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BiCuSeO-based thermoelectric material with enhanced chemical bond covalence and preparation method thereof
The invention discloses a chemical bond covalence enhanced BiCuSeO-based thermoelectric material and a preparation method thereof, and belongs to the technical field of new energy conversion. According to the stoichiometric ratio of Bi < 1-x > Pb < 0.06 > Sb < x > CuSe < 1-x > Te < x > O (x is greater than 0 and less than or equal to 0.015), high-purity powder of Bi < 2 > O, Bi, Cu, Se, Pb < O >, Sb and Te is weighed as raw materials, and the raw materials are fully ground so as to be uniformly mixed; and packaging the mixed raw material in a quartz tube in vacuum, preparing an ingot product through a high-temperature solid-phase sintering reaction, and carrying out manual grinding and vacuum hot pressing on the ingot product to obtain the chemical bond covalence enhanced BiCuSeO-based thermoelectric material. According to the BiCuSeO-based thermoelectric material prepared by the invention, after Sb and Te are introduced for doping, the covalence of chemical bonds is enhanced, and the improvement of carrier mobility is promoted; and a relatively high power factor is obtained in combination with synchronous increase of the Seebeck coefficient. And meanwhile, the reduction of the thermal conductivity is also promoted by doping Sb and Te. Finally, the thermoelectric performance of the BiCuSeO-based material is remarkably optimized.
本发明公开了一种化学键共价性增强的BiCuSeO基热电材料及其制备方法，属于新能源转换技术领域。按照Bi1‑xPb0.06SbxCuSe1‑xTexO（0＜x≤0.015）化学计量比称取Bi2O3，Bi，Cu，Se，PbO，Sb，Te高纯粉末作为原料，充分研磨以均匀混合。将混合原料真空封装于石英管中，通过高温固相烧结反应制得锭体产物，锭体产物经手动研磨、真空热压制得所述化学键共价性增强的BiCuSeO基热电材料。本发明制备的BiCuSeO基热电材料在引入Sb和Te掺杂后，化学键共价性得到增强，促进了载流子迁移率的提升；结合塞贝克系数的同步提升，获得了较高的功率因子。与此同时，Sb和Te掺杂也促进了热导率的降低。最终，所述BiCuSeO基材料的热电性能实现了显著优化。
BiCuSeO-based thermoelectric material with enhanced chemical bond covalence and preparation method thereof
The invention discloses a chemical bond covalence enhanced BiCuSeO-based thermoelectric material and a preparation method thereof, and belongs to the technical field of new energy conversion. According to the stoichiometric ratio of Bi < 1-x > Pb < 0.06 > Sb < x > CuSe < 1-x > Te < x > O (x is greater than 0 and less than or equal to 0.015), high-purity powder of Bi < 2 > O, Bi, Cu, Se, Pb < O >, Sb and Te is weighed as raw materials, and the raw materials are fully ground so as to be uniformly mixed; and packaging the mixed raw material in a quartz tube in vacuum, preparing an ingot product through a high-temperature solid-phase sintering reaction, and carrying out manual grinding and vacuum hot pressing on the ingot product to obtain the chemical bond covalence enhanced BiCuSeO-based thermoelectric material. According to the BiCuSeO-based thermoelectric material prepared by the invention, after Sb and Te are introduced for doping, the covalence of chemical bonds is enhanced, and the improvement of carrier mobility is promoted; and a relatively high power factor is obtained in combination with synchronous increase of the Seebeck coefficient. And meanwhile, the reduction of the thermal conductivity is also promoted by doping Sb and Te. Finally, the thermoelectric performance of the BiCuSeO-based material is remarkably optimized.
本发明公开了一种化学键共价性增强的BiCuSeO基热电材料及其制备方法，属于新能源转换技术领域。按照Bi1‑xPb0.06SbxCuSe1‑xTexO（0＜x≤0.015）化学计量比称取Bi2O3，Bi，Cu，Se，PbO，Sb，Te高纯粉末作为原料，充分研磨以均匀混合。将混合原料真空封装于石英管中，通过高温固相烧结反应制得锭体产物，锭体产物经手动研磨、真空热压制得所述化学键共价性增强的BiCuSeO基热电材料。本发明制备的BiCuSeO基热电材料在引入Sb和Te掺杂后，化学键共价性得到增强，促进了载流子迁移率的提升；结合塞贝克系数的同步提升，获得了较高的功率因子。与此同时，Sb和Te掺杂也促进了热导率的降低。最终，所述BiCuSeO基材料的热电性能实现了显著优化。
BiCuSeO-based thermoelectric material with enhanced chemical bond covalence and preparation method thereof
一种化学键共价性增强的BiCuSeO基热电材料及其制备方法
LI ZHOU (author) / CHEN DUO (author) / SONG JIMING (author) / SONG YINGQING (author) / XU QING (author) / QIAN JUN (author) / GAO YAN (author) / FANG XIANXIAN (author) / LE ZHENGTAO (author) / CHENG LUHAN (author)
2024-08-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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