Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Fluorite-pyrochlore double-phase high-entropy oxide ceramic powder and preparation method thereof
The invention discloses fluorite-pyrochlore double-phase high-entropy oxide ceramic powder and a preparation method thereof, and relates to the technical field of high-performance ceramics. The preparation method comprises the following steps: (1) weighing ZrO2 powder, HfO2 powder, Pr6O11 powder, La2O3 powder and Sm2O3 powder with equal atomic percent, putting the ZrO2 powder, the HfO2 powder, the Pr6O11 powder, the La2O3 powder and the Sm2O3 powder into a crucible, and calcining in a muffle furnace to remove moisture and impurities; (2) carrying out ball-milling mixing on the calcined ZrO2 powder, HfO2 powder, Pr6O11 powder, La2O3 powder and Sm2O3 powder, and drying and grinding in a drying box after ball-milling to obtain high-entropy ceramic oxide precursor powder; and (3) putting the high-entropy ceramic oxide precursor powder into a muffle furnace, carrying out heat treatment in an air atmosphere, and cooling and grinding to obtain the high-entropy oxide ceramic powder with the fluorite-pyrochlore dual-phase structure. The chemical formula of the prepared double-phase high-entropy ceramic powder material is (Zr, Hf, Pr, La, Sm) O < 2-delta >, and the double-phase high-entropy ceramic powder material is of a fluorite-pyrochlore double-phase structure, and has low heat conductivity, high thermal expansion coefficient and good heat-conducting property.
本发明公开了一种萤石‑烧绿石双相高熵氧化物陶瓷粉体及其制备方法，涉及高性能陶瓷技术领域。制备过程为：(1)称取等原子百分比的ZrO2、HfO2、Pr6O11、La2O3、Sm2O3粉末置于坩埚中，在马弗炉中煅烧除去水分和杂质；(2)对煅烧后的ZrO2、HfO2、Pr6O11、La2O3、Sm2O3粉末进行球磨混合，球磨结束后置于干燥箱中干燥研磨得到高熵陶瓷氧化物前驱体粉末；(3)将高熵陶瓷氧化物前驱体粉末置于马弗炉中，在空气气氛中进行热处理，冷却研磨后得到具有萤石‑烧绿石双相结构的高熵氧化物陶瓷粉体。本发明制得的双相高熵陶瓷粉体材料的化学式为(Zr,Hf,Pr,La,Sm)O2‑δ，为萤石‑烧绿石双相结构，具有较低热导率和较高热膨胀系数，导热性能良好。
Fluorite-pyrochlore double-phase high-entropy oxide ceramic powder and preparation method thereof
The invention discloses fluorite-pyrochlore double-phase high-entropy oxide ceramic powder and a preparation method thereof, and relates to the technical field of high-performance ceramics. The preparation method comprises the following steps: (1) weighing ZrO2 powder, HfO2 powder, Pr6O11 powder, La2O3 powder and Sm2O3 powder with equal atomic percent, putting the ZrO2 powder, the HfO2 powder, the Pr6O11 powder, the La2O3 powder and the Sm2O3 powder into a crucible, and calcining in a muffle furnace to remove moisture and impurities; (2) carrying out ball-milling mixing on the calcined ZrO2 powder, HfO2 powder, Pr6O11 powder, La2O3 powder and Sm2O3 powder, and drying and grinding in a drying box after ball-milling to obtain high-entropy ceramic oxide precursor powder; and (3) putting the high-entropy ceramic oxide precursor powder into a muffle furnace, carrying out heat treatment in an air atmosphere, and cooling and grinding to obtain the high-entropy oxide ceramic powder with the fluorite-pyrochlore dual-phase structure. The chemical formula of the prepared double-phase high-entropy ceramic powder material is (Zr, Hf, Pr, La, Sm) O < 2-delta >, and the double-phase high-entropy ceramic powder material is of a fluorite-pyrochlore double-phase structure, and has low heat conductivity, high thermal expansion coefficient and good heat-conducting property.
本发明公开了一种萤石‑烧绿石双相高熵氧化物陶瓷粉体及其制备方法，涉及高性能陶瓷技术领域。制备过程为：(1)称取等原子百分比的ZrO2、HfO2、Pr6O11、La2O3、Sm2O3粉末置于坩埚中，在马弗炉中煅烧除去水分和杂质；(2)对煅烧后的ZrO2、HfO2、Pr6O11、La2O3、Sm2O3粉末进行球磨混合，球磨结束后置于干燥箱中干燥研磨得到高熵陶瓷氧化物前驱体粉末；(3)将高熵陶瓷氧化物前驱体粉末置于马弗炉中，在空气气氛中进行热处理，冷却研磨后得到具有萤石‑烧绿石双相结构的高熵氧化物陶瓷粉体。本发明制得的双相高熵陶瓷粉体材料的化学式为(Zr,Hf,Pr,La,Sm)O2‑δ，为萤石‑烧绿石双相结构，具有较低热导率和较高热膨胀系数，导热性能良好。
Fluorite-pyrochlore double-phase high-entropy oxide ceramic powder and preparation method thereof
一种萤石-烧绿石双相高熵氧化物陶瓷粉体及其制备方法
JI WEIHUA (Autor:in) / MIAO YANG (Autor:in) / HOU JIADONG (Autor:in) / MENG ZIXI (Autor:in) / MA CHAO (Autor:in)
10.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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