高等学校化学学报 ›› 2000, Vol. 21 ›› Issue (S1): 272.
• Chemistry in Materials Sciences • 上一篇 下一篇
ZENG Hui-Yi, MAO Jiang-Gao, CHEN Jiu-Tong, DONG Zhen-Chao. GUO Guo-Cong, HUANG Jin-Shun
ZENG Hui-Yi, MAO Jiang-Gao, CHEN Jiu-Tong, DONG Zhen-Chao. GUO Guo-Cong, HUANG Jin-Shun
摘要:
Research on rare earth chalcogenides has been an active.area of solid state chemistry due to their rich structural chemistry and various interesting physical properties[1-3]. In our attempts to search for potential infrared ceramic materials in the rare-earth-transition-metal chalcogenide system, two new quaternary selenides, KHo2CuSe4 and KEr2CuSe4, were obtained by a two-step synthetic route. Precursors from the first-step solid state reaction were mixed with excess amount of the KCl flux. The pressed pellet was placed into a sealed silica ampoule and thermally equilibrated at 930℃ for 8 days prior to slow cooling to room temperature. Red,transparent, and columnar single crystals of these two phases were isolated from the flux by a suction filtration technique with the products washed with distilled water. The incidental incorporation of the flux cation leads to the formation of the new phases.
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