Method for manufacturing magnetic refrigeration material and magnetic refrigeration material

By mixing magnetic refrigeration materials with controlled magnetic transition temperature differences, the method addresses the precision challenge in AMR cycles, ensuring efficient temperature control and heat exchange in refrigeration and air conditioning systems.

JP7833591B2Active Publication Date: 2026-03-19SHIN ETSU CHEMICAL CO LTD
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Patents
Current Assignee / Owner
Filing Date
2025-04-21
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

Existing magnetic refrigeration materials face challenges in achieving precise control of magnetic transition temperatures, leading to variations that affect the performance and efficiency of AMR cycles, particularly in generating wide temperature differences required for refrigeration and air conditioning systems.

Method used

A method involving the precise mixing of two or more magnetic refrigeration materials with specific magnetic transition temperature differences and full width at half maximum ratios to achieve a target magnetic transition temperature with an accuracy of within 0.7 K, using NaZn13-based alloys with R-Fe-Si and R-Fe-Si-H compositions, ensuring accurate heat exchange in AMR cycles.

Benefits of technology

The method allows for precise adjustment of magnetic transition temperatures, enhancing the heat exchange efficiency and stability of AMR cycles by maintaining the magnetic transition temperature within 0.7 K of the target, thereby improving the performance of refrigeration and air conditioning systems.

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Abstract

To provide a method for manufacturing magnetic refrigeration material, the method enabling the magnetic transition temperature of the magnetic refrigeration material to be accurately adjusted, and magnetic refrigeration material having accurately adjusted magnetic transition temperature.SOLUTION: A method for manufacturing magnetic refrigeration material according to the present invention includes the steps of: preparing predetermined first magnetic refrigeration material and predetermined second magnetic refrigeration material different from the first magnetic refrigeration material; and mixing the first magnetic refrigeration material and the second magnetic refrigeration material to obtain third magnetic refrigeration material. The content of the first magnetic refrigeration material and the content of the second magnetic refrigeration material in the third magnetic refrigeration material are determined by the magnetic transition temperature of the first magnetic refrigeration material and of the second magnetic refrigeration material and of the target magnetic transition temperature of the third magnetic refrigeration material. The magnetic refrigeration material according to the present invention contains at least a predetermined first magnetic refrigeration material and a predetermined second magnetic refrigeration material different from the first magnetic refrigeration material, and the absolute value of the difference between the magnetic transition temperature and the target magnetic transition temperature is 0.7K or less.SELECTED DRAWING: None
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Citation Information

Patent Citations

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