Gadolinium boron molybdate magnetic refrigeration material with triangular magnetic resistance as well as preparation method and application of gadolinium boron molybdate magnetic refrigeration material

The Gd2B2MoO9 material addresses the limitations of existing low-temperature magnetic refrigeration materials by offering high magnetic entropy and stability, enabling efficient thermal management and industrial scalability.

CN120308973APending Publication Date: 2025-07-15HANGZHOU DIANZI UNIV
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Patent Information

Application Number
CN202510529434.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-25
Publication Date
2025-07-15

AI Technical Summary

Technical Problem

The existing low-temperature magnetic refrigeration materials have unstable chemical structures under ultra-high vacuum environments, complex preparation processes, and smaller magnetic entropy, making it difficult to meet the practical application needs.

Method used

A gadolinium boron molybdate magnetic refrigeration material Gd2B2MoO9 with a triangular magnetoresistive frustration structure was developed, which was prepared by traditional solid phase method and sol-gel method to ensure the chemical stability of the material and simplify the process and optimize the magnetic entropy change performance.

Benefits of technology

It improves the magnetic entropy change of magnetic refrigeration materials, realizes effective heat absorption and release at low temperatures, simplifies the preparation process, is suitable for large-scale industrial applications, and promotes the development of the rare earth industry.

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Abstract

The invention discloses a gadolinium boron molybdate magnetic refrigeration material with triangular magnetic resistance and a preparation method and application of the gadolinium boron molybdate magnetic refrigeration material. The chemical formula of the material is Gd2B2MoO9, the material belongs to a triclinic system, and the space group is P-1; the crystal structure has the characteristic that nearest rare earth Gd ions have magnetic resistance file; the material is prepared by a solid phase method or a sol-gel method; the magnetic phase change temperature of the material is 0.7-0.9 K, the material shows a remarkable magnetothermal effect at low temperature, the maximum isothermal magnetic entropy change values of the material are 30.0-35.0 J / kg.K and 51.0-55.0 J / kg.K respectively under the magnetic field change of 0-2T and 0-5T, and the material can be applied to low-temperature magnetic refrigeration. The gadolinium boron molybdate Gd2B2MoO9 material with triangular magnetoresistance provided by the invention has the advantages of low raw material price, simple process and lower equipment requirement, and is suitable for industrial production.
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