Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Carbide high-entropy ceramic precursor, high-entropy ceramic and preparation method
The invention discloses a carbide high-entropy ceramic precursor, a high-entropy ceramic and a preparation method. The precursor comprises at least four of Ti, Zr, Hf, V, Nb, Ta, Mo and W, the amountof substance of each metal element accounts for 5-35% of the total amount of substance of the precursor, and the precursor is dissolved in 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 metal alkoxides, mixing, co-hydrolyzing and mixing with a carbon source for reaction. According to the preparation method of the precursor, the ratio of the raw materials in the steps is finely adjusted, so that all elements in the precursor are uniformly distributed at the molecular level, all metal elements are in short-range diffusion in the cracking process, and the solid solution temperature of all elements is relatively low. The high-entropy ceramic is high-performance ceramic, which is prepared on the basis of the precursor and has a single crystalline phase, and all elements are uniformly distributed in a molecular level.
本发明公开了一种碳化物高熵陶瓷前驱体及高熵陶瓷及制备方法，所述前驱体包括Ti、Zr、Hf、V、Nb、Ta、Mo、W元素中的至少4种，各金属元素物质的量均占前驱体总金属物质的量的5～35％，所述前驱体溶于甲醇、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。所述前驱体是以多种金属醇盐分别经络合处理后，混合进行共水解并与碳源混合反应制得的。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，因此各元素发生固溶的温度相对较低。所述高熵陶瓷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的高性能陶瓷。
Carbide high-entropy ceramic precursor, high-entropy ceramic and preparation method
The invention discloses a carbide high-entropy ceramic precursor, a high-entropy ceramic and a preparation method. The precursor comprises at least four of Ti, Zr, Hf, V, Nb, Ta, Mo and W, the amountof substance of each metal element accounts for 5-35% of the total amount of substance of the precursor, and the precursor is dissolved in 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 metal alkoxides, mixing, co-hydrolyzing and mixing with a carbon source for reaction. According to the preparation method of the precursor, the ratio of the raw materials in the steps is finely adjusted, so that all elements in the precursor are uniformly distributed at the molecular level, all metal elements are in short-range diffusion in the cracking process, and the solid solution temperature of all elements is relatively low. The high-entropy ceramic is high-performance ceramic, which is prepared on the basis of the precursor and has a single crystalline phase, and all elements are uniformly distributed in a molecular level.
本发明公开了一种碳化物高熵陶瓷前驱体及高熵陶瓷及制备方法，所述前驱体包括Ti、Zr、Hf、V、Nb、Ta、Mo、W元素中的至少4种，各金属元素物质的量均占前驱体总金属物质的量的5～35％，所述前驱体溶于甲醇、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。所述前驱体是以多种金属醇盐分别经络合处理后，混合进行共水解并与碳源混合反应制得的。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，因此各元素发生固溶的温度相对较低。所述高熵陶瓷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的高性能陶瓷。
Carbide high-entropy ceramic precursor, high-entropy ceramic and preparation method
一种碳化物高熵陶瓷前驱体及高熵陶瓷及制备方法
YE LI (Autor:in) / SUN YANAN (Autor:in) / HAN WEIJIAN (Autor:in) / CHEN FENGHUA (Autor:in) / ZHAO TONG (Autor:in)
31.07.2020
Patent
Elektronische Ressource
Chinesisch
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