Exploring the Influence of ZnF₂ on Zinc-Tellurite Glass: Unveiling Changes in OH Content, Structure, and Optical Properties

Autor(es)

Capelo, Renato Grigolon ; Baltieri, Ricardo Santos ; de Oliveira Jr, Marcos ; Manzani, Danilo

• Tipo de documento: Artigo Científico
• Fonte: ACS OMEGA; v. 8, n. 38, p. 9-pg., 2023-09-13.

Resumo

Tellurite glasses have garnered considerable interest as optical host materials due to their advantageous properties, including low processing temperature, high resistance to corrosion and crystallization, and excellent solubility for rare earth ions. However, their applicability in the infrared (IR) region is limited by the absorption of species with distinct vibrations. The incorporation of fluorides has emerged as a promising approach to reduce hydroxyl (OH) absorption during the precursor melting process. In this study, we investigated the influence of ZnF2 on a glass matrix composed of TeO2-ZnO-Na2O, resulting in notable changes in the glass structure and optical properties, with Eu3+ serving as an environmental optical probe. The samples underwent comprehensive structural, thermal, and optical characterization. Structural analyses encompassed F-19 and Te-125 nuclear magnetic resonance (NMR), with the latter being complemented by mathematical simulations, and these findings were consistent with observations from Raman scattering. The main findings indicate an enhancement in thermal stability, modifications in the Te-O connectivity, and a reduction in emission intensity attributed to the effects of ligand polarizability and symmetry changes around Eu3+. Additionally, the fluorotellurite matrices exhibited a shift in the absorption edge toward higher energies, accompanied by a decrease in mid-IR absorptions, thereby expanding the transparency window. As a result, these glass matrices hold substantial potential for applications across various regions of the electromagnetic spectrum, including optical fiber drawing and the development of solid-state emitting materials. (AU)

• Processo FAPESP: 20/12280-1 - Guias de ondas à base de vidros óxidos de metais pesados para sensoriamento óptico de gases na região do UV-Vis
• Beneficiário: Renato Grigolon Capelo
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 21/08111-2 - Materiais conversores de luz à base de terras raras: marcadores luminescentes, sensores e amplificadores ópticos
• Beneficiário: Hermi Felinto de Brito
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 20/11038-2 - Materiais vítreos multifuncionais à base de óxidos de metais pesados e oxifluoretos dopados com terras raras para aplicação em fotônica
• Beneficiário: Ricardo Santos Baltieri
• Modalidade de apoio: Bolsas no Brasil - Doutorado