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Cr-based chalcogenide hard magnetic nanomaterial

A technology of chalcogen compounds and nanomaterials, applied in the direction of magnetic properties of inorganic materials, can solve the problem of low coercive force and achieve high coercive force

Inactive Publication Date: 2018-05-01
山西师范大学
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Therefore, the technical problem to be solved in the present invention is to overcome the defect that the coercive force is not high in the rare earth-free nano-magnetic materials in the prior art, thereby providing a Cr-based chalcogen compound hard magnetic nano-material

Method used

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Examples

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Embodiment 1

[0028] This embodiment provides a Cr-based chalcogen compound hard magnetic nanomaterial, which is obtained through the following preparation steps:

[0029] (1) 1.9mmol of Cr(CO) 6 , 0.1mmol of Co(acac) 2 and 30mL oleylamine were added to a four-necked flask equipped with a temperature regulator and a magnetic stirrer to obtain a solution containing Cr and Co. 2 Warm up to 120°C under protection and keep warm for 30min;

[0030] (2) Dissolving 3.0 mmol of Te elemental powder in 5 mL of trioctyl phosphine (TOP) to obtain a suspension solution containing Te;

[0031] (3) Inject the suspension solution containing Te into the solution containing Cr and Co, raise the temperature to 400°C at a heating rate of 5°C / min under the protection of nitrogen, and keep the reaction for 1h to obtain Cr 1.9 co 0.1 Te 3 Hard Magnetic Nanomaterials.

Embodiment 2

[0033] This embodiment provides a hard magnetic nanomaterial with a Cr-based chalcogen compound, which is obtained through the following preparation steps:

[0034] (1) 1.8mmol of Cr(CO) 6 , 0.2mmol of Co(acac) 2 Add oleylamine and 30mL into a four-necked flask equipped with a temperature regulator and a magnetic stirrer, stir for 20min to obtain a liquid containing Cr and Co, raise the temperature to 110°C under the protection of argon, and keep it warm for 20min;

[0035] (2) Dissolving 3.3 mmol of Te elemental powder in 5 mL of trioctyl phosphine (TOP) to obtain a suspension solution containing Te;

[0036] (3) Inject the suspension solution containing Te into the solution containing Cr and Co, raise the temperature to 380°C at a heating rate of 3°C / min under the protection of argon, and keep the reaction for 2h to obtain Cr 1.8 co 0.2 Te 3 Hard Magnetic Nanomaterials.

Embodiment 3

[0038] This embodiment provides a Cr-based chalcogen compound hard magnetic nanomaterial, which is obtained through the following preparation steps:

[0039] (1) 1.6mmol of Cr(CO) 6 , 0.4mmol of Co(acac) 2 and 30mL oleylamine were added into a four-necked flask equipped with a temperature regulator and a magnetic stirrer, and stirred for 30min to obtain a solution containing Cr and Co. 2 Under protection, the temperature was raised to 100°C and kept for 20 minutes;

[0040] (2) Dissolve 3.6 mmol of Te elemental powder in 5 mL of trioctyl phosphine (TOP), and sonicate for 20 min to obtain a suspension solution containing Te;

[0041] (3) Inject the suspension solution containing Te into the solution containing Cr and Co. Under the protection of nitrogen, the temperature is raised to 100°C and then the temperature is raised to 400°C at a heating rate of 2°C / min, and the temperature is kept for 3 hours to obtain Cr 1.6 co 0.4 Te 3 Hard Magnetic Nanomaterials.

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Abstract

The invention discloses a Cr-based chalcogenide hard magnetic nanomaterial. The Cr-based chalcogenide hard magnetic nanomaterial has a structure Cr<2-x>M<x>Te<3> (I) as shown in a formula (I), whereinM is selected from 3d transition metal, and x is smaller than or equal to 0.4 and greater than 0. The Cr-based chalcogenide hard magnetic nanomaterial has relatively high coercivity and is a novel non-rare earth hard magnetic nanomaterial.

Description

technical field [0001] The invention relates to the field of nano rare earth-free permanent magnet materials, in particular to a Cr-based chalcogen compound hard magnetic nano material. Background technique [0002] Permanent magnetic materials (also known as hard magnetic materials) are widely used in civil and military technical fields such as wind power generation, new energy vehicles, and computer storage due to their high coercive force (Hc) and high magnetic energy product (BH)max. In recent years, with the rapid development of the above-mentioned technologies, the demand for high-coercivity permanent magnet materials has been increasing year by year. Since rare earth elements can produce strong spin-orbit coupling interactions with 3d transition elements, it has become a necessary condition for the preparation of high-coercivity permanent magnet materials. However, due to the limited rare earth resources in the earth's crust, the price of high-performance rare earth p...

Claims

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Application Information

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IPC IPC(8): H01F1/11
CPCH01F1/11
Inventor 许小红王芳杜娟马珍珍张燕庆
Owner 山西师范大学
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