Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
N-type bismuth telluride-based material and preparation method thereof
The invention discloses an n-type bismuth telluride-based material and a preparation method thereof, and the preparation method comprises the following steps: S1, weighing Bi, In, Te and Se elementary substances according to a chemical composition formula ratio, carrying out vacuum sealing, carrying out swing melting, and then rapidly cooling to room temperature to obtain a bulk material with a chemical formula of Bi (2-x) InxTe2.7-ySe0.3, 0 < x < = 0.10, 0 < = y < = 0.05; s2, carrying out planetary ball milling on the blocky material to obtain a powder material; s3, sintering the powder material to obtain an n-type bismuth telluride-based sintered block; s4, repeating the steps S2-S3 on the n-type bismuth telluride-based sintered block for 2-4 times to obtain an n-type bismuth telluride-based material after multiple times of hot forging; the n-type bismuth telluride-based material is prepared by the method. Through the design of bismuth telluride alloy components and ball milling and hot pressing processes, the thermoelectric performance and the mechanical performance of the n-type bismuth telluride-based alloy are successfully improved; the bismuth telluride-based material is doped by adopting the simple substance In, and the replacement of Bi by In can increase point defects, improve the conductivity and reduce the thermal conductivity.
本发明公开了一种n型碲化铋基材料及其制备方法，制备方法包括以下步骤：S1、根据化学组成式配比进行称量Bi、In、Te、Se单质，真空密封后，进行摇摆熔融，然后快速冷却至室温，得到化学式为Bi2‑xInxTe2.7‑ySe0.3块状材料，其中，0＜x≤0.10、0≤y≤0.05；S2、对块状材料进行行星球磨，得到粉体材料；S3、对粉体材料进行烧结，得到n型碲化铋基烧结块体；S4、将n型碲化铋基烧结块体重复S2‑S3步骤，重复2‑4次，得到多次热锻后的n型碲化铋基材料；n型碲化铋基材料采用上述方法制备；本发明的对碲化铋合金成分的设计和球磨、热压工艺，成功地提高了n型碲化铋基合金的热电性能、机械性能；采用单质In对碲化铋基材料进行掺杂，In对Bi的取代能够增加点缺陷，提高电导率，降低了热导率。
N-type bismuth telluride-based material and preparation method thereof
The invention discloses an n-type bismuth telluride-based material and a preparation method thereof, and the preparation method comprises the following steps: S1, weighing Bi, In, Te and Se elementary substances according to a chemical composition formula ratio, carrying out vacuum sealing, carrying out swing melting, and then rapidly cooling to room temperature to obtain a bulk material with a chemical formula of Bi (2-x) InxTe2.7-ySe0.3, 0 < x < = 0.10, 0 < = y < = 0.05; s2, carrying out planetary ball milling on the blocky material to obtain a powder material; s3, sintering the powder material to obtain an n-type bismuth telluride-based sintered block; s4, repeating the steps S2-S3 on the n-type bismuth telluride-based sintered block for 2-4 times to obtain an n-type bismuth telluride-based material after multiple times of hot forging; the n-type bismuth telluride-based material is prepared by the method. Through the design of bismuth telluride alloy components and ball milling and hot pressing processes, the thermoelectric performance and the mechanical performance of the n-type bismuth telluride-based alloy are successfully improved; the bismuth telluride-based material is doped by adopting the simple substance In, and the replacement of Bi by In can increase point defects, improve the conductivity and reduce the thermal conductivity.
本发明公开了一种n型碲化铋基材料及其制备方法，制备方法包括以下步骤：S1、根据化学组成式配比进行称量Bi、In、Te、Se单质，真空密封后，进行摇摆熔融，然后快速冷却至室温，得到化学式为Bi2‑xInxTe2.7‑ySe0.3块状材料，其中，0＜x≤0.10、0≤y≤0.05；S2、对块状材料进行行星球磨，得到粉体材料；S3、对粉体材料进行烧结，得到n型碲化铋基烧结块体；S4、将n型碲化铋基烧结块体重复S2‑S3步骤，重复2‑4次，得到多次热锻后的n型碲化铋基材料；n型碲化铋基材料采用上述方法制备；本发明的对碲化铋合金成分的设计和球磨、热压工艺，成功地提高了n型碲化铋基合金的热电性能、机械性能；采用单质In对碲化铋基材料进行掺杂，In对Bi的取代能够增加点缺陷，提高电导率，降低了热导率。
N-type bismuth telluride-based material and preparation method thereof
一种n型碲化铋基材料及其制备方法
HE ZHUCHEN (Autor:in) / SHI YIXUAN (Autor:in) / TANG TAO (Autor:in)
23.05.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
N-type bismuth telluride-based thermoelectric material and preparation method thereof
| Europäisches Patentamt | 2024
P-type bismuth telluride thermoelectric material and preparation method thereof
| Europäisches Patentamt | 2020
P-type bismuth telluride-based thermoelectric material and macro preparation method thereof
| Europäisches Patentamt | 2024
| Europäisches Patentamt | 2023
Preparation method of bismuth telluride-based thermoelectric material
| Europäisches Patentamt | 2021