A construction method of antimony tellurium selenide base alloy for thermoelectric materials, antimony tellurium selenide based thermoelectric material
A technology of thermoelectric materials and matrix alloys, applied in the direction of thermoelectric device lead-out wire materials, thermoelectric device manufacturing/processing, etc., can solve the problems of high preparation cost and inability to mass industrial production, and achieve low cost and excellent performance Effect
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Embodiment 1
[0054] (1) Pulverize Sb blocks, Te blocks and Se blocks with a commercial purity of 5N;
[0055] (2) Pour dilute nitric acid solution into a quartz tube with an inner diameter of about 12mm sealed at one end, ultrasonically clean it for 15-20 minutes, then wash it twice with water and once with absolute ethanol, and then put the quartz tube in an oven at 100°C Dry for 8 hours;
[0056] (3) According to the chemical formula Sb 2 Te 3-x Se x The stoichiometric ratio of each element in the step (1) is taken by weighing a total of 80g of raw materials, and put into a dried quartz tube, wherein x=1.5, 1.8, 1.9, 2.0, 2.1, 2.4, 2.7;
[0057] (4) the vacuum degree of quartz tube in step (3) is pumped to 10 -3 Pa, and seal the other end of the quartz tube with an oxyhydrogen flame;
[0058] (5) Melting the quartz tube in step (4) in a rotary melting furnace at 800°C for 10 hours, rotating continuously during the melting process to ensure sufficient mixing of raw materials, cooling...
Embodiment 2
[0067] Such as figure 2 As shown, the preparation method of antimony tellurium selenide based thermoelectric material is as follows:
[0068] (1) Pulverize Sb blocks, Ag blocks, Te blocks and Se blocks with a commercial purity of 5N;
[0069] (2) Pour dilute nitric acid solution into a quartz tube with an inner diameter of about 12mm sealed at one end, ultrasonically clean it for 15-20 minutes, then wash it twice with water and once with absolute ethanol, and then put the quartz tube in an oven at 100°C Dry for 8 hours;
[0070] (3) Add the dopant Ag, according to the chemical formula Sb2-y Ag y TeSe 2 The stoichiometric ratio of each element in the step (1) takes by weighing 80g of raw materials altogether, puts in the quartz tube after drying, wherein y=0.005~0.03;
[0071] (4) the vacuum degree of quartz tube in step (3) is pumped to 10 -3 Pa, and seal the other end of the quartz tube with an oxyhydrogen flame;
[0072] (5) Melting the quartz tube in step (4) in a ro...
Embodiment 3
[0077] (1) Pulverize Sb lumps, Ag lumps, Pb lumps, Cu lumps, Te lumps and Se lumps with a commercial purity of 5N;
[0078] (2) Pour dilute nitric acid solution into a quartz tube with an inner diameter of about 12mm sealed at one end, ultrasonically clean it for 15-20 minutes, then wash it twice with water and once with absolute ethanol, and then put the quartz tube in an oven at 100°C Dry for 8 hours;
[0079] (3) Add dopant Ag block, Pb block, Cu block, according to the chemical formula Sb 1.98-z Ag 0.02 Cu z TeSe 2 , Sb 1.98- m Ag 0.02 Pb m TeSe 2 The stoichiometric ratio of each element in the step (1) takes by weighing 80g of raw materials altogether, puts in the quartz tube after drying, wherein z=0.005~0.015, m=0.005~0.015;
[0080] (4) the vacuum degree of quartz tube in step (3) is pumped to 10 -3 Pa, and seal the other end of the quartz tube with an oxyhydrogen flame;
[0081] (5) Melting the quartz tube in step (4) in a rotary melting furnace at 800°C fo...
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