Ferrimagnetic material and its preparation method

A ferrimagnetic and powder technology, which is applied in the field of ferrimagnetic materials and their preparation, can solve the problems of limited production and difficult realization, and achieve the effects of easy realization, low cost and simple sintering method
CN104108924BInactive Publication Date: 2016-06-01NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
NORTH CHINA UNIV OF WATER RESOURCES & ELECTRIC POWER
Publication Date
2016-06-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a material having ferrimagnetism and a preparation method thereof. The preparation method comprises the following steps of providing Al2O3 powder, CuO powder and Fe2O3 powder, mixing the Al2O3 powder, CuO powder and Fe2O3 powder according to a preset ratio, wherein a stoichiometric mole ratio of Al: Cu: Fe is 1: 3: 4, grinding the mixed powder for preset time, and sintering the powder at a temperature of 700-900 DEG C under normal pressure in an air atmosphere to obtain AlCu3Fe4O12 having ferrimagnetism. The preparation method utilizes a solid phase method to realize sintering of the powder in air under normal pressure, has simple processes and a low cost and is suitable for industrial production.
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Description

technical field

[0001] The invention belongs to the field of inorganic non-metallic materials, and in particular relates to a ferrimagnetic material and a preparation method thereof. Background technique

[0002] Magnetic materials can generally be divided into five categories, namely paramagnetic materials, diamagnetic materials, antiferromagnetic materials, ferromagnetic materials and ferrimagnetic materials. For ferrimagnetic materials, as long as they can be magnetized to saturation under the action of a small magnetic field, not only the magnetic susceptibility χ d >0, and the value is as large as 10 1 ~10 3 The relationship between the magnetization M and the magnetic field H is a nonlinear complex function relationship, and hysteresis occurs when the magnetization is repeated.

[0003] After the external field is withdrawn, the ferrimagnetic material will quickly eliminate its magnetism, and it has a wide range of uses in electromagnetic components. Currently r...

Claims

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