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Structural, optical and thermal properties of glass and anti-glass phases in strontium tellurite and borotellurite systems doped with europium

Abstract: Glass sample of the composition: 10SrO-90TeO2 was prepared by melt-quenching technique and found to contain triangular, rectangular, and spherical shaped micro-inclusions of the average size ?803??m in the glassy matrix. The inclusions grow to an average size of ?1347??m and assume flower-like morphology upon adding 1?mol% Eu2O3 in the 10SrO-90TeO2 sample. X-ray diffraction studies showed that the micro-inclusions exhibit sharp peaks, but their Raman spectra have broad phonon bands that are indistinguishable or very similar to that of the glassy matrix phase. The addition of 10?mol% B2O3 in the samples inhibits the growth of inclusions of anti-glass phases and forms purely amorphous samples. B2O3 significantly enhances the photoluminescence properties of Eu3+ doped samples. Furthermore, B2O3 converts the four-fold co-ordinated Te-O structural units into three-fold co-ordinated Te-O units.

 Autoría: Kaur R., Khanna A., González-Barriuso M., González F., Chen B.,

 Fuente: Materials Research Bulletin, 2018, 106, 288-295

Editorial: Elsevier

 Fecha de publicación: 01/10/2018

Nº de páginas: 8

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.materresbull.2018.06.020

ISSN: 0025-5408

Url de la publicación: https://doi.org/10.1016/j.materresbull.2018.06.020

Autores/as

KAUR, RAJINDER

KHANNA, ATUL

FERNANDO GONZALEZ MARTINEZ

CHEN, BANGHAO