Ferromagnetic metal material and preparation method and application thereof

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, limited application, low temperature of ferromagnetic long program, and achieve good magnetic anisotropy characteristics Effect

Active Publication Date: 2021-10-08
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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  • Ferromagnetic metal material and preparation method and application thereof
  • Ferromagnetic metal material and preparation method and application thereof
  • Ferromagnetic metal material and preparation method and application thereof

Examples

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 to obtain The mixture is 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 is 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 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 Press it into a cylinder with a diameter of 6 mm and a height of 3 mm under a tablet press, 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 4 GPa and a temperature of 1200 ° C. The sintering time is 1 hour. The sintered product Ferromagnetic metal material B was obtained after natural 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 Press it into a cylinder with a diameter of 6 mm and a height of 3 mm under a tablet press, 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 ferromagnetic metal material C was obtained after natural cooling of the product to room temperature.

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Abstract

The invention discloses a ferromagnetic metal material. The the ferromagnetic metal material is characterized in that the chemical formula is La3MnAs5; the crystal structure is a hexagonal system; the space group is P63 / mcm; the corresponding space group number is 193; the crystal structure is formed by connecting trimerized MnAs6 octahedrons in a face sharing mode in the c-axis direction and is of a one-dimensional chain structure; in the ab plane, MnAs6 chains form a triangular lattice; the chains are arranged in parallel; and the distance between the chains is a lattice constant a. The ferromagnetic metal material is prepared through the following steps that metal La powder, metal Mn powder and As powder are fully ground and mixed according to the molar ratio of 3 to 1 to 5; then the ground mixture is pressed and formed through a tablet press; and finally sintering is conducted at the pressure of 3 to 8 GPa and the temperature of 1200 to 1400 DEG C to obtain the ferromagnetic metal material. The ferromagnetic metal material disclosed by the invention has a typical one-dimensional crystal structure, a relatively high magnetic transformation temperature and a relatively good magnetic anisotropy characteristic.

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 Applications(China)
IPC IPC(8): C22C30/00C22C1/04B22F3/02B22F3/10B22F9/04H01F1/03
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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