A kind of ferromagnetic metal material and its preparation method and application

A ferromagnetic metal, press forming technology, applied in the direction of magnetic materials, inorganic materials, magnetic objects, etc., can solve the problems of weak electronic transition, low temperature of ferromagnetic long program, limited application, etc., and achieve good magnetic anisotropy characteristics. Effect

Active Publication Date: 2022-03-08
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, the quasi-one-dimensional spin-chain ferromagnetic materials that have been studied more show insulator behavior in terms of transport, and the electronic transition between spin chains is weak, so that the ferromagnetic long-range program temperature is relatively low, which greatly limits Therefore, it is of great significance to develop new quasi-one-dimensional spin-linked ferromagnets with high magnetic transition temperature.

Method used

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  • A kind of ferromagnetic metal material and its preparation method and application
  • A kind of ferromagnetic metal material and its preparation method and application
  • A kind of ferromagnetic metal material and its preparation method and application

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Using high-purity La powder, Mn powder and As powder as raw materials, accurately weigh the three according to the La:Mn:As molar ratio of 3:1:5, and fully and uniformly grind and mix to obtain a mixture, and use a mold to grind and mix the obtained The mixture was pressed into a cylinder with a diameter of 6 mm and a height of 3 mm under a tablet press, and then the obtained cylinder was put into a high-pressure synthesis assembly block, and sintered under high temperature and high pressure at a pressure of 5 GPa and a temperature of 1300 ° C. The sintering time was After 0.5h, the sintered product was naturally cooled to room temperature to obtain ferromagnetic metal material A.

Embodiment 2

[0027] Using high-purity La powder, Mn powder and As powder as raw materials, accurately weigh the three according to the La:Mn:As molar ratio of 3:1:5, and fully and uniformly grind and mix to obtain a mixture, and use a mold to mix the uniform powder in the Press the tablet machine into a cylinder with a diameter of 6 mm and a height of 3 mm, then put the obtained cylinder into a high-pressure synthesis assembly block, and perform high-temperature and high-pressure sintering at a pressure of 4 GPa and a temperature of 1200 ° C. The sintering time is 1 hour, and the sintered product is natural. Ferromagnetic metal material B was obtained after cooling to room temperature.

Embodiment 3

[0029] Using high-purity La powder, Mn powder and As powder as raw materials, accurately weigh the three according to the La:Mn:As molar ratio of 3:1:5, and fully and uniformly grind and mix to obtain a mixture, and use a mold to mix the uniform powder in the Press the tablet machine into a cylinder with a diameter of 6 mm and a height of 3 mm, and then put the obtained cylinder into a high-pressure synthesis assembly block, and perform high-temperature and high-pressure sintering at a pressure of 6 GPa and a temperature of 1400 ° C. The sintering time is 0.5 h. The sintered product Ferromagnetic metal material C was obtained after natural cooling to room temperature.

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Abstract

A kind of ferromagnetic metal material, the chemical formula of this ferromagnetic metal material is La 3 MnAs 5 , the crystal structure is hexagonal, the space group is P63 / mcm, and the corresponding space group number is 193. The crystal structure of the ferromagnetic metal material is composed of trimerized MnAs along the c-axis direction 6 Octahedrons are connected by face sharing, forming a one-dimensional chain structure; the ab plane is composed of MnAs 6 The chains form a triangular lattice, the chains are arranged in parallel, and the distance between the chains is the lattice constant a. The ferromagnetic metal material is prepared by the following method: First, the metal La powder, the metal Mn powder and the As powder are fully ground and mixed according to the molar ratio of 3:1:5, and then the ground mixture is pressed into shape by a tablet machine, and finally in the The ferromagnetic metal material is obtained by sintering at a pressure of 3-8GPa and at a temperature of 1200-1400°C. The ferromagnetic metal material of the invention has a typical one-dimensional crystal structure, high magnetic transition temperature and good magnetic anisotropy.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a ferromagnetic metal material and its preparation method and application. Background technique [0002] As a class of important basic functional materials, ferromagnetic metal materials have been widely used in many fields such as electronics, automation, communication, medical treatment and daily necessities. At the same time, ferromagnetic materials are also used in information storage, processing and transmission. play an important role. Therefore, as an excellent high-density magnetic recording material, electromagnetic wave absorbing material, biological and medical engineering material, ferromagnetic metal materials have been widely studied and concerned by the majority of scientific researchers. [0003] The one-dimensional spin chain system exhibits novel physical properties different from two-dimensional or three-dimensional systems due to the reduction o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/03C22C30/00C22C1/04B22F3/02B22F3/10B22F9/04
CPCC22C30/00C22C28/00C22C1/04B22F3/02B22F3/10B22F9/04H01F1/0306B22F2009/041
Inventor 段磊靳常青望贤成
Owner HENAN UNIVERSITY OF TECHNOLOGY
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