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Porous high-entropy rare earth monosilicate ceramic powder as well as preparation method and application thereof
The invention discloses porous high-entropy rare earth monosilicate ceramic powder and a preparation method and application thereof, and relates to the technical field of high-entropy ceramics, the preparation method comprises the following steps: S1, dissolving tetraethoxysilane in absolute ethyl alcohol, and fully stirring to obtain a silicon source solution; s2, adding the silicon source solution into the rare earth nitrate solution, and fully stirring to obtain a mixed solution; s3, adding a sodium hydroxide solution into the mixed solution to serve as a rare earth ion coprecipitator and a tetraethoxysilane condensation catalyst, putting the mixed solution into a reactor, carrying out sealed reaction for 24-60 hours, and separating and drying to obtain precursor gel; and S4, calcining the precursor gel at 1350-1400 DEG C for 2-4 hours, and quenching to room temperature to obtain the porous high-entropy rare earth monosilicate ceramic powder. The porous high-entropy rare earth monosilicate ceramic powder provided by the invention has the characteristics of uniform element distribution, large component space, no impurity phase, low thermal conductivity and the like, has the advantages of simple equipment, controllable process and the like, is suitable for being used on a hot end part of an aero-engine, and has a wide application prospect.
本发明公开了一种多孔高熵稀土单硅酸盐陶瓷粉体及其制备方法和应用，涉及高熵陶瓷技术领域，包括以下步骤：S1、将正硅酸乙酯溶解于无水乙醇中，充分搅拌，作为硅源溶液；S2、将硅源溶液加入到稀土硝酸盐溶液中，充分搅拌，得到混合溶液；S3、向混合溶液中加入氢氧化钠溶液作为稀土离子共沉淀剂和正硅酸乙酯缩合催化剂，置于反应器中密封反应24‑60h，分离干燥得到前驱体凝胶；S4、将前驱体凝胶于1350‑1400℃的条件下煅烧2‑4h后淬火至室温，得到多孔高熵稀土单硅酸盐陶瓷粉体。本发明提供的多孔高熵稀土单硅酸盐陶瓷粉体，其具有元素分布均匀、组分空间大、不含杂质相、热导率低等特性以及设备简单、工艺可控等优点，适合用在航空发动机热端部件上，应用前景广阔。
Porous high-entropy rare earth monosilicate ceramic powder as well as preparation method and application thereof
The invention discloses porous high-entropy rare earth monosilicate ceramic powder and a preparation method and application thereof, and relates to the technical field of high-entropy ceramics, the preparation method comprises the following steps: S1, dissolving tetraethoxysilane in absolute ethyl alcohol, and fully stirring to obtain a silicon source solution; s2, adding the silicon source solution into the rare earth nitrate solution, and fully stirring to obtain a mixed solution; s3, adding a sodium hydroxide solution into the mixed solution to serve as a rare earth ion coprecipitator and a tetraethoxysilane condensation catalyst, putting the mixed solution into a reactor, carrying out sealed reaction for 24-60 hours, and separating and drying to obtain precursor gel; and S4, calcining the precursor gel at 1350-1400 DEG C for 2-4 hours, and quenching to room temperature to obtain the porous high-entropy rare earth monosilicate ceramic powder. The porous high-entropy rare earth monosilicate ceramic powder provided by the invention has the characteristics of uniform element distribution, large component space, no impurity phase, low thermal conductivity and the like, has the advantages of simple equipment, controllable process and the like, is suitable for being used on a hot end part of an aero-engine, and has a wide application prospect.
本发明公开了一种多孔高熵稀土单硅酸盐陶瓷粉体及其制备方法和应用，涉及高熵陶瓷技术领域，包括以下步骤：S1、将正硅酸乙酯溶解于无水乙醇中，充分搅拌，作为硅源溶液；S2、将硅源溶液加入到稀土硝酸盐溶液中，充分搅拌，得到混合溶液；S3、向混合溶液中加入氢氧化钠溶液作为稀土离子共沉淀剂和正硅酸乙酯缩合催化剂，置于反应器中密封反应24‑60h，分离干燥得到前驱体凝胶；S4、将前驱体凝胶于1350‑1400℃的条件下煅烧2‑4h后淬火至室温，得到多孔高熵稀土单硅酸盐陶瓷粉体。本发明提供的多孔高熵稀土单硅酸盐陶瓷粉体，其具有元素分布均匀、组分空间大、不含杂质相、热导率低等特性以及设备简单、工艺可控等优点，适合用在航空发动机热端部件上，应用前景广阔。
Porous high-entropy rare earth monosilicate ceramic powder as well as preparation method and application thereof
一种多孔高熵稀土单硅酸盐陶瓷粉体及其制备方法和应用
GAO LIANGJUAN (author)
2024-10-29
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
| European Patent Office | 2024
| European Patent Office | 2023
| European Patent Office | 2024
| European Patent Office | 2023