Sinterability of the oxynitride LaTiO 2 N with perovskite-type structure

Duan Li, Wenjie Li, Claudia Fasel, James Shen, Ralf Riedel

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Based on a thermal stability study, the sinterability of the oxynitride LaTiO 2 N was investigated by spark plasma sintering (SPS). The results show that LaTiO 2 N is thermodynamically unstable above ca. 400 C in air and ca. 800 C in argon. While it appears impossible to completely avoid decomposition during sintering, LaTiO 2 N ceramics with relative density of 74-94% and a residual LaTiO 2 N content of 57-90 wt% were prepared. By manipulating kinetics, a relative density of 94% was achieved at 1350 C under an uniaxially applied pressure of 125 MPa. This density is higher than any other counterparts prepared by conventional sintering so far. SPS appears a feasible tool for manipulating the sintering kinetics. It enables the preparation of almost dense LaTiO 2 N bulks with adequate purity.

Original languageEnglish (US)
Pages (from-to)567-573
Number of pages7
JournalJournal of Alloys and Compounds
Volume586
DOIs
StatePublished - Jan 1 2014

Fingerprint

Perovskite
Sintering
Spark plasma sintering
Kinetics
Argon
Thermodynamic stability
Decomposition
Air
perovskite

All Science Journal Classification (ASJC) codes

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this

Li, Duan ; Li, Wenjie ; Fasel, Claudia ; Shen, James ; Riedel, Ralf. / Sinterability of the oxynitride LaTiO 2 N with perovskite-type structure In: Journal of Alloys and Compounds. 2014 ; Vol. 586. pp. 567-573.
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Sinterability of the oxynitride LaTiO 2 N with perovskite-type structure . / Li, Duan; Li, Wenjie; Fasel, Claudia; Shen, James; Riedel, Ralf.

In: Journal of Alloys and Compounds, Vol. 586, 01.01.2014, p. 567-573.

Research output: Contribution to journalArticle

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T1 - Sinterability of the oxynitride LaTiO 2 N with perovskite-type structure

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AB - Based on a thermal stability study, the sinterability of the oxynitride LaTiO 2 N was investigated by spark plasma sintering (SPS). The results show that LaTiO 2 N is thermodynamically unstable above ca. 400 C in air and ca. 800 C in argon. While it appears impossible to completely avoid decomposition during sintering, LaTiO 2 N ceramics with relative density of 74-94% and a residual LaTiO 2 N content of 57-90 wt% were prepared. By manipulating kinetics, a relative density of 94% was achieved at 1350 C under an uniaxially applied pressure of 125 MPa. This density is higher than any other counterparts prepared by conventional sintering so far. SPS appears a feasible tool for manipulating the sintering kinetics. It enables the preparation of almost dense LaTiO 2 N bulks with adequate purity.

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