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High-entropy niobate ceramic material applied to high-temperature thermal protection and preparation method of high-entropy niobate ceramic material
The invention relates to a high-entropy niobate ceramic material applied to high-temperature thermal protection, the high-entropy niobate ceramic material has a defective fluorite structure, the chemical formula of the high-entropy niobate ceramic material is A3NbO7, A is any five elements of Pr, Ca, Fe, Co, La, Y, Gd and Yb, and the molar ratios of the metal elements are equal; the infrared radiance of the high-entropy niobate ceramic material at the wave band of 0.78-2.5 [mu] m is 0.84-0.88, the normal emissivity of the high-entropy niobate ceramic material at the wave band of 2-16 [mu] m is 0.83-0.87, and the heat conductivity coefficient of the high-entropy niobate ceramic material at 800 DEG C is 1.15-1.65 Wm <-1 > K <-1 >. Meanwhile, the invention further discloses a preparation method of the high-entropy niobate ceramic material. The material has good infrared radiation performance and low thermal conductivity, has the characteristics of single phase, high purity, small particle size, uniform element distribution and the like, and can be applied to the high-temperature thermal protection fields of coal-fired boilers, aerospace, industrial kilns and the like.
本发明涉及一种应用于高温热防护的高熵铌酸盐陶瓷材料，该高熵铌酸盐陶瓷材料具有缺陷萤石结构，化学式为A3NbO7，其中A为Pr、Ca、Fe、Co、La、Y、Gd、Yb中的任意五种元素，各金属元素为等摩尔比；所述高熵铌酸盐陶瓷材料在0.78~2.5μm波段红外辐射率为0.84~0.88，在2~16μm波段的法线发射率为0.83~0.87，800℃导热系数为1.15~1.65Wm‑1K‑1。同时，本发明还公开了该高熵铌酸盐陶瓷材料的制备方法。本发明兼具良好的红外辐射性能和较低导热率，具有物相单一、纯度高、粒径较小和元素分布均匀等特点，可应用于燃煤锅炉、航空航天、工业窑炉等高温热防护领域。
High-entropy niobate ceramic material applied to high-temperature thermal protection and preparation method of high-entropy niobate ceramic material
The invention relates to a high-entropy niobate ceramic material applied to high-temperature thermal protection, the high-entropy niobate ceramic material has a defective fluorite structure, the chemical formula of the high-entropy niobate ceramic material is A3NbO7, A is any five elements of Pr, Ca, Fe, Co, La, Y, Gd and Yb, and the molar ratios of the metal elements are equal; the infrared radiance of the high-entropy niobate ceramic material at the wave band of 0.78-2.5 [mu] m is 0.84-0.88, the normal emissivity of the high-entropy niobate ceramic material at the wave band of 2-16 [mu] m is 0.83-0.87, and the heat conductivity coefficient of the high-entropy niobate ceramic material at 800 DEG C is 1.15-1.65 Wm <-1 > K <-1 >. Meanwhile, the invention further discloses a preparation method of the high-entropy niobate ceramic material. The material has good infrared radiation performance and low thermal conductivity, has the characteristics of single phase, high purity, small particle size, uniform element distribution and the like, and can be applied to the high-temperature thermal protection fields of coal-fired boilers, aerospace, industrial kilns and the like.
本发明涉及一种应用于高温热防护的高熵铌酸盐陶瓷材料，该高熵铌酸盐陶瓷材料具有缺陷萤石结构，化学式为A3NbO7，其中A为Pr、Ca、Fe、Co、La、Y、Gd、Yb中的任意五种元素，各金属元素为等摩尔比；所述高熵铌酸盐陶瓷材料在0.78~2.5μm波段红外辐射率为0.84~0.88，在2~16μm波段的法线发射率为0.83~0.87，800℃导热系数为1.15~1.65Wm‑1K‑1。同时，本发明还公开了该高熵铌酸盐陶瓷材料的制备方法。本发明兼具良好的红外辐射性能和较低导热率，具有物相单一、纯度高、粒径较小和元素分布均匀等特点，可应用于燃煤锅炉、航空航天、工业窑炉等高温热防护领域。
High-entropy niobate ceramic material applied to high-temperature thermal protection and preparation method of high-entropy niobate ceramic material
一种应用于高温热防护的高熵铌酸盐陶瓷材料及制备方法
GAO XIANGHU (author) / HE CHENGYU (author) / XI ZHILING (author) / LIU BAOHUA (author) / ZHAO SHIJIE (author) / LU ZHONGWEI (author)
2024-05-14
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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