Pei Wenli, Zhao Dong, Wu Chun, Wang Xiaoyang, Wang Kai, Wang Jianjun, Wang Qiang
Key Laboratory of Anisotropy and Texture of Materials (Ministry of Education), Northeastern University Shenyang 110819 People's Republic of China
School of Materials Science and Engineering, Liaoning Technical University Fuxin 123000 People's Republic of China
RSC Adv. 2019 Nov 5;9(62):36034-36039. doi: 10.1039/c9ra06966f. eCollection 2019 Nov 4.
A liquid-assisted one-step sintering method was proposed for the synthesis of L1-FePt superfine nanoparticles. The liquid assisted Fe and Pt precursors were homogeneously deposited on NaCl media, which facilitated the nucleation rates, obviously reduced the particle size and promoted the orderly transformation. Through optimizing the sintering parameters, superfine L1-FePt nanoparticles (about 7 nm, TEM) with coercivity as high as 2.29 T were obtained. This research highlights the feasibility of synthesizing L1-FePt nanoparticles with superfine sizes and ultra-high coercivity.
提出了一种用于合成L1-FePt超细纳米颗粒的液相辅助一步烧结法。液相辅助的Fe和Pt前驱体均匀沉积在NaCl介质上，这促进了成核速率，显著减小了粒径并促进了有序转变。通过优化烧结参数，获得了矫顽力高达2.29 T的超细L1-FePt纳米颗粒（TEM下约7 nm）。本研究突出了合成具有超细尺寸和超高矫顽力的L1-FePt纳米颗粒的可行性。
