Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1612695 | Journal of Alloys and Compounds | 2014 | 7 Pages |
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.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Duan Li, Wenjie Li, Claudia Fasel, James Shen, Ralf Riedel,