Preparation and characterisation of high refractive index PbO-TiO2-TeO2 glass systems

• Published in: Journal of materials chemistry 1996, Vol.6 (11), p.1811-1814
• Main Authors: CUEVAS, R. F, DE PAULA, A. M, ALVES, O. L, ARANHA, N, SANJURJO, J. A, CESAR, C. L, BARBOSA, L. C
• Format: Article
• Language: English
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Condensed matter: structure, mechanical and thermal properties; Disordered solids; Exact sciences and technology; Glasses; Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity); Optical constants: refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity; Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation; Optical properties of bulk materials and thin films; Physics; Structure of solids and liquids; crystallography
• ISSN: 0959-9428; 1364-5501
• DOI: 10.1039/JM9960601811

PbO-TiO2-TeO2 glasses with a high refractive index were prepared and characterised. Highly homogeneous glasses were obtained by agitating the oxide mixture during melting in an alumina crucible. XRD, density, dilatometry, Raman scattering, light absorption and linear refractive index measurements were performed. The results show a change in the glass structure as the PbO content increases: the TeO4 trigonal bipyramids characteristic of TeO2 glasses transform into TeO3 trigonal pyramids. However, the measured refractive indices are almost independent of the glass composition. Third-order non-linear optical susceptibilities calculated from the measured refractive indices using Lines' theoretical model are also shown to be independent of the glass composition. 13 refs.