Preparation method of high-coercivity manganese gallium magnetic powder
A high coercive force, permanent magnet powder technology, applied in the direction of magnetic materials, magnetic objects, electrical components, etc., can solve the problems that it is difficult to obtain high magnetic energy product and magnetic anisotropy, and achieve short milling time and high Effects of remanence and high coercive force
Inactive Publication Date: 2018-01-23
BEIJING UNIV OF TECH
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Abstract
The invention discloses a preparation method of high-coercivity manganese gallium magnetic powder, and belongs to the technical field of a magnetic material. The method for preparing the high-coercivity manganese gallium magnetic powder by a mode of introducing micro strain comprises the steps of obtaining a Mn<x>Ga alloy ingot through a suspension smelting technology firstly; performing annealingat a temperature of 400-650 DEG C for 1-10 days to obtain a tetragonal phase; performing rough crushing and sieving and then putting into a ball mill tank prepared from stainless steel; by adopting gasoline as a medium and by combination with a low-energy ball milling method, performing ball milling for 0-3.5h to obtain the high-coercivity manganese gallium magnetic powder, wherein the micro strain is 0.3-1.0 based on different ingredients and processing technologies. By virtue of rough smashing and by combination with the low-energy ball milling method, the manganese gallium magnetic powderis prepared, so that the problem of phase change caused by overhigh ball milling energy can be avoided; and meanwhile, a phenomenon of induced magnetic anisotropy and high coercivity induced by the stress is observed, so that a new means is provided for magnetic hardening of the manganese gallium permanent magnetic material.
Application Domain
Magnetic materials
Technology Topic
Magnetic powderCoercivity +11
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