多元醇还原制备纳米Co粉及其磁性的研究(英文)

Preparation of nanometer cobalt particles by polyol reduction process and their magnetic characterizations

采用二价钴盐为前驱物,1,2-丙二醇为还原剂,用液相还原法制备了晶粒尺寸约为10～13nm、具有面心立方(β相)结构的纯度高、粒度均匀的纳米钴粉,运用XRD、TEM等分析方法对制备的纳米钴粉进行物相和结构形貌的表征,初步研究了多元醇法还原Co纳米粉的反应机理.采用VSM对纳米钴粉进行磁学性能的表征.结果表明,所制备的纳米Co粉在室温下具有铁磁性,并且矫顽力不高(6.282×103A/m).

By the polyol reduction process, the nanometer spherical cobalt particles with fcc structure and a crystal size of 10-13 nm, are prepared using the reagents of cobaltous salt as precursor and 1,2-propanediol as reducing agent. XRD, TEM are applied to characterize the phase and morphology of the as-prepared products. The magnetic characterizations of the nanometer β-Co particles are studied by VSM. They are ferromagnetic at room temperature but with small coercivity (6.282 × 103 A/m).