ilica incorporation into sodium aluminum phosphate glasses: Structural characterization by Raman spectroscopy and multinuclear solid-state NM

Autor(es)

Logrado, Millena ^[1] ; Eckert, Hellmut ^{[1, 2]} ; Ikeda, Hikaru ^[3] ; Nakane, Shingo ^[3] ; Yamazaki, Hiroki ^[3]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Fis Sao Carlos, CP 369, BR-13566590 Sao Carlos, SP - Brazil

^[2] Westfalische Wilhelms Univ Munster, Inst Phys Chem, Corrensstr 30, D-48149 Munster - Germany

^[3] Nippon Elect Glass Co Ltd, 7-1 Seiran 2 Chome, Otsu, Shiga 5208639 - Japan

• Tipo de documento: Artigo Científico
• Fonte: Journal of Non-Crystalline Solids; v. 579, MAR 1 2022.
• Citações Web of Science: 0

Resumo

Optical fiber glasses in the system (59-xP(2)O(5))-xSiO(2)-13Al(2)O(3)-28Na(2)O show non-linear trends in the glasstransition temperatures, thermal expansion coefficients, and weathering stabilities. The structural origins have been studied using solid-state NMR and Raman spectmscopies on a series of bulk glasses with 0 <= x <= 13. Two types of P-2 units - those dominantly interacting with Na+ and those interacting more strongly with Al can be differentiated by P-31[Na-23] and P-31[Al-27] double resonance experiments. Silicon is four-coordinated, fully polymerized, and engaged in Si-O-P linkages. Trends in the Si-29 chemical shifts and the P-31-P-31 dipolar interaction strengths are related to the Si-O-P, Si-O-Al, and P-O-P connectivity distributions, providing a rationale for changes in macroscopic properties. (AU)

• Processo FAPESP: 13/07793-6 - CEPIV - Centro de Ensino, Pesquisa e Inovação em Vidros
• Beneficiário: Edgar Dutra Zanotto
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs