New Solid Solutions of Ca3 – 1.5xEr x0.5xB2SiO8: Synthesis, Phase Transition under the Influence of Isomorphic Substitutions and Temperature, Thermal Expansion, and Luminescent Properties of Polymorphs

V. A. Yukhno, A. V. Povolotskii, M. G. Krzhizhanovskaya, I. E. Kolesnikov, R. S. Bubnova

Research output: Contribution to journalArticlepeer-review

Abstract

Abstract: A number of new solid solutions Ca3 − 1.5xErx0.5xB2SiO8 (x = 0–0.4) based on borosilicate Ca3B2SiO8 are synthesized: homogeneous solid solutions with х = 0–0.125 are structurally similar to the low-temperature monoclinic polymorphic modification of β-Сa3B2SiO8; and at 0.16 < х < 0.25, to the high-temperature orthorhombic polymorph α-Сa3B2SiO8. High-temperature X-ray powder diffraction and high-temperature Raman spectroscopy (20–1000°C) are used to study the monoclinic-orthorhombic transition of solid solutions through the two-phase region (0.125 < х <0.16), thermal expansion of monoclinic and orthorhombic solid solutions (x = 0.1, 0.15), and their decomposition with the formation of silicate Ca2Er8(SiO4)6O2 above 990°C. According to the data of the optical spectroscopy, it is found that the intensity of the photoluminescence of erbium ions is significantly lower than the intrinsic luminescence of the borosilicate matrix in the entire studied range of concentrations of active ions.

Original languageEnglish
Pages (from-to)415-423
Number of pages9
JournalGlass Physics and Chemistry
Volume46
Issue number5
DOIs
StatePublished - 1 Sep 2020

Scopus subject areas

  • Ceramics and Composites
  • Condensed Matter Physics
  • Materials Chemistry

Keywords

  • borosilicates
  • erbium
  • luminescence
  • solid solutions
  • thermal expansion

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