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Carbide high-entropy ceramic precursor containing rare earth, high-entropy ceramic and preparation method
The invention discloses a carbide high-entropy ceramic precursor containing rare earth. The precursor comprises at least four transition metal elements and at least one rare earth metal element, and the precursor is dissolved in one or more of methanol, ethanol, isopropanol, n-propanol, n-butanol, isobutanol, ethylene glycol monomethyl ether or ethylene glycol ethyl ether. The precursor is prepared by respectively complexing a plurality of transition metal alkoxides, mixing the obtained complex with a compound containing rare earth elements, carrying out co-hydrolysis, and performing reactionwith a carbon source. According to the preparation method of the precursor, the ratio of all the raw materials in the step is finely adjusted, so that all the elements in the precursor are uniformly distributed at a molecular level, all the metal elements are subjected to short-range diffusion in the cracking process, and all the elements can be subjected to solid solution at a relatively low temperature. The preparation of the high-entropy ceramic is different from laser sintering and oxidation reduction in a traditional method, and the high-performance ceramic with a single crystalline phaseand with all elements in a molecular-level uniform distribution state is prepared on the basis of the precursor.
本发明公开了一种含稀土的碳化物高熵陶瓷前驱体，所述前驱体包括至少4种过渡金属元素和至少1种稀土金属元素，前驱体溶于甲醇、乙醇、异丙醇、正丙醇、正丁醇、异丁醇、乙二醇甲醚或乙二醇乙醚中的一种或几种。所述前驱体是以多种过渡金属醇盐分别经络合处理后，再与含稀土元素的化合物混合进行共水解后，与碳源反应制得的。所述前驱体的制备方法精细调整了步骤中各原料的配比，使得前驱体中各元素达到分子级均匀分布，在裂解过程中各金属元素呈短程扩散，使得各元素可在较低的温度下发生固溶。所述高熵陶瓷的制备不同于传统方法中激光烧结和氧化还原，是在所述前驱体的基础上制得具有单一晶相，且各元素呈分子级均匀分布态的高性能陶瓷。
Carbide high-entropy ceramic precursor containing rare earth, high-entropy ceramic and preparation method
The invention discloses a carbide high-entropy ceramic precursor containing rare earth. The precursor comprises at least four transition metal elements and at least one rare earth metal element, and the precursor is dissolved in one or more of methanol, ethanol, isopropanol, n-propanol, n-butanol, isobutanol, ethylene glycol monomethyl ether or ethylene glycol ethyl ether. The precursor is prepared by respectively complexing a plurality of transition metal alkoxides, mixing the obtained complex with a compound containing rare earth elements, carrying out co-hydrolysis, and performing reactionwith a carbon source. According to the preparation method of the precursor, the ratio of all the raw materials in the step is finely adjusted, so that all the elements in the precursor are uniformly distributed at a molecular level, all the metal elements are subjected to short-range diffusion in the cracking process, and all the elements can be subjected to solid solution at a relatively low temperature. The preparation of the high-entropy ceramic is different from laser sintering and oxidation reduction in a traditional method, and the high-performance ceramic with a single crystalline phaseand with all elements in a molecular-level uniform distribution state is prepared on the basis of the precursor.
本发明公开了一种含稀土的碳化物高熵陶瓷前驱体，所述前驱体包括至少4种过渡金属元素和至少1种稀土金属元素，前驱体溶于甲醇、乙醇、异丙醇、正丙醇、正丁醇、异丁醇、乙二醇甲醚或乙二醇乙醚中的一种或几种。所述前驱体是以多种过渡金属醇盐分别经络合处理后，再与含稀土元素的化合物混合进行共水解后，与碳源反应制得的。所述前驱体的制备方法精细调整了步骤中各原料的配比，使得前驱体中各元素达到分子级均匀分布，在裂解过程中各金属元素呈短程扩散，使得各元素可在较低的温度下发生固溶。所述高熵陶瓷的制备不同于传统方法中激光烧结和氧化还原，是在所述前驱体的基础上制得具有单一晶相，且各元素呈分子级均匀分布态的高性能陶瓷。
Carbide high-entropy ceramic precursor containing rare earth, high-entropy ceramic and preparation method
一种含稀土的碳化物高熵陶瓷前驱体及高熵陶瓷及制备方法
YE LI (author) / SUN YANAN (author) / HAN WEIJIAN (author) / CHEN FENGHUA (author) / ZHAO TONG (author)
2020-06-19
Patent
Electronic Resource
Chinese
| European Patent Office | 2023
| European Patent Office | 2021
Carbide high-entropy ceramic precursor, high-entropy ceramic and preparation method
| European Patent Office | 2020
| European Patent Office | 2023