On the structure of the disordered Bi2Te4O11 phase

Highly Transparent Fluorotellurite Glass-Ceramics: Structural Investigations and Luminescence Properties

“…Among reported anti-glasses, can be cited. [24][25][26][27][28] The resulting 65TeO 2 -35ZrF 4 glass-ceramics are highly transparent due to the presence of nanocrystals even when stabilizing two different crystalline phases i.e the unreported antiglass and the cubic ZrTe 3 O 8 phases while maintaining very low hydroxyls groups content due to the presence of fluorine in the composition. These glass-ceramics have been investigated in details by means of X-ray diffraction, 19 F, 91 Zr and 125 Te NMR, Raman spectroscopy, scanning and transmission electron microscopies.…”

“…As previously mentioned, antiglass materials are also called “glasses of anions” in reference to the disorder on anion sites. Among the reported antiglasses, SrTe 5 O 11 , Ln 2 Te 6 O 15 , Bi 2 Te 4 O 11 , Bi 0.5 Nb 0.5 Te 3 O 8 , and Bi 0.8 Nb 0.8 Te 3 O 8 materials can be cited. − As well, it is important to emphasize that this peculiar and soft devitrification process is a powerful tool to produce such novel phases. − …”

Influence of Ho2O3 on Optimizing Nanostructured Ln2Te6O15Anti‐Glass Phases to Attain Transparent TeO2‐Based Glass‐Ceramics for Mid‐IR Photonic Applications

“…[16] It could be understood that the presence of chains of corner linked TeO 3 and TeO 4 coordination polyhedral at an equal proportion and the presence of modifier cations surrounded by NBOs in the form of octahedral units lend the formation of tellurium-rich anti-glass phase. [28,29] Therefore, it is apparently clear that selecting more appropriate tellurium-based glass composition and executing the controlled crystallization process support the development of nanostructured crystalline phases to obtain transparent GCs, which can further be utilized in nonlinear and NIR/mid-IR (MIR) photonic applications.…”

“…[16,25] Nevertheless, the formation of tellurium-rich crystalline phase from the glassy matrix upon heating primarily depends on the concentration of the type of network structural units, such as TeO 4 , TeO 3 þ 1, and TeO 3 , as well as the linkages between these structural units. [28,29] The transparent GCs with the growth of nanostructured Bi 0.5 Nb 0.5 Te 3 O 8 (an analogous to the β-Bi 2 Te 4 O 11 fluorite-type anti-glass phase) crystalline phase have been achieved owing to the controlled heat treatment of a 7.14Bi 2 O 3 À7.14Nb 2 O 5 À85.72TeO 2 glass system, which contains chains of corner linked TeO 3 and TeO 4 units with nonbridging oxygens (NBOs) coordinating NbO 6 and BiO 6 units. [16] It could be understood that the presence of chains of corner linked TeO 3 and TeO 4 coordination polyhedral at an equal proportion and the presence of modifier cations surrounded by NBOs in the form of octahedral units lend the formation of tellurium-rich anti-glass phase.…”

Photoluminescence and spectral parameters of Eu3+ in sodium–aluminum–tellurite ceramics

“…Currently, a great deal of research has been focused on RE doped glasses owing to their extensive applications in laser and optical communication devices [9,10]. Conversely, little investigation was carried out on the luminescence properties of RE doped opaque ceramics, because the opacity limited their applications in optical transmission devices.…”