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Electronic polarizability in silicate glasses by comparison of experimental and theoretical optical basicities
Author(s) -
Komatsu Takayuki,
Dimitrov Vesselin,
Tasheva Tina,
Honma Tsuyoshi
Publication year - 2021
Publication title -
international journal of applied glass science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.383
H-Index - 34
eISSN - 2041-1294
pISSN - 2041-1286
DOI - 10.1111/ijag.16009
Subject(s) - polarizability , silicate , ternary operation , refractive index , materials science , silicate glass , oxide , inorganic chemistry , mineralogy , analytical chemistry (journal) , chemistry , metallurgy , molecule , organic chemistry , optoelectronics , computer science , programming language , composite material
The concept of optical basicity proposed by Duffy has been recognized as an extremely important issue in science and technology of glasses. In this article, the refractive index ( n o )‐based optical basicity Λ( n o ) of some binary and ternary silicate glasses was evaluated using the Lorentz–Lorenz formula, and the discrepancy between the values of Λ( n o ) and the theoretically calculated optical basicity Λ th was analyzed to understand more deeply the electronic polarizability in binary and ternary silicate glasses. A suitable value of the optical basicity for each oxide predicting a good quantitative composition dependence of optical basicity in a given glass system was proposed. The suitable value of SiO 2 for the prediction of the optical basicity of silicate glasses is Λ(SiO 2 glass) = 0.53, which is larger than the value of Λ(SiO 2 oxide) = 0.48 being used in the calculation of Λ th so far. Other suitable values such as Λ(Al 2 O 3 glass) = 0.62 and Λ(TiO 2 glass) = 1.04 were proposed. The relationship between the optical basicity and coordination structure in some oxides in silicate glasses was discussed.