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Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.117  No.1361 (January) (2009)  >  pp.52-55

Journal of the Ceramic Society of Japan
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New anti-fluorite solid-solution phases in Li-Ti-N ternary system

Atsuo YAMADA1), Shunsuke MORI1), Hiromasa IYAMA1), Ryoji KANNO1) and Masatoshi SHIBATA2)
1) Department of Electronic Chemistry, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology
2) Functional Materials Laboratory, Central Research Laboratories, Idemitsu Kosan Co., Ltd.

  New Li-Ti-N solid-solution compounds with an anti-fluorite-type superstructure were synthesized by heating the mixture of Li3N and TiN at 800°C in Ar flow. The compositions of the new compounds seem to lie on the tie-line between the two well-known compounds, Li3N (hexagonal, P6/mmm) and Li5TiN3 (cubic, I21/a-3) by Li evaporation during heating in Ar gas flow, and nominally represented with Li5+yTi1-yN3-y. The solubility is large; the anti-fluorite-type superstructure of Li5TiN3 (y = 0) was retained up to y = ca. 0.9, which is close to the end member Li3N (y = 1) with a different layered structure. This finding opens up further exploring other new Li-M-N (M = transition metals, group XIII, or XIV elements) phases with some attractive functions.

Anti-fluorite, Lithium nitride, Titanium

Received: August 25, 2008
Accepted: November 20, 2008 , Published online: January 01, 2009
Copyright (c) 2009 The Ceramic Society of Japan



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