Liquid metal Ga-Sn alloy based ferrofluids with amorphous nano-sized Fe-Co-B magnetic particles
Liquid metal Ga-Sn alloy based ferrofluids with amorphous nano-sized Fe-Co-B magnetic particles
复制标题
具有非晶纳米尺寸 Fe-Co-B 磁性颗粒的液态金属 Ga-Sn 合金基铁磁流体
DOI：
10.1007/s10853-020-04908-9
复制
发表时间：
2020-06-22
影响因子：
4.5
通讯作者：
Bian, Xiufang
中科院分区：
文献类型：
--
作者：
Yang, Chuncheng;Liu, Zhong;Bian, Xiufang
制备了非晶态Fe-Co-B纳米磁性颗粒，并首次将其引入Ga91.6Sn8.4合金中制备液态金属基铁磁流体。 Fe-Co-B 颗粒为无定形球形，平均粒径为 10.6 nm。经550℃退火处理后的非晶Fe-Co-B纳米颗粒的饱和磁化强度为81emu/g，高于未经450℃退火处理和经过450℃退火处理后的Fe-Co-B纳米颗粒的饱和磁化强度。具有非晶 Fe-Co-B 纳米颗粒的退火 Ga91.6Sn8.4 合金基铁磁流体表现出高稳定性，具有超顺磁性，饱和磁化强度为 2.57 emu/g。此外，Ga91.6Sn8.4合金基铁磁流体表现出温敏磁性能。磁粘特性表明退火后的Ga91.6Sn8.4合金基铁磁流体表现出较强的磁响应性。粘性-磁场磁滞曲线表明退火后的Ga91.6Sn8.4合金基铁磁流体具有优异的可逆性并表现出良好的高温性能。
Amorphous Fe-Co-B nano-sized magnetic particles were prepared and firstly introduced into Ga91.6Sn8.4alloy to fabricate liquid metal-based ferrofluids. The Fe-Co-B particles are amorphous and spherical with an average particle size of 10.6 nm. The saturation magnetization of amorphous Fe-Co-B nanoparticles after annealing treatment at 550 °C is 81 emu/g, which is higher than that of Fe-Co-B nanoparticles without and after annealing treatment at 450 °C. The annealed Ga91.6Sn8.4alloy-based ferrofluids with amorphous Fe-Co-B nanoparticles exhibit high stability, which is superparamagnetic with a saturation magnetization of 2.57 emu/g. Besides, the Ga91.6Sn8.4alloy-based ferrofluids show temperature-sensitive magnetic property. The magnetoviscous property demonstrates that the annealed Ga91.6Sn8.4alloy-based ferrofluids show relatively strong magnetic responsiveness. The hysteresis curves of viscosity–magnetic field show the annealed Ga91.6Sn8.4alloy-based ferrofluids have superior reversibility and exhibit a desirable high-temperature performance.