Synthesis of BaZrS3 in the presence of excess sulfur

Synthetic reaction of barium zirconium sulfide, BaZrS3, was studied in a large excess amount of sulfur melt at temperatures of 623–723 K and in the presence of a small amount of excess sulfur at temperatures of 623–823 K, respectively. The results showed that BaZrS3 was formed with high yields by heating at temperatures ranging from 723 to 873 K, if a proper amount of excess sulfur and 10 mole% of BaCl2 were added in the starting materials. The compound could be obtained in almost a single phase with only 2–3 mole% ZrO2 impurity after the 8 min water treatment of the products obtained at 873 K. The modified method studied in this paper, i.e. reaction in the medium temperature range of 723–873 K, was shown to be applicable for synthesizing the mixed sulfides of some kinds including BaZrS3.