文摘
A novel 1.54 μm laser absorbent of Er2O2S was prepared by solid state flux method. The effects of different calcining temperatures and preservation time on the synthesis and reflecting property of Er2O2S were investigated. The mechanism of fluxing agent was assumed and proved. The phase composition, morphology, and reflectivity of the powders were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and ultraviolet visible spectrophotometer (UV-3600PC). The results showed that pure phase of Er2O2S could be obtained with Na2CO3 as fluxing agent at 800–1200 °C, too high temperature and too long preservation time were bad for synthesizing Er2O2S. Na2CO3 played an important role during the reaction, the elemental sulfur in Er2O2S came from Na2S2O3 indeed. Different calcination conditions had a great impact on particle morphology, which had influence on the reflectivity of the products. The reflectivity was the lowest (0.39 %) when the calcining temperature was 1200 °C.