INTERPRETATION OF GLASS CHEMISTRY IN TERMS OF OPTICAL BASICITY CONCEPT
INTERPRETATION OF GLASS CHEMISTRY IN TERMS OF OPTICAL BASICITY CONCEPT
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DOI：
10.1016/0022-3093(76)90027-2
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发表时间：
1976-01-01
影响因子：
3.5
通讯作者：
INGRAM, MD
中科院分区：
文献类型：
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作者：
DUFFY, JA;INGRAM, MD
氧化物玻璃的碱度可以从探测离子如Pb2+的紫外(UV)(S-p)光谱的频移实验中测量出来，并可以用光学碱度Λ的数值尺度来表示(理想情况下，Λ介于0和1之间)。Λ可能与(I)组成和(Ii)阳离子(如Na+、Si4+等)的电负性有关。该关系允许显微光学碱度λ被分配给玻璃中的单个氧化物和含氧基团。这些微观光学碱度被用来解释玻璃物理和化学的各个方面，包括折射率、网络配位数变化、化学耐久性、玻璃电极、紫外线透明度以及玻璃对金属离子的宿主行为。还讨论了从一种碱金属氧化物到另一种碱金属氧化物时玻璃碱度的变化。最后，讨论了光学碱度的概念，它既是一个实验获得的量，也是一个由玻璃组成和电负性计算出来的数字，与玻璃中酸碱行为的传统方法相联系。
The basicity of an oxide glass can be measured experimentally from the frequency shifts in the ultra-violet (UV) (s-p) spectra of probe ions such as Pb2+and can be expressed on the numerical scale ofoptical basicityΛ (ideally Λ lies between zero and unity). It is possible to relate Λ with (i) the constitution, and (ii) the electronegativity of the cations (e.g. Na+, Si4+, etc.) of the glass, and the relationship allowsmicroscopic optical basicitiesλ to be assigned to individual oxides and oxy-groups in the glass. These microscopic optical basicities are used for interpreting various aspects of the physics and chemistry of glass including refractivity, network coordination number changes, chemical durability, the glass electrode, UV transparency and the host behaviour of glass towards metal ions generally. Changes in glass basicity in going from one alkali metal oxide to another are also discussed. Finally, the concept of optical basicity, both as an experimentally obtained quantity and as a number calculated from glass constitution and electronegativity, is discussed in relation to the traditional approach to acid-base behaviour in glass.