【摘要】 本文以七水合硫酸亚钴 (CoSO4·7H2 O)和无水亚硫酸钠 (Na2 SO3 )为原料 ,以水合肼 (N2 H4·H2 O)为还原剂 ,利用水热法合成了立方晶系的六角片状Co9S8单晶。运用X射线衍射 (XRD)、透射电子显微镜 (TEM)和振动样品磁强计(VSM)对产物进行了表征。结果表明 ,产物主要由直径为 0 .8～ 1.5 μm六角片状Co9S8单晶组成 ,合成单晶的温度为180℃ ,时间为 72h。在室温下 ,产物的饱和磁化率 (Ms)和矫顽力 (Hc)分别为 6 5emu/g和 333Oe。更多还原

【Abstract】 Hexagonal Co₉S₈ single crystal flake was synthesized in hydrazine hydrate （N₂H₄·H₂O） solvent at 180℃ for 72h by hydrothermal method using cobalt sulfate hydrate （CoSO₄·7H₂O） and anhydrous sodium sulfate （Na₂SO₃） as the starting materials. The as-prepared Co₉S₈ samples were characterized by X-ray powder diffraction （XRD）,transmission electron microscope （TEM）and vibrating sample magnetometer （VSM）. The results show that the samples are mainly composed of hexagonal Co₉S₈ single crystal flakes with diameters of 0.8-1.5μm.The suitable reaction temperature and reaction time for growing Co₉S₈ single crystals is 180℃and 72h respectively.The saturation magnetization （M_s） and coercivity （H_c） values of the sample are 65 emu /g and 333 Oe under the room temperature respectively.更多还原