Method for manufacturing thermoelectric conversion element, thermoelectric conversion element, thermoelectric conversion module, thermoelectric conversion system, heat transport method, and power generation method

By using alkaline aqueous solutions as cutting fluid in cutting processes containing Mg and Sb, by using alkaline aqueous solutions as cutting fluid in contact steps involving the workpiece, by using alkaline aqueous solutions as cutting fluid in contact steps involving the workpiece, and by using alkaline aqueous solutions as cutting fluid in contact steps involving the workpiece, an Mg-containing film is formed, solving the problem of easy performance degradation of thermoelectric conversion elements when using water-containing cutting fluids, and achieving the effect of making it difficult for the performance of thermoelectric conversion elements to decline.

CN122460261APending Publication Date: 2026-07-24PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
Filing Date
2024-09-25
Publication Date
2026-07-24

AI Technical Summary

Technical Problem

When using water-based cutting fluids, the performance of thermoelectric conversion elements containing Mg and selected from Sb and Bi is easily reduced.

Method used

An alkaline aqueous solution is used as the cutting fluid, which comes into contact with the workpiece containing Mg and selected from Sb and Bi. During the cutting process, an alkaline aqueous solution is used to form a film containing Mg, which is then cleaned with a water-containing cleaning solution to ensure machining accuracy.

Benefits of technology

Even with water-containing cutting fluid, it is difficult to increase the resistance of the thermoelectric conversion element, and it is also difficult to decrease the performance of the thermoelectric conversion element. Therefore, it is difficult to decrease the efficiency of the thermoelectric conversion element, and it is also difficult to increase the efficiency of the thermoelectric conversion system.

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Abstract

The present disclosure provides a technology in which the performance of a thermoelectric conversion element including Mg and at least one selected from Sb and Bi is less likely to decrease even if an aqueous cutting fluid is used. A manufacturing method of a thermoelectric conversion element of the present disclosure includes: a step of bringing an alkaline aqueous solution into contact with a workpiece, i.e., a wafer (20), including Mg and at least one selected from Sb and Bi; and a step of cutting the wafer (20) while using the alkaline aqueous solution as a cutting fluid (21).
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Citation Information

Patent Citations

  • Recording material

    JP1986027281A