Thermoelectric cement-based composite material as well as preparation method and application thereof
By introducing high-entropy oxide powder (Mg0.2Co0.2Ni0.2Zn0.4-xCux)O and carbon materials into thermoelectric cement matrix composites, the problems of low Seebeck coefficient and ZT values of existing thermoelectric cement matrix composites are solved, and performance improvement and strength maintenance are achieved.
CN120229927APending Publication Date: 2025-07-01XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Patent Information
- Application Number
- CN202510396224.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-07-01
AI Technical Summary
Technical Problem
The existing thermoelectric cement matrix composite materials have low Seebeck coefficient and ZT values, which limits their application in concrete structures.
Method used
High entropy oxide powder (Mg0.2Co0.2Ni0.2Zn0.4-xCux)O(x=0.1, 0.2, 0.3) is used to form a thermoelectric cement matrix composite material, and it is evenly distributed in the cement matrix through a two-step dispersion process.
Benefits of technology
It effectively improves the Seebeck coefficient and thermoelectric properties of cement-based composite materials, while maintaining its strength, and is suitable for use in concrete structures.
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Abstract
The invention discloses a thermoelectric cement-based composite material and a preparation method and application thereof, and belongs to the technical field of thermoelectric materials, the material comprises high-entropy oxide powder and cement; the mass of the high-entropy oxide powder is 0.2%-10.0% of the mass of the cement; the high-entropy oxide powder is (Mg < 0.2 > Co < 0.2 > Ni < 0.2 > Zn < 0.4-x > Cu < x >) O, and x is equal to 0.1, 0.2 or 0.3. The method comprises the following steps: respectively weighing CuO, NiO, CoO, MgO and ZnO dry powder, and carrying out mixed ball milling, heat preservation reaction, cooling, three-step ball milling and drying to obtain high-entropy oxide powder; the high-entropy oxide powder and cement are added into absolute ethyl alcohol, and the thermoelectric cement-based composite material is obtained after pre-dispersion, suction filtration, drying, secondary dispersion, dry pressing forming, room-temperature pre-curing and water curing. The high-entropy oxide powder is introduced into a cement matrix, crack diffusion can be effectively inhibited, pinning effects on various types of defects in the cement matrix can be generated, the Seebeck coefficient and the thermoelectric performance of the cement-based composite material can be effectively improved, and meanwhile the strength of the cement-based composite material can be guaranteed.
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