Sinterability of the oxynitride LaTiO2N with perovskite-type structure

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

doi:10.1016/j.jallcom.2013.10.071

Sinterability of the oxynitride LaTiO₂N with perovskite-type structure

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

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Based on a thermal stability study, the sinterability of the oxynitride LaTiO₂N was investigated by spark plasma sintering (SPS). The results show that LaTiO₂N 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, LaTiO₂N ceramics with relative density of 74-94% and a residual LaTiO₂N 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 LaTiO₂N bulks with adequate purity.

Original language	English (US)
Pages (from-to)	567-573
Number of pages	7
Journal	Journal of Alloys and Compounds
Volume	586
DOIs	https://doi.org/10.1016/j.jallcom.2013.10.071
State	Published - 2014

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2013.10.071

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@article{7db4b5cb1d03426d96e54c8b7ed6cd61,

title = "Sinterability of the oxynitride LaTiO2N with perovskite-type structure",

abstract = "Based on a thermal stability study, the sinterability of the oxynitride LaTiO2N was investigated by spark plasma sintering (SPS). The results show that LaTiO2N 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, LaTiO2N ceramics with relative density of 74-94\% and a residual LaTiO2N 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 LaTiO2N bulks with adequate purity.",

author = "Duan Li and Wenjie Li and Claudia Fasel and James Shen and Ralf Riedel",

note = "Funding Information: We thank Prof. Derek Thompson and Dr. Jutharat Ahchawarattaworn at Newcastle University in UK for preparing and providing LaTiO 2 N powder. This work was supported by European Commission through the Marie-Curie ITN project “FUnctional Nitrides for Energy Applications, FUNEA” (FP7-PITN-GA-2010-264873).",

year = "2014",

doi = "10.1016/j.jallcom.2013.10.071",

language = "English (US)",

volume = "586",

pages = "567--573",

journal = "Journal of Alloys and Compounds",

issn = "0925-8388",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Sinterability of the oxynitride LaTiO2N with perovskite-type structure

AU - Li, Duan

AU - Li, Wenjie

AU - Fasel, Claudia

AU - Shen, James

AU - Riedel, Ralf

N1 - Funding Information: We thank Prof. Derek Thompson and Dr. Jutharat Ahchawarattaworn at Newcastle University in UK for preparing and providing LaTiO 2 N powder. This work was supported by European Commission through the Marie-Curie ITN project “FUnctional Nitrides for Energy Applications, FUNEA” (FP7-PITN-GA-2010-264873).

PY - 2014

Y1 - 2014

N2 - Based on a thermal stability study, the sinterability of the oxynitride LaTiO2N was investigated by spark plasma sintering (SPS). The results show that LaTiO2N 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, LaTiO2N ceramics with relative density of 74-94% and a residual LaTiO2N 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 LaTiO2N bulks with adequate purity.

AB - Based on a thermal stability study, the sinterability of the oxynitride LaTiO2N was investigated by spark plasma sintering (SPS). The results show that LaTiO2N 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, LaTiO2N ceramics with relative density of 74-94% and a residual LaTiO2N 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 LaTiO2N bulks with adequate purity.

UR - https://www.scopus.com/pages/publications/84887267291

UR - https://www.scopus.com/pages/publications/84887267291#tab=citedBy

U2 - 10.1016/j.jallcom.2013.10.071

DO - 10.1016/j.jallcom.2013.10.071

M3 - Article

AN - SCOPUS:84887267291

SN - 0925-8388

VL - 586

SP - 567

EP - 573

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Sinterability of the oxynitride LaTiO₂N with perovskite-type structure

Abstract

All Science Journal Classification (ASJC) codes

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