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Synthesis of Europium Sulfides by CS2 Sulfurization and Heat Treatment

Published online by Cambridge University Press:  16 May 2016

Liang Li ,
Shinji Hirai ,
Eiji Nakamura  and
Haibin Yuan
Liang Li
Affiliation:
Department of Materials Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
Shinji Hirai*
Affiliation:
Department of Materials Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
Eiji Nakamura
Affiliation:
Department of Materials Science and Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
Haibin Yuan
Affiliation:
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo 454000, China
*
*Corresponding author. E-mail: hirai@mmm.muroran-it.ac.jp
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Abstract

The formation of europium sulfides (Eu3S4 and EuS) via CS2 gas sulfurization of Eu2O3 powder was investigated. Single-phase Eu3S4 was obtained via CS2 gas sulfurization of Eu2O3 at 773 K for periods longer than 0.5 hr and EuS was generated by sulfurization at 1073 K for 8 hr. The higher sulfurization temperature and shorter sulfurization time accelerated the formation of high purity EuS. Synthetic pure Eu3S4 was treated under vacuum, rich-sulfur atmosphere and inert atmosphere, respectively. EuS was obtained when heat treatment was performed at 873 K under vacuum, at 973 K under CS2/Ar atmosphere, and at 1073 K under Ar atmosphere. Heat treatment of Eu3S4 generated a small amount of Eu2O2S due to impurity oxygen. Formation of Eu2O2S could be inhibited by heat treatment under CS2/Ar atmosphere.

Keywords

Eumicrostructurephase transformation
Type
Articles
Information
MRS Advances , Volume 1 , Issue 60: Energy and Sustainability , 2016 , pp. 3983 - 3988
Copyright
Copyright © Materials Research Society 2016 

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References

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