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High-performance zinc oxide-based composite thermoelectric ceramic and preparation method thereof
The invention discloses a high-performance zinc oxide-based composite thermoelectric ceramic and a preparation method thereof. The preparation method comprises the following steps: preparing Zn1-xFexO powder (x = 0.001-0.005, and the particle size of the powder is 10 nm-2 [mu] m) with regular morphology and uniform particle size by adopting a simple and extensible hydrothermal synthesis method, then coating a matrix with acetylene black (weighing 0.1-3 at% of the doped powder), designing a layer of interface conductive channel on the matrix through ultrasonic vibration and thermal stirring, and after the obtained powder is subjected to briquetting forming, carrying out sintering, thus obtaining the Zn1-xFexO/acetylene black composite material. And sintering and compacting at high temperature in an argon atmosphere tube furnace. According to the preparation method, internal elements are uniformly distributed, and a conductive network is constructed outside through a composite process, so that the carrier concentration of the ceramic is improved, the interface phonon scattering is increased, the lattice thermal conductivity is reduced, and the stable ZnO-based composite ceramic with high thermoelectric performance is further prepared. In addition, the process is simple in preparation, low in cost and flexible in operation process, and can be applied to actual production and application in the thermoelectric field in the future.
本发明公开了一种高性能氧化锌基复合热电陶瓷及其制备方法。采用简单可扩展的水热合成法制备形貌规则、粒度均匀的Zn1‑xFexO的粉体(x＝0.001‑0.005，粉体粒径10nm‑2μm)，再用乙炔黑(以掺杂后的粉末0.1‑3at％称重)包覆基体，通过超声振动和热搅拌在基体上设计一层界面导电通道，所得粉体在压块成型后，通过在氩气气氛管式炉中高温烧结致密。该发明实现了内部元素均匀分布，外部通过复合工艺构建了导电网络，不仅提高了陶瓷的载流子浓度，还增加了界面声子散射，降低了晶格热导率，进而制备出具有高热电性能的稳定ZnO基复合陶瓷。此外，该工艺制备简单，成本便宜，操作过程灵活，未来可用于热电领域的实际生产应用。
High-performance zinc oxide-based composite thermoelectric ceramic and preparation method thereof
The invention discloses a high-performance zinc oxide-based composite thermoelectric ceramic and a preparation method thereof. The preparation method comprises the following steps: preparing Zn1-xFexO powder (x = 0.001-0.005, and the particle size of the powder is 10 nm-2 [mu] m) with regular morphology and uniform particle size by adopting a simple and extensible hydrothermal synthesis method, then coating a matrix with acetylene black (weighing 0.1-3 at% of the doped powder), designing a layer of interface conductive channel on the matrix through ultrasonic vibration and thermal stirring, and after the obtained powder is subjected to briquetting forming, carrying out sintering, thus obtaining the Zn1-xFexO/acetylene black composite material. And sintering and compacting at high temperature in an argon atmosphere tube furnace. According to the preparation method, internal elements are uniformly distributed, and a conductive network is constructed outside through a composite process, so that the carrier concentration of the ceramic is improved, the interface phonon scattering is increased, the lattice thermal conductivity is reduced, and the stable ZnO-based composite ceramic with high thermoelectric performance is further prepared. In addition, the process is simple in preparation, low in cost and flexible in operation process, and can be applied to actual production and application in the thermoelectric field in the future.
本发明公开了一种高性能氧化锌基复合热电陶瓷及其制备方法。采用简单可扩展的水热合成法制备形貌规则、粒度均匀的Zn1‑xFexO的粉体(x＝0.001‑0.005，粉体粒径10nm‑2μm)，再用乙炔黑(以掺杂后的粉末0.1‑3at％称重)包覆基体，通过超声振动和热搅拌在基体上设计一层界面导电通道，所得粉体在压块成型后，通过在氩气气氛管式炉中高温烧结致密。该发明实现了内部元素均匀分布，外部通过复合工艺构建了导电网络，不仅提高了陶瓷的载流子浓度，还增加了界面声子散射，降低了晶格热导率，进而制备出具有高热电性能的稳定ZnO基复合陶瓷。此外，该工艺制备简单，成本便宜，操作过程灵活，未来可用于热电领域的实际生产应用。
High-performance zinc oxide-based composite thermoelectric ceramic and preparation method thereof
一种高性能氧化锌基复合热电陶瓷及其制备方法
DU XUELI (author) / PENG YAN (author) / LIU SHUOYING (author)
2024-09-17
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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