

分 类 号：TQ171.718.3[化学工程—玻璃工业]