Patent ID: 11862370
Assignee: CHINA JILIANG UNIVERSITY
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC B  H

Claim 0:
1. A method for preparing a sintered samarium-cobalt magnet, comprising the following steps:
(1) weighing fluoride, mixing the fluoride with alcohol and a surfactant, and then performing ball milling to obtain fine fluoride powder, with an average particle size of 10-200nm;
(2) rinsing and drying the fine fluoride powder prepared in step (1) in an oxygen-free glove box to obtain fluoride powder;
(3) weighing metal raw materials according to compositions of Sm2(CoFeCuZr)17 alloy, and then smelting the raw materials uniformly to obtain alloy ingots;
(4) crushing the alloy ingots, and obtaining magnetic powder by powder processing, with an average particle size of 2.5-5.2 μm;
(5) mixing the fluoride powder prepared in step (2) with alcohol, and preparing a suspension by ultrasonic treatment;
(6) spreading the magnetic powder prepared in step (4) evenly on a platinum sheet A at a bottom of a container, and pouring the suspension prepared in step (5) into the container; after pouring, placing a platinum sheet B on a surface of the liquid in a suspended manner, completely immersing the platinum sheet B in the suspension, then performing deposition treatment under an electric field, and applying a voltage to the platinum sheets A and B, with the platinum sheet B serving as a positive electrode and the platinum sheet A serving as a negative electrode, to obtain deposited magnetic powder;
(7) performing magnetic field orientation molding and cold isostatic pressing on the deposited powder prepared in step (6) to obtain compacts; and
(8) sintering, solution-treating and annealing the compacts prepared in step (7) to obtain a sintered samarium-cobalt magnet.