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Gallium-containing bismuth telluride-based thermoelectric material and preparation method thereof
The invention provides a gallium-containing bismuth telluride-based thermoelectric material and a preparation method thereof, the gallium-containing bismuth telluride-based thermoelectric material is divided into a p type and an n type, the chemical general formula of the gallium-containing bismuth telluride-based thermoelectric material is Bi2-y-xSbyGaxTe3 and Bi2-xGaxTe3-zSez, the value range of x is greater than 0 and less than or equal to 0.05, the value range of y is greater than or equal to 0 and less than or equal to 2, and the value range of z is greater than or equal to 0 and less than or equal to 3. The preparation method comprises the following steps: weighing and mixing elementary substances according to a chemical general formula of the gallium-containing bismuth telluride-based thermoelectric material to obtain a mixture, and packaging the mixture; the packaged mixture is smelted at a high temperature, so that the mixture fully reacts in a high-temperature molten state, and then a metal cast ingot is obtained after annealing; putting the metal cast ingot into a ball-milling tank, putting ball-milling beads with different diameters according to a certain proportion, and carrying out ball-milling on the metal cast ingot to obtain a powder material; and placing the powder in a graphite mold, carrying out vacuum discharge plasma sintering and thermal deformation treatment, and cooling to obtain the gallium-containing bismuth telluride-based thermoelectric material.
本发明提供一种含镓碲化铋基热电材料及其制备方法，所述含镓碲化铋基热电材料分为p型和n型，其化学通式分别为Bi2‑y‑xSbyGaxTe3和Bi2‑xGaxTe3‑zSez，其中，x的取值范围为：0＜x≤0.05，y的取值范围为：0≤y≤2，z的取值范围为：0≤z≤3。所述制备方法包括：按照含镓碲化铋基热电材料的化学通式称取各元素单质并混合，得到混合料，并进行封装；将封装后的混合料高温熔炼，使混合料在高温熔融状态下充分反应，再经过退火后得到金属铸锭；将金属铸锭放入球磨罐中，并按一定比例放入不同直径的球磨珠后，对金属铸锭进行球磨，得到粉末料；将粉末料放置于石墨模具中，进行真空放电等离子体烧结和热变形处理，冷却后得所述含镓碲化铋基热电材料。
Gallium-containing bismuth telluride-based thermoelectric material and preparation method thereof
The invention provides a gallium-containing bismuth telluride-based thermoelectric material and a preparation method thereof, the gallium-containing bismuth telluride-based thermoelectric material is divided into a p type and an n type, the chemical general formula of the gallium-containing bismuth telluride-based thermoelectric material is Bi2-y-xSbyGaxTe3 and Bi2-xGaxTe3-zSez, the value range of x is greater than 0 and less than or equal to 0.05, the value range of y is greater than or equal to 0 and less than or equal to 2, and the value range of z is greater than or equal to 0 and less than or equal to 3. The preparation method comprises the following steps: weighing and mixing elementary substances according to a chemical general formula of the gallium-containing bismuth telluride-based thermoelectric material to obtain a mixture, and packaging the mixture; the packaged mixture is smelted at a high temperature, so that the mixture fully reacts in a high-temperature molten state, and then a metal cast ingot is obtained after annealing; putting the metal cast ingot into a ball-milling tank, putting ball-milling beads with different diameters according to a certain proportion, and carrying out ball-milling on the metal cast ingot to obtain a powder material; and placing the powder in a graphite mold, carrying out vacuum discharge plasma sintering and thermal deformation treatment, and cooling to obtain the gallium-containing bismuth telluride-based thermoelectric material.
本发明提供一种含镓碲化铋基热电材料及其制备方法，所述含镓碲化铋基热电材料分为p型和n型，其化学通式分别为Bi2‑y‑xSbyGaxTe3和Bi2‑xGaxTe3‑zSez，其中，x的取值范围为：0＜x≤0.05，y的取值范围为：0≤y≤2，z的取值范围为：0≤z≤3。所述制备方法包括：按照含镓碲化铋基热电材料的化学通式称取各元素单质并混合，得到混合料，并进行封装；将封装后的混合料高温熔炼，使混合料在高温熔融状态下充分反应，再经过退火后得到金属铸锭；将金属铸锭放入球磨罐中，并按一定比例放入不同直径的球磨珠后，对金属铸锭进行球磨，得到粉末料；将粉末料放置于石墨模具中，进行真空放电等离子体烧结和热变形处理，冷却后得所述含镓碲化铋基热电材料。
Gallium-containing bismuth telluride-based thermoelectric material and preparation method thereof
一种含镓碲化铋基热电材料及其制备方法
HU LIPENG (Autor:in) / ZHOU YUWEI (Autor:in) / LIN KE'ER (Autor:in) / PENG JIAYING (Autor:in) / WANG MORAN (Autor:in)
22.11.2024
Patent
Elektronische Ressource
Chinesisch
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