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Pb/In co-doped BiCuSeO thermoelectric material and preparation method thereof
The invention discloses a Pb/In co-doped BiCuSeO thermoelectric material and a preparation method thereof, and belongs to the technical field of energy conversion. The material is prepared by combining solid-phase synthesis, ball milling and other methods with a hot-pressed sintering process. The preparation method comprises the following steps: by taking powder of Bi2O3, Bi, Cu, Se, Pb, In and the like as raw materials, weighing the raw materials according to the stoichiometric ratio of the chemical formula Bi < 1-x-y > Pb < x > In < y > CuSeO, uniformly grinding, packaging the mixed raw materials in a quartz tube in vacuum, and heating and annealing through a pit furnace, thereby obtaining the Bi < 1-x-y > Pb < x > In < y > CuSeO-Pb < and carrying out ball milling on the obtained powder through a ball mill to obtain powder required by hot pressing, and carrying out hot pressing sintering under proper pressure and temperature to obtain the Bi < 1-x-y > Pb < x > In < y > CuSeO block thermoelectric material. According to the Bi < 0.93 > Pb < 0.06 > In < 0.01 > CuSeO thermoelectric material prepared by the preparation method disclosed by the invention, the conductivity is 17700 to 53900 S/m, the Seebeck coefficient is 122 to 209 [mu] V/K, and the thermal conductivity is 0.55 to 0.95 W/mK. The Bi0. 93Pb0. 06In0. 1CuSeO thermoelectric material prepared by the method has the advantages of low sintering temperature, good repeatability, easiness in mass synthesis and the like, the problem of low conductivity of traditional BiCuSeO is solved, and the thermoelectric figure of merit of the BiCuSeO-based thermoelectric material is remarkably improved.
本发明公开了一种Pb/In共掺BiCuSeO热电材料及其制备方法，属于能源转换技术领域。采用固相合成，球磨等方法结合热压烧结工艺制备。以Bi2O3，Bi，Cu，Se，Pb，In等粉末作为原料，根据化学式Bi1－x－yPbxInyCuSeO的化学计量比称取原料，研磨均匀，将混合原料真空封装于石英管中，再通过井式炉加热、退火，获得的粉末再通过球磨机进行球磨得到热压所需粉末并在合适的压力和温度下进行热压烧结得到Bi1－x－yPbxInyCuSeO块体热电材料。本发明制备的Bi0.93Pb0.06In0.01CuSeO热电材料的电导率为17700~53900 S/m，塞贝克系数为122~209μV/K，热导率为0.55~0.95 W/mK。采用该方法制备的Bi0.93Pb0.06In0.01CuSeO热电材料具有烧结温度低、重复性好、易于大量合成等优点，解决了传统BiCuSeO电导率低的问题，实现了BiCuSeO基热电材料热电优值显著的提高。
Pb/In co-doped BiCuSeO thermoelectric material and preparation method thereof
The invention discloses a Pb/In co-doped BiCuSeO thermoelectric material and a preparation method thereof, and belongs to the technical field of energy conversion. The material is prepared by combining solid-phase synthesis, ball milling and other methods with a hot-pressed sintering process. The preparation method comprises the following steps: by taking powder of Bi2O3, Bi, Cu, Se, Pb, In and the like as raw materials, weighing the raw materials according to the stoichiometric ratio of the chemical formula Bi < 1-x-y > Pb < x > In < y > CuSeO, uniformly grinding, packaging the mixed raw materials in a quartz tube in vacuum, and heating and annealing through a pit furnace, thereby obtaining the Bi < 1-x-y > Pb < x > In < y > CuSeO-Pb < and carrying out ball milling on the obtained powder through a ball mill to obtain powder required by hot pressing, and carrying out hot pressing sintering under proper pressure and temperature to obtain the Bi < 1-x-y > Pb < x > In < y > CuSeO block thermoelectric material. According to the Bi < 0.93 > Pb < 0.06 > In < 0.01 > CuSeO thermoelectric material prepared by the preparation method disclosed by the invention, the conductivity is 17700 to 53900 S/m, the Seebeck coefficient is 122 to 209 [mu] V/K, and the thermal conductivity is 0.55 to 0.95 W/mK. The Bi0. 93Pb0. 06In0. 1CuSeO thermoelectric material prepared by the method has the advantages of low sintering temperature, good repeatability, easiness in mass synthesis and the like, the problem of low conductivity of traditional BiCuSeO is solved, and the thermoelectric figure of merit of the BiCuSeO-based thermoelectric material is remarkably improved.
本发明公开了一种Pb/In共掺BiCuSeO热电材料及其制备方法，属于能源转换技术领域。采用固相合成，球磨等方法结合热压烧结工艺制备。以Bi2O3，Bi，Cu，Se，Pb，In等粉末作为原料，根据化学式Bi1－x－yPbxInyCuSeO的化学计量比称取原料，研磨均匀，将混合原料真空封装于石英管中，再通过井式炉加热、退火，获得的粉末再通过球磨机进行球磨得到热压所需粉末并在合适的压力和温度下进行热压烧结得到Bi1－x－yPbxInyCuSeO块体热电材料。本发明制备的Bi0.93Pb0.06In0.01CuSeO热电材料的电导率为17700~53900 S/m，塞贝克系数为122~209μV/K，热导率为0.55~0.95 W/mK。采用该方法制备的Bi0.93Pb0.06In0.01CuSeO热电材料具有烧结温度低、重复性好、易于大量合成等优点，解决了传统BiCuSeO电导率低的问题，实现了BiCuSeO基热电材料热电优值显著的提高。
Pb/In co-doped BiCuSeO thermoelectric material and preparation method thereof
一种Pb/In共掺BiCuSeO热电材料及其制备方法
SONG JIMING (Autor:in) / LIANG XIAOLONG (Autor:in) / LI ZHOU (Autor:in) / DONG DEMING (Autor:in) / WAN HAN (Autor:in) / WEI RONG (Autor:in) / LIU YU (Autor:in) / MO HONGGUANG (Autor:in)
29.07.2022
Patent
Elektronische Ressource
Chinesisch
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