Sinterability of the oxynitride LaTiO2N with perovskite-type structure
2014 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, Vol. 586, 567-573 p.Article in journal (Refereed) Published
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 degrees C in air and ca. 800 degrees 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 degrees 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.
Place, publisher, year, edition, pages
2014. Vol. 586, 567-573 p.
Spark plasma sintering, Perovskite-type oxynitride, Sinterability, Thermal analysis, Kinetics, X-ray diffraction
IdentifiersURN: urn:nbn:se:su:diva-100641DOI: 10.1016/j.jallcom.2013.10.071ISI: 000329856800090OAI: oai:DiVA.org:su-100641DiVA: diva2:696606
FunderEU, FP7, Seventh Framework Programme, 2010-264873