摘要
研究Ｐ２Ｏ５－ＢａＯ－Ｎｂ２Ｏ５三元系统的玻璃形成区，给出了该三元系统玻璃形成范围．结果发现该系统在网络形成体Ｐ２Ｏ５的摩尔分数仅为２０％，Ｎｂ２Ｏ５的摩尔分数为３０％，ＢａＯ的摩尔分数为５０％的成分点仍成玻璃．讨论了Ｎｂ２Ｏ５在系统中的作用以及部分玻璃的着色问题．熔制了ＢａＯ的摩尔分数恒定为５０％的（５０－ｘ）Ｐ２Ｏ５－ｘＮｂ２Ｏ５－５０ＢａＯ（ｘ＝０，１，１０，２５，３０）和Ｎｂ２Ｏ５的摩尔分数恒定为１０％的ｙＰ２Ｏ５－１０Ｎｂ２Ｏ５－（９０－ｙ）ＢａＯ（ｙ＝４０，５０，６０，７０）玻璃．测定了其折射率、Ａｂｂｅ数、非线性折射率、转变温度、析晶温度、熔化温度、氧原子摩尔体积及密度和组成之间的关系，并从红外吸收光谱的结果初步探讨该玻璃结构．认为在该系统中Ｎｂ２Ｏ５的作用介于网络形成体和中间体之间．玻璃着色的原因是Ｎｂ５＋被还原．
The ternary P 2O 5-BaO-Nb 2O 5 glass was synthesized and formation range of glass of P 2O 5-BaO-P 2O 5 system was investigated. It is found in this ternary system glass can be formed even when the network former P 2O 5 is 20%. The effects of Nb 2O 5 on glass formation and colouring of glass are discussed. The (50- x )P 2O 5- x Nb 2O 5-50BaO( x =0,1,10,25,30) and y P 2O 5-10Nb 2O 5-(90- y )BaO( y =40,50,60,70) glass were prepared. The relations among glass composition, physical properties (such as refractive index, density etc.) and thermal stability were studied. The glass structures also preliminarily researched through analysis of their infrared spectra. It is considered that Nb 2O 5 is an intermediate oxide, and colouring of glass is affected by the valence of niobium.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1999年第1期48-53,共6页
Journal of The Chinese Ceramic Society
