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A kind of interlayer cement-based thermoelectric functional material and preparation method thereof

A technology of functional materials and thermoelectric materials, applied in the direction of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, thermoelectric devices that only use the Peltier or Seebeck effect, etc., can solve the problem of expensive, fragile, concrete structure Poor capacitance and other problems, to achieve high cost performance, low resistivity, temperature difference power generation and the promotion of industrial waste heat utilization

Inactive Publication Date: 2015-12-23
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, ordinary thermoelectric materials are generally expensive, have poor compatibility with concrete structures, are easily damaged by loads, and are difficult to be widely used in concrete structures.

Method used

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  • A kind of interlayer cement-based thermoelectric functional material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A sandwich cement-based thermoelectric functional material, such as figure 1 As shown, it comprises two carbon fiber cement boards 1 and an interlayer 2 between the two carbon fiber cement boards 1, and the interlayer 2 is Bi 2 Te 3 For the base thermoelectric material layer, the thickness of the two carbon fiber cement boards 1 is the same as 3 mm, and the thickness of the interlayer 2 is 0.5 mm.

[0019] A method for preparing a sandwich cement-based thermoelectric functional material, the method comprising the following steps:

[0020] (1) Use methyl cellulose as a dispersant to evenly disperse the carbon fiber in water, then add silica fume, cement and defoamer and mix and stir for 10 minutes to form a carbon fiber cement slurry, and mold it in a mold, wherein the length of the carbon fiber is 4mm, The amount of carbon fiber in water is 0.4%, the water-cement ratio is 0.45, the amount of silica fume added is 10% of the weight of cement, the amount of dispersant ad...

Embodiment 2

[0025] A sandwich cement-based thermoelectric functional material, such as figure 1 As shown, it comprises two carbon fiber cement boards 1 and an interlayer 2 between the two carbon fiber cement boards 1, and the interlayer 2 is Bi 2 Te 3 For the base thermoelectric material layer, the thickness of the two carbon fiber cement boards 1 is the same, 6 mm, and the thickness of the interlayer 2 is 0.1 mm.

[0026] A method for preparing a sandwich cement-based thermoelectric functional material, the method comprising the following steps:

[0027] (1) Use methyl cellulose as a dispersant to uniformly disperse carbon fibers in water, then add silica fume, cement and defoamer and mix and stir for 10 minutes to form carbon fiber cement slurry, and mold it in a mold, wherein the length of carbon fiber is 6mm, The amount of carbon fiber in water is 0.5%, the water-cement ratio is 0.50, the amount of silica fume added is 10% of the weight of cement, the amount of dispersant added is 0...

Embodiment 3

[0032] A sandwich cement-based thermoelectric functional material, such as figure 1 As shown, it comprises two carbon fiber cement boards 1 and an interlayer 2 between the two carbon fiber cement boards 1, and the interlayer 2 is Bi 2 Te 3 For the base thermoelectric material layer, the thickness of the two carbon fiber cement boards 1 is the same, 8 mm, and the thickness of the interlayer 2 is 1 mm.

[0033] A method for preparing a sandwich cement-based thermoelectric functional material, the method comprising the following steps:

[0034] (1) Use methyl cellulose as a dispersant to evenly disperse carbon fibers in water, then add silica fume, cement and defoamer and mix and stir for 10 minutes to form carbon fiber cement slurry, and mold it in a mold, wherein the length of carbon fiber is 3mm, The amount of carbon fiber in water is 0.8%, the water-cement ratio is 0.52, the amount of silica fume added is 15% of the weight of cement, the amount of dispersant added is 1.0% o...

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Abstract

The invention relates to a sandwich cement-based thermoelectric functional material and a preparation method thereof. The material includes two carbon fiber cement boards and a Bi2Te3-based thermoelectric material layer as an intermediate layer; methyl cellulose is used as a dispersant to evenly disperse the carbon fibers in water. , then add silica fume, cement and defoaming agent and mix for 10 minutes to form carbon fiber cement slurry and shape it; 15 minutes after the carbon fiber cement slurry is formed, use a brush to evenly apply a layer of bismuth telluride-based thermoelectric material on the surface of the carbon fiber cement slurry; Two pieces of carbon fiber cement slurry coated with bismuth telluride-based thermoelectric material are closely molded together, removed from the mold, and cured to obtain a sandwich type cement-based thermoelectric functional material. Compared with the existing technology, the Bi2Te3-based thermoelectric material in the present invention uses less amount, can be well combined with concrete structures, and has the advantages of high thermoelectric potential rate, low resistivity, etc., and is suitable for temperature difference power generation in concrete structures and industrial waste heat utilization. It plays a very important role in promoting and has broad prospects.

Description

technical field [0001] The invention belongs to the technical field of thermoelectric materials and preparation methods, and in particular relates to a sandwich type cement-based thermoelectric functional material and a preparation method thereof. Background technique [0002] Energy is the material basis of human activities, and energy issues have become a common concern of mankind in the 21st century. Thermoelectric materials are an important class of functional materials that use the thermoelectric effect to couple and convert thermal energy and electrical energy to each other through the movement of carriers inside the material. As a green material, devices made of thermoelectric materials have the advantages of no pollution, no noise, small size, fast response, maintenance-free, safe and reliable, and are widely used in the fields of low-grade heat sources such as solar energy and industrial waste heat. prospect. [0003] Portland cement has been the largest building ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L35/28H01L35/16H01L35/34H10N10/10H10N10/01H10N10/852
Inventor 姚武夏强左俊卿
Owner TONGJI UNIV