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以硝酸锶、硝酸铁、硝酸钐、硝酸钴为原料,采用低热固相法制备出前驱体,经灼烧后得到最终产物,使用XRD、EDX、SEM对其表征,表明产物为Sm-Co共掺杂的Sr1-xSmxCoxFe12-xO19(x=0~0.5)锶铁氧体;并发现所制产物具有单一的六方相晶体结构,粒子尺寸在40~100 nm,随着Sm-Co掺杂量的增大,晶粒尺寸逐渐减小。经VSM测试:产物的磁性能(Ms,Mr,Hc)随Sm-Co的共掺杂量的增加(0~0.5),先增大后减小,在x=0.1时表现为最大值(Ms=64.32 A·m2·kg-1、Mr=36.17 A·m2·kg-1、Hc=417.45 k A·m-1)。将制得的共掺杂锶铁氧体磁粉,添加到醇酸清漆中形成防蜡涂层,通过拉伸强度测试、涂层防蜡率实验、以及晶相显微表征,发现该涂层随磁粉用量增加,抗拉强度提高;同时随磁粉磁性的增强,涂层的防蜡效果增加,在磁粉用量为2%时,涂层磁性最大,防蜡率也达到最大值77.3%。
The precursors were prepared by low-temperature solid-state reaction with strontium nitrate, ferric nitrate, samarium nitrate and cobalt nitrate as raw materials. The precursors were obtained by calcination. The products were characterized by XRD, EDX and SEM. The results showed that the products were Sm-Co Doped Sr1-xSmxCoxFe12-xO19 (x = 0-0.5) strontium ferrite; and found that the product has a single hexagonal phase crystal structure, the particle size of 40 ~ 100 nm, with the Sm-Co doping amount Increase, the grain size decreases gradually. The results of VSM showed that the magnetic properties (Ms, Mr, Hc) of the product first increased and then decreased with the increase of co-doping amount of Sm-Co (0 ~ 0.5) = 64.32 A · m 2 · kg -1, Mr = 36.17 A · m 2 · kg -1, Hc = 417.45 k A · m -1). The obtained co-doped strontium ferrite magnetic powder, added to the alkyd varnish to form a wax coating, by the tensile strength test, the coating wax test, and the crystal phase microscopic characterization and found that the coating with With the increase of the amount of magnetic powder, the tensile strength is increased. At the same time, the anti-wax effect of the coating increases with the increase of the magnetic properties of the magnetic powder. When the amount of the magnetic powder is 2%, the coating has the maximum magnetic susceptibility and the anti-wax rate reaches the maximum of 77.3%.