Towards the investigation of ternary compound in the Ti-Al-Zr-O system: Effect of oxygen fugacity on phase formation

T. B. Bekker, K. D. Litasov, A. F. Shatskiy, N. E. Sagatov, P. G. Krinitsin, S. P. Krasheninnikov, I. V. Podborodnikov, S. V. Rashchenko, A. V. Davydov, H. Ohfuji

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The Ti-Al-Zr-O system has received significant attention as it hosts a variety of phases of industrial interest. In this paper, new experiments on the Ti-Al-Zr-O system aimed at clarifying phase formation depending on the redox conditions with special attention to the formation of ternary compounds and their results have been reported. For the first time a monophase AlTi2O5 sample with a ratio of titanium oxides TiO2:Ti2O3 = 2:1 was obtained and characterized. Single-crystal X-ray diffraction analysis of β-(ZrxTi1-x)2O4 crystals was carried out. The synthesis of the ternary Ti-Al-Zr compound was performed in an evacuated quartz ampoule and accompanied by the extraction of silicon from the ampoule. The compound has pyrochlore-type cubic structure A2 4+B2 3+O7 (Fd-3m) and the composition close to (Ti4+ 1,47(2)Zr0.41(2)Si0.12(1))2(Al1.15(4)Ti3+ 0.85(4))2O7. We believe that our study is a starting point for future research as it provides first experimental data on the ternary compound in the Ti-Al-Zr-O system.

Original languageEnglish
Pages (from-to)3663-3672
Number of pages10
JournalJournal of the European Ceramic Society
Volume40
Issue number10
DOIs
Publication statusPublished - Aug 2020

Keywords

  • Aluminum
  • Ceramics
  • Synthesis
  • Titanium
  • Zirconium
  • THERMAL-STABILITY
  • THERMODYNAMIC DESCRIPTION
  • CRYSTAL-STRUCTURE
  • COMPOSITES
  • ALUMINUM TITANATE
  • TRANSITION
  • TITANIUM OXIDE
  • DIFFRACTION
  • MICROWAVE DIELECTRIC-PROPERTIES
  • MICROSTRUCTURE

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