Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Thermoelectric ceramic material and preparation method thereof
The invention discloses a thermoelectric ceramic material and a preparation method thereof, and the method comprises the steps: (1) mixing Se powder, Bi powder, Bi2O3 powder, Ln2O3 powder and Cu powder, and tabletting to obtain a precursor; (2) heating the precursor so that the precursor is subjected to a self-propagating reaction to obtain a block after the reaction; and (3) crushing and grinding the block after the reaction, and then carrying out spark plasma sintering, so as to obtain the Bi2LnO4Cu2Se2 thermoelectric ceramic material. The method disclosed by the invention is simple in process, low in cost, short in preparation flow and suitable for batch production, and the total consumed time is within 2 hours, so that engineering application is realized. In addition, the complex oxygen-containing layered compound Bi2LnO4Cu2Se2 thermoelectric ceramic material with low thermal conductivity, high conductivity and better thermoelectric performance can be prepared by adopting the method, and has potential application value in the fields of waste heat power generation, electric heating refrigeration and the like.
本发明公开了一种热电陶瓷材料及其制备方法，其中，该方法包括：(1)将Se粉、Bi粉、Bi2O3粉、Ln2O3粉和Cu粉混合后压片，以便得到前驱体；(2)将所述前驱体进行加热，以便使所述前驱体发生自蔓延反应，得到反应后块体；(3)将所述反应后块体粉碎和研磨后进行放电等离子烧结，以便得到Bi2LnO4Cu2Se2热电陶瓷材料。本申请的方法工艺简单，成本低，制备流程简短，总耗时在2h以内，可适用于批量化生产，进而实现工程化应用。此外，采用该方法可以制备得到具有低热导，高电导和较好的热电性能的复杂含氧层状化合物Bi2LnO4Cu2Se2热电陶瓷材料，在废热发电和电热制冷等领域具有潜在的应用价值。
Thermoelectric ceramic material and preparation method thereof
The invention discloses a thermoelectric ceramic material and a preparation method thereof, and the method comprises the steps: (1) mixing Se powder, Bi powder, Bi2O3 powder, Ln2O3 powder and Cu powder, and tabletting to obtain a precursor; (2) heating the precursor so that the precursor is subjected to a self-propagating reaction to obtain a block after the reaction; and (3) crushing and grinding the block after the reaction, and then carrying out spark plasma sintering, so as to obtain the Bi2LnO4Cu2Se2 thermoelectric ceramic material. The method disclosed by the invention is simple in process, low in cost, short in preparation flow and suitable for batch production, and the total consumed time is within 2 hours, so that engineering application is realized. In addition, the complex oxygen-containing layered compound Bi2LnO4Cu2Se2 thermoelectric ceramic material with low thermal conductivity, high conductivity and better thermoelectric performance can be prepared by adopting the method, and has potential application value in the fields of waste heat power generation, electric heating refrigeration and the like.
本发明公开了一种热电陶瓷材料及其制备方法，其中，该方法包括：(1)将Se粉、Bi粉、Bi2O3粉、Ln2O3粉和Cu粉混合后压片，以便得到前驱体；(2)将所述前驱体进行加热，以便使所述前驱体发生自蔓延反应，得到反应后块体；(3)将所述反应后块体粉碎和研磨后进行放电等离子烧结，以便得到Bi2LnO4Cu2Se2热电陶瓷材料。本申请的方法工艺简单，成本低，制备流程简短，总耗时在2h以内，可适用于批量化生产，进而实现工程化应用。此外，采用该方法可以制备得到具有低热导，高电导和较好的热电性能的复杂含氧层状化合物Bi2LnO4Cu2Se2热电陶瓷材料，在废热发电和电热制冷等领域具有潜在的应用价值。
Thermoelectric ceramic material and preparation method thereof
热电陶瓷材料及其制备方法
LIN YUANHUA (Autor:in) / YANG YUEYANG (Autor:in) / NAN CEWEN (Autor:in)
04.03.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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