Study of the optical properties of TeO2-PbO-TiO2 glass system

Abstract

Recebido em 2/12/96; aceito em 18/2/97We describe the preparation and some optical properties of high refractive index TeO 2 -PbO-TiO 2 glass system. Highly homogeneous glasses were obtained by agitating the mixture during the melting process in an alumina crucible. The characterization was done by X-ray diffraction, Raman scattering, light absorption and linear refractive index measurements. The results show a change in the glass structure as the PbO content increases: the TeO 4 trigonal bipyramids characteristics of TeO 2 glasses transform into TeO 3 trigonal pyramids. However, the measured refractive indices are almost independent of the glass composition. We show that third-order nonlinear optical susceptibilities calculated from the measured refractive indices using Lines' theoretical model are also independent of the glass composition.

Impact of PbO on structural, thermal, optical and gamma ray shielding behaviour of TeO2-CdO based glasses

“…The vibrational band at 138 cm −1 indicates the presence of PbO in the ternary composite. This is consistent with the composition of the glass, which contains PbO as one of its components [38,39]. The Raman band at 738 cm −1 shows the existence of [TeO 3 ] 2-/[TeO 3+1 ] 4functional groups.…”

Glassy State Lead Tellurite Nanobelts: Synthesis and Properties

“…Basic structure units of TeO 4 trigonal bipyramid (tbp), TeO 3+1 polyhedra, TeO 3 trigonal pyramid (tp), and Te-eqOax-Te bond exist in TeO 2 -based glasses [ 21 ], and the structural change of [TeO 4 ] → [TeO 3+1 ] → [TeO 3 ] takes place along with the addition of modifier oxides. When PbO exists in the tellurite-based molten system, a large number of –O–Pb–O– linkages [ 22 ] with [PbO 6 ] octahedra and [OPb 4 ] and [PbO 4 ] tetrahedra form and enter [TeO 4 ] and [TeO 3 ] network, and forms glass phase when the system cools down, because PbO can function as outside body or glass adjusting agent during the glass formation [ 23 ]. In this work, Pb(NO 3 ) 2 reacts with H 2 O to produce Pb(OH) 2 , and then form PbO polyhedra, which enter the Te–O-based network, and forms Pb–Te–O glass phase.…”

Understanding the influence of tellurium oxide in front Ag paste for contacting silicon solar cells with homogeneous high sheet resistance emitter

“…This result is quite consistent with the phase changes with TeO 2 before and after anneal at high temperatures. [18][19][20][21][22][23] Typically after annealing, there is a formation of the γ-TeO 2 , which is a crystalline phase. 24) The Raman spectra in Fig.…”