A kind of preparation method of bi-te based thermoelectric material with core-shell structure
A thermoelectric material and shell structure technology, applied in thermoelectric device node lead-out materials, metal processing equipment, coatings, etc., can solve problems such as difficult mass production, long processing time, complicated process, etc., and achieve low equipment cost, manufacturing The effect of large amount of powder and simple processing technology
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Embodiment 1
[0026] This embodiment prepares the Bi-Te based thermoelectric material with core-shell structure according to the following steps:
[0027] (1) Preparation of Bi 0.5 Sb 1.5 Te 3 -Cu core-shell structure powder
[0028] Take Bi with a particle size not greater than 100 μm 0.5 Sb 1.5 Te 3 The thermoelectric powder is a matrix powder, which is ultrasonically bathed in a 5% nitric acid solution for 30 minutes, then precipitated, washed 3 times with deionized water, and dried at 50°C for 4 hours to obtain activated Bi 0.5 Sb 1.5 Te 3 Thermoelectric powder.
[0029] Activated Bi 0.5 Sb 1.5 Te 3 The thermoelectric powder is added to the electroless plating solution, and the electroless plating solution is ultrasonically bathed for 30 minutes at 60°C to coat the powder; then precipitate, rinse with deionized water for 3 times, and then dry at 50°C for 4 hours to obtain the powder Reduction in hydrogen at 300°C for 1 hour to obtain Bi with Cu coating 0.5 Sb 1.5 Te 3 -Cu...
Embodiment 2
[0038] This embodiment prepares the Bi-Te based thermoelectric material with core-shell structure according to the following steps:
[0039] (1) Preparation of Bi 0.5 Sb 1.5 Te 3 -Cu core-shell structure powder
[0040] Take Bi with a particle size not greater than 100 μm 0.5 Sb 1.5 Te 3 The thermoelectric powder is a matrix powder, which is ultrasonically bathed in a 5% nitric acid solution for 30 minutes, then precipitated, washed 3 times with deionized water, and dried at 50°C for 4 hours to obtain activated Bi 0.5 Sb 1.5 Te 3 Thermoelectric powder.
[0041] Activated Bi 0.5 Sb 1.5 Te 3 The thermoelectric powder is added to the electroless plating solution, and the electroless plating solution is ultrasonically bathed for 30 minutes at 60°C to coat the powder; then precipitate, rinse with deionized water for 3 times, and then dry at 50°C for 4 hours to obtain the powder Reduction in hydrogen at 300°C for 1.5 hours yields Bi with Cu coating 0.5 Sb 1.5 Te 3 -Cu...
Embodiment 3
[0049] This embodiment prepares the Bi-Te based thermoelectric material with core-shell structure according to the following steps:
[0050] (1) Preparation of Bi 0.5 Sb 1.5 Te 3 -Cu core-shell structure powder
[0051] Take Bi with a particle size not greater than 100 μm 0.5 Sb 1.5 Te 3 The thermoelectric powder is a matrix powder, which is ultrasonically bathed in a 5% nitric acid solution for 30 minutes, then precipitated, washed 3 times with deionized water, and dried at 50°C for 4 hours to obtain activated Bi 0.5 Sb 1.5 Te 3 Thermoelectric powder.
[0052] Activated Bi 0.5 Sb 1.5 Te 3 The thermoelectric powder is added to the electroless plating solution, and the electroless plating solution is ultrasonically bathed for 30 minutes at 60°C to coat the powder; then precipitate, rinse with deionized water for 3 times, and then dry at 50°C for 4 hours to obtain the powder Reduction in hydrogen at 300°C for 1.5 hours yields Bi with Cu coating 0.5 Sb 1.5 Te 3 -Cu...
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Abstract
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