Premium
Optical properties, thermal stability, and forming region of high refractive index La 2 O 3 –TiO 2 –Nb 2 O 5 glasses
Author(s) -
Mao Zhaozhao,
Wang Chaoyue,
Zheng Xiaojie,
Yu Jianding,
Xiong Liangming
Publication year - 2018
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.15316
Subject(s) - refractive index , materials science , polarizability , high refractive index polymer , thermal stability , analytical chemistry (journal) , molar volume , optics , oxide , dispersion (optics) , mineralogy , chemistry , optoelectronics , thermodynamics , physics , organic chemistry , chromatography , molecule , metallurgy
The high refractive index La 2 O 3 –TiO 2 –Nb 2 O 5 glasses were prepared by containerless processing, and the glass‐forming region was determined. The refractive index showed the range from 2.20 to 2.32, and the values were much higher than those of most optical glasses. The completely miscible 30LaO 3/2 –(70− x )TiO 2 – x NbO 5/2 (0 ≤ x ≤70) system was fabricated to study the compositional dependence of refractive index and optical transmittance. The crucial determinants of the refractive index of oxide glasses, oxygen molar volume, and electronic polarizability of oxygen ions were calculated. The principle of additivity of glass properties was suitable for the calculation of refractive index between glass and compositional oxides. All the glasses were colorless and transparent in the visible to 6.5 μm middle infrared ( MIR ) region. These results are useful for designing new optical glasses with high refractive index and low wavelength dispersion in wide optical window.