论文部分内容阅读
利用溶胶-凝胶法制备尖晶石结构的Ni0.7-yZn0.3CuyFe2O4(y=0,0.1,0.2及0.3)。经微结构以及磁性能的研究发现,铜掺杂使样品在700℃时就形成了完全的尖晶石相,并且当铜掺入量为y=0.1时,样品的晶粒最大,最大值Ms达到66.7(A·m2)/kg。在此基础上,研究Mn掺杂对制备的样品(Ni0.6Zn0.3Cu0.1)1-xMnxFe2O4(x=0,0.01,0.02,0.03)的磁性能以及微观结构的影响。结果发现,铁氧体粉体的Ms随着Mn的增加基本保持不变;而环状样品的Bs,Br和Hc与锰含量以及烧结温度有着明显的变化关系,Bs和Br随着锰含量的增大先减小后增大,最小值分别达到Bs=305mT,Br=242mT。而矫顽力随锰含量的增大而增大。另外,Br与Bs都随着烧结温度的增大而增加,Hc减小。当烧结温度达到1050℃时,Hc,Bs和Br都趋于一个恒定的值。
The spinel Ni0.7-yZn0.3CuyFe2O4 (y = 0, 0.1, 0.2 and 0.3) was prepared by sol-gel method. The microstructure and magnetic properties of the study found that copper doping makes the sample at 700 ℃ to form a complete spinel phase, and when the amount of copper y = 0.1, the sample maximum grain size, the maximum Ms Reached 66.7 (A · m2) / kg. On this basis, the influence of Mn doping on the magnetic properties and microstructure of the prepared samples (Ni0.6Zn0.3Cu0.1) 1-xMnxFe2O4 (x = 0,0.01,0.02,0.03) was studied. The results showed that the Ms of ferrite powder remained unchanged with the increase of Mn, while the Bs, Br and Hc of ring samples had a significant change with the content of manganese and the sintering temperature. With the increase of Mn content Increase first decreases then increases, the minimum reached Bs = 305mT, Br = 242mT. The coercivity increased with the increase of manganese content. In addition, both Br and Bs increase as the sintering temperature increases, and Hc decreases. When the sintering temperature reaches 1050 ℃, Hc, Bs and Br tend to a constant value.