University of Hertfordshire

From the same journal

By the same authors

  • Fabiana D' Isanto
  • Federico Smeacetto
  • Hans-Peter Martin
  • Richard Sedlak
  • Maksym Lisnichuk
  • Andreas Chrysanthou
  • Milena Salvo
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Original languageEnglish
Number of pages10
JournalCeramics International
Early online date3 Apr 2021
DOIs
Publication statusE-pub ahead of print - 3 Apr 2021

Abstract

A silica-based glass-ceramic, with Y2Ti2O7 as the major crystalline phase, is designed, characterised and tested as an oxidation-protective coating for a titanium suboxide (TiOx) thermoelectric material at temperatures of up to 600 °C. The optimised sinter-crystallisation treatment temperatures are found to be 1300 °C and 855 °C for a duration of 30 min, and this treatment leads to a glass-ceramic with cubic Y2Ti2O7 and CaAl2Si2O8 as crystalline phases. An increase of ~270 °C in the dilatometric softening temperature is observed after devitrification of the parent glass, thus further extending its working temperature range.
Excellent adhesion of the glass-ceramic coating to the thermoelectric material is maintained after exposure to a temperature of 600 °C for 120 h under oxidising conditions, thus confirming the effectiveness of the T1 glass-ceramic in protecting the TiOx material.


Notes

© 2021 Elsevier Ltd and Techna Group S.r.l. All rights reserved. This is the accepted manuscript version of an article which has been published in final form at https://doi.org/10.1016/j.ceramint.2021.03.316

ID: 24968191