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Stabilization of lanthanum sulfides with different dopants

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Abstract

By introducing different dopants into the lattice, lanthanum sulfides with higher stability were prepared via the sulfurization of lanthanum oxides using CS2 gas at 1 000 °C. The sulfurizing time of 8 hours was optimized for La/Ca=2 at 1 000 °C and its sulfurization mechanism to form CaLa2S4 was via the reaction of β-La2S3 with CaS. As the increase of the La/Ca and La/Na ratio, longer sulfurizing time was required to get cubic phase. The investigation indicates that Na+ ions were more effective to stabilize cubic structure comparing with Ca2+ ions.

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Authors and Affiliations

  1. School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an, 710072, China

    Peisen Li  (李培森), Huanyong Li & Wanqi Jie

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  1. Peisen Li  (李培森)
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  2. Huanyong Li
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  3. Wanqi Jie
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Correspondence to Peisen Li  (李培森).

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Funded by the National High-Tech Research and Development Program of China (863 Program) (No.2009AA03Z431)

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Li, P., Li, H. & Jie, W. Stabilization of lanthanum sulfides with different dopants. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 27, 529–533 (2012). https://doi.org/10.1007/s11595-012-0498-z

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  • DOI: https://doi.org/10.1007/s11595-012-0498-z

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