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Type: Artigo de periódico
Title: Titanium environment in TiO2-BaO-ZnO-B2O3 glasses by x-ray absorption spectroscopy
Author: Watanabe, N
Ramos, AY
Alves, MCM
Tolentino, H
Alves, OL
Barbosa, LC
Abstract: The local environment of titanium in glasses of the system TiO2-BaO-ZnO-B2O3 was studied by x-ray absorption spectroscopy. In all glasses, for TiO2 content varying from 35 to 49 mol%, the titanium atoms are mainly fourfold coordinated network formers. For the glass with the highest titanium content, about 20% of the titanium enters into a sixfold environment, indicating the presence of precrystalline nuclei. These nuclei are responsible for the decrease of the optical performance of the glass above threshold titanium content, prior to any observable crystallization.
Country: EUA
Editor: Materials Research Society
Citation: Journal Of Materials Research. Materials Research Society, v. 15, n. 3, n. 793, n. 797, 2000.
Rights: embargo
Identifier DOI: 10.1557/JMR.2000.0113
Date Issue: 2000
Appears in Collections:Unicamp - Artigos e Outros Documentos

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