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以简单金属前躯体为原料通过快速热解法制备炭包覆纳米金属磁性颗粒,通过透射电镜、X-射线衍射、热重-示差扫描同步热分析及振动样品磁强计等对产物形貌、结构、成分与磁性能进行表征。结果表明:采用该方法制备的炭包覆纳米金属磁性颗粒形状为近球形颗粒,粒径均一,其中炭包覆镍纳米磁性颗粒的粒径集中在10nm～30nm范围,炭包覆铁纳米磁性颗粒粒径则在50nm～60nm范围;所制炭包覆纳米金属磁性颗粒在室温下具有顺磁性,其磁性能随金属颗粒含量的变化而改变。该方法有望发展成一种工艺简单,可进行连续工业化生产炭包覆纳米金属磁性颗粒的方法。
The carbon-coated nano-metal magnetic particles were prepared by rapid pyrolysis from simple metal precursors. The morphology and morphology of the particles were characterized by transmission electron microscopy, X-ray diffraction, simultaneous thermogravimetric-differential scanning differential thermal analysis and vibrating sample magnetometer. Structure, composition and magnetic properties were characterized. The results show that the carbon-coated nano-metal magnetic particles prepared by the method are nearly spherical in shape and uniform in particle size. The diameter of the carbon coated nickel nano-magnetic particles is in the range of 10 nm to 30 nm. The carbon coated iron nano-magnetic particles The particle size is in the range of 50nm-60nm; the prepared carbon coated nano-metal magnetic particles have paramagnetic properties at room temperature, and the magnetic properties thereof change as the content of the metal particles changes. The method is expected to develop into a simple process, continuous industrialized production of carbon-coated nano-metal magnetic particles.