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Quentabasic high-entropy cerate ceramic as well as preparation method and application thereof
The invention provides quinary high-entropy cerate ceramic as well as a preparation method and application thereof, and belongs to the technical field of thermal barrier materials. The quinary high-entropy cerate ceramic provided by the invention is of a fluorite structure, and the chemical formula of the quinary high-entropy cerate ceramic is (La < 0.2 > Y < 0.2 > Gd < 0.2 > Y < b > < 0.2 > Lu < 0.2 >) < 2 > Ce2O7. The thermal conductivity of the quinary high-entropy cerate ceramic provided by the invention is 2.19-1.13 W.m <-1 >. K <-1 > at the temperature of room temperature to 1200 DEG C, the quinary high-entropy cerate ceramic has low thermal conductivity no matter under normal temperature or high temperature conditions, and no thermal shrinkage phenomenon is observed in the range of 200-350 DEG C, which shows that the quinary high-entropy cerate ceramic provided by the invention has good thermal properties; besides, after the quinary high-entropy cerate ceramic provided by the invention is subjected to CMAS corrosion for 2 hours and 12 hours under the condition of 1300 DEG C, the thicknesses of reaction layers are only about 5 microns and 7 microns respectively, so that the quinary high-entropy cerate ceramic has excellent high-temperature CMAS corrosion resistance.
本发明提供了一种五元高熵铈酸盐陶瓷及其制备方法和应用，属于热障材料技术领域。本发明提供的五元高熵铈酸盐陶瓷为萤石结构，化学式为(La0.2Y0.2Gd0.2Yb0.2Lu0.2)2Ce2O7。本发明提供的五元高熵铈酸盐陶瓷在室温～1200℃的热导率为2.19～1.13W·m‑1·K‑1，无论在常温还是高温条件下均具有较低的热导率，200～350℃范围内未观察到热收缩现象，说明本发明提供的五元高熵铈酸盐陶瓷具有良好的热学性能；此外，本发明提供的五元高熵铈酸盐陶瓷在1300℃条件下CMAS腐蚀2h和12h后，反应层厚度分别仅大约为5μm和7μm，说明具有优异的高温抗CMAS腐蚀的能力。
Quentabasic high-entropy cerate ceramic as well as preparation method and application thereof
The invention provides quinary high-entropy cerate ceramic as well as a preparation method and application thereof, and belongs to the technical field of thermal barrier materials. The quinary high-entropy cerate ceramic provided by the invention is of a fluorite structure, and the chemical formula of the quinary high-entropy cerate ceramic is (La < 0.2 > Y < 0.2 > Gd < 0.2 > Y < b > < 0.2 > Lu < 0.2 >) < 2 > Ce2O7. The thermal conductivity of the quinary high-entropy cerate ceramic provided by the invention is 2.19-1.13 W.m <-1 >. K <-1 > at the temperature of room temperature to 1200 DEG C, the quinary high-entropy cerate ceramic has low thermal conductivity no matter under normal temperature or high temperature conditions, and no thermal shrinkage phenomenon is observed in the range of 200-350 DEG C, which shows that the quinary high-entropy cerate ceramic provided by the invention has good thermal properties; besides, after the quinary high-entropy cerate ceramic provided by the invention is subjected to CMAS corrosion for 2 hours and 12 hours under the condition of 1300 DEG C, the thicknesses of reaction layers are only about 5 microns and 7 microns respectively, so that the quinary high-entropy cerate ceramic has excellent high-temperature CMAS corrosion resistance.
本发明提供了一种五元高熵铈酸盐陶瓷及其制备方法和应用，属于热障材料技术领域。本发明提供的五元高熵铈酸盐陶瓷为萤石结构，化学式为(La0.2Y0.2Gd0.2Yb0.2Lu0.2)2Ce2O7。本发明提供的五元高熵铈酸盐陶瓷在室温～1200℃的热导率为2.19～1.13W·m‑1·K‑1，无论在常温还是高温条件下均具有较低的热导率，200～350℃范围内未观察到热收缩现象，说明本发明提供的五元高熵铈酸盐陶瓷具有良好的热学性能；此外，本发明提供的五元高熵铈酸盐陶瓷在1300℃条件下CMAS腐蚀2h和12h后，反应层厚度分别仅大约为5μm和7μm，说明具有优异的高温抗CMAS腐蚀的能力。
Quentabasic high-entropy cerate ceramic as well as preparation method and application thereof
一种五元高熵铈酸盐陶瓷及其制备方法和应用
LIU LING (author) / MA ZHUANG (author) / LIU YANBO (author) / GAO LIHONG (author) / XU FEIHAN (author)
2024-03-19
Patent
Electronic Resource
Chinese
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