Ytterbium-doped tin selenide thermoelectric material and preparation method thereof
A technology of thermoelectric materials and tin selenide, which is applied in the direction of thermoelectric device junction lead-out materials, thermoelectric device manufacturing/processing, thermoelectric devices that only use Peltier or Seebeck effect, etc., can solve the problem of weak mechanical properties of materials and high preparation costs problem, achieve the effect of reducing synthesis energy consumption, shortening time consumption, and decreasing thermal conductivity
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Embodiment 1
[0026] Add 19.8 mmol of stannous chloride dihydrate, 20 mmol of selenium dioxide and 0.2 mmol of ytterbium chloride hexahydrate into 80 mL of ethylene glycol, and add 90 mmol of sodium hydroxide, stir at room temperature for 10 minutes, and then seal the hydrothermal kettle. The solvothermal reaction was carried out at 230°C, and the reaction time was 36 hours. After the reaction, the hydrothermal kettle was cooled to room temperature, and the product was taken out and washed twice with deionized water and absolute ethanol respectively. The centrifugation speed was 8000r / min, and the centrifugation time 5min, then vacuum-dry at 60°C for 12h, take out the sample, grind it into powder, put it into a special graphite mold with an inner diameter of 10mm, and carry out spark plasma sintering, the sintering temperature is 650°C, the holding time is 15 minutes, and the sintering pressure is 50MPa . The thermoelectric performance test was carried out in the direction perpendicular to ...
Embodiment 2
[0028] Add 19.6 mmol of stannous chloride dihydrate, 20 mmol of selenium dioxide and 0.4 mmol of ytterbium chloride hexahydrate into 80 mL of ethylene glycol, and add 90 mmol of sodium hydroxide, stir at room temperature for 10 minutes, and then seal the hydrothermal kettle. The solvothermal reaction was carried out at 230°C, and the reaction time was 36 hours. After the reaction, the hydrothermal kettle was cooled to room temperature, and the product was taken out and washed twice with deionized water and absolute ethanol respectively. The centrifugation speed was 8000r / min, and the centrifugation time 5min, then vacuum-dry at 60°C for 12h, take out the sample, grind it into powder, put it into a special graphite mold with an inner diameter of 10mm, and carry out spark plasma sintering, the sintering temperature is 650°C, the holding time is 15 minutes, and the sintering pressure is 50MPa . The thermoelectric performance test was carried out in the direction perpendicular to ...
Embodiment 3
[0030] Add 19.4 mmol of stannous chloride dihydrate, 20 mmol of selenium dioxide and 0.6 mmol of ytterbium chloride hexahydrate into 80 mL of ethylene glycol, and add 90 mmol of sodium hydroxide, stir at room temperature for 10 minutes, and then seal the hydrothermal kettle. The solvothermal reaction was carried out at 230°C, and the reaction time was 36 hours. After the reaction, the hydrothermal kettle was cooled to room temperature, and the product was taken out and washed twice with deionized water and absolute ethanol respectively. The centrifugation speed was 8000r / min, and the centrifugation time 5min, then vacuum-dry at 60°C for 12h, take out the sample, grind it into powder, put it into a special graphite mold with an inner diameter of 10mm, and carry out spark plasma sintering, the sintering temperature is 650°C, the holding time is 15 minutes, and the sintering pressure is 50MPa . The thermoelectric performance test was carried out in the direction perpendicular to ...
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