摘要：
本发明公开了一种具有成分梯度的一维NixFe3-xO4磁性纳米线的制备方法：按FeBr3、NiI2物质的量之比为2：1，将FeBr3粉末、NiI2粉末分别放入管式炉的第一加热区，基体放入第二加热区，FeBr3粉末放置于NiI2粉末和基体的中间，FeBr3粉末和NiI2粉末之间的距离为6～9cm，调节管式炉第一加热区的温度为750～900℃，第二加热区的温度为850～1000℃，并向管式炉内通入载气，保温2～3h，然后将管式炉冷却至室温，将基体取出，即制得具有成分梯度的一维NixFe3-xO4纳米线，x=0.05-0.2。本发明将温度控制与基体和源物质的距离相结合下，成功制备了大面积的可控成分梯度变化的一维NixFe3-xO4纳米线。
摘要（英）：
The invention discloses a preparing method of a one-dimensional NiFe<3-x>O4 magnetic nano wire with a component gradient. The preparing method includes: separately putting FeBr3 powder and NiI2 powder into a first heating zone of a tube furnace according to a mole ratio of 2:1, putting a substrate into a second heating zone with the FeBr3 powder being put between the NiI2 powder and the substrate and the distance between the FeBr3 powder and the NiI2 powder being 6-9 cm, adjusting the temperature of the first heating zone of the tube furnace to be 750-900 DEG C and the temperature of the second heating zone to be 850-1000 DEG C, feeding a carrier gas into the tube furnace, maintaining the temperature for 2-3 h, cooling the tube furnace to the room temperature and taking the substrate out, thus obtaining the one-dimensional NiFe<3-x>O4 magnetic nano wire with the component gradient with the x being 0.05-0.2. According to the preparing method, the one-dimensional NiFe<3-x>O4 magnetic nano wire with the component gradient and a large area is prepared under combination of temperature control and the distance between the substrate and a source substance.
