不同表面活性剂对CoSb_3纳米粉体的影响及其非晶化研究

分别选用不同的表面活性剂(SDBS、CTAB、EDTA、PVP),采用水热法成功制备CoSb_3纳米粉体.对制备的纳米粉体分别进行XRD和SEM表征,研究了不同表面活性剂对制备的CoSb_3纳米粉体的影响.结果表明不同表面活性剂对制备的CoSb_3纳米粉体形貌有显著的影响.并将水热法制备的CoSb_3纳米粉体,采用脉冲激光非晶化技术进行处理,结果表明纳米粉体实现了部分非晶化.通过样品的XRD分析研究了影响CoSb_3纳米粉体部分非晶化的条件,结果表明扫描重复次数的增加可以提高CoSb_3基方钴矿热电材料的非晶化能力,适当提高扫描速度有利于CoSb_3基方钴矿热电材料的非晶化.

Effects of Surfactants on the CoSb_3 Nanopodwers and Amorphization of the Synthesized Nanopodwers

The CoSb_3 nanopodwers were synthesized by the hydrothermal method using different surfactants which were Cetyltrimethyl Ammonium Bromide(CTAB),Ethylene Diamine Tetraacetic Acid(EDTA),sodium dodecyl benzene sulfonate(SDBS) and Polyvinyl Pyrrolidone(PVP). The phase structure and micro-topography of the nanopowders were investigated by X-ray diffractometer(XRD) and a fileld-emission scanning electron microscopy(FESEM).The result showed that different surfactants had significant influence on the morphologies of CoSb_3 nanopodwers. Laser rapid quenching method was used to deal with CoSb_3 nanopowders that synthesized by the hydrothermal method in order to achieve partial amorphization of the CoSb_3.The amorphous conditions of CoSb_3 were investigated by the XRD. The results showed that(1) with the increase of the scanning number,the amorphous level of CoSb_3 raised;(2) Increasing the scanning speed properly could be helpful to increase the amorphous level of CoSb_3.