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BiSbTe-based thermoelectric material and preparation method thereof
The invention discloses a BiSbTe-based thermoelectric material and a preparation method thereof, and belongs to the technical field of semiconductor materials, and the preparation method comprises the following steps: taking raw materials Bi, Sb and Te according to a stoichiometric ratio Bi < x > Sb < 2-x > Te < 3.2 >, carrying out ball milling, and carrying out spark plasma sintering to obtain the BiSbTe-based thermoelectric material; wherein x is equal to 0.35, 0.4, 0.45 and 0.5; the sintering temperature of the spark plasma sintering is circulated between 693 K and 743 K. The mechanical alloying and circulating liquid phase assisted SPS sintering process is adopted, the thermoelectric performance of (Bi, Sb) 2Te3 is effectively enhanced, especially when the cycle number is larger than 3, the electrical performance of the material is remarkably improved, and meanwhile the lattice thermal conductivity is obviously reduced.
本发明公开了一种BiSbTe基热电材料及其制备方法，属于半导体材料技术领域，包括以下步骤：按化学计量比BixSb2‑xTe3.2取原料Bi、Sb和Te，球磨后，进行放电等离子烧结，得到BiSbTe基热电材料；其中，x＝0.35，0.4，0.45和0.5；所述放电等离子烧结的烧结温度在693K～743K之间循环。本发明通过采用机械合金化与循环液相辅助SPS烧结工艺，有效地增强(Bi,Sb)2Te3的热电性能，特别是当循环数大于3时，材料的电性能显著提高，同时晶格热导率明显降低。
BiSbTe-based thermoelectric material and preparation method thereof
The invention discloses a BiSbTe-based thermoelectric material and a preparation method thereof, and belongs to the technical field of semiconductor materials, and the preparation method comprises the following steps: taking raw materials Bi, Sb and Te according to a stoichiometric ratio Bi < x > Sb < 2-x > Te < 3.2 >, carrying out ball milling, and carrying out spark plasma sintering to obtain the BiSbTe-based thermoelectric material; wherein x is equal to 0.35, 0.4, 0.45 and 0.5; the sintering temperature of the spark plasma sintering is circulated between 693 K and 743 K. The mechanical alloying and circulating liquid phase assisted SPS sintering process is adopted, the thermoelectric performance of (Bi, Sb) 2Te3 is effectively enhanced, especially when the cycle number is larger than 3, the electrical performance of the material is remarkably improved, and meanwhile the lattice thermal conductivity is obviously reduced.
本发明公开了一种BiSbTe基热电材料及其制备方法，属于半导体材料技术领域，包括以下步骤：按化学计量比BixSb2‑xTe3.2取原料Bi、Sb和Te，球磨后，进行放电等离子烧结，得到BiSbTe基热电材料；其中，x＝0.35，0.4，0.45和0.5；所述放电等离子烧结的烧结温度在693K～743K之间循环。本发明通过采用机械合金化与循环液相辅助SPS烧结工艺，有效地增强(Bi,Sb)2Te3的热电性能，特别是当循环数大于3时，材料的电性能显著提高，同时晶格热导率明显降低。
BiSbTe-based thermoelectric material and preparation method thereof
一种BiSbTe基热电材料及其制备方法
LIU FENGMING (author) / LI JINGFENG (author) / CAI BOWEN (author)
2022-12-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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