Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HfC-coated SiC-coated C core-shell type nanopowder and preparation method thereof
The invention relates to HfC-coated SiC-coated C core-shell nanopowder and a preparation method thereof, belongs to the technical field of surface modification of ultrahigh-temperature ceramic powder, and solves the technical problems of long process period, high cost and difficulty in ensuring coating uniformity of a process for coating carbon on the surfaces of ultrahigh-temperature modified silicon carbide ceramic particles. Preparing a modified HfC coupling solution; adding resorcinol into the modified HfC coupling solution, and stirring to obtain an intermediate solution; sequentially adding formaldehyde and ammonia water, and stirring until phenolic aldehyde is formed to obtain a cross-linked mixed solution; the cross-linked mixed solution is centrifugally dried, centrifugally dried powder is placed into ethyl alcohol and deionized water to be cleaned, the cleaned powder is dried and cured, and HfC-coated RF powder is obtained; and cracking the HfC-coated RF powder to obtain the HfC-coated SiC-coated C core-shell type nano powder. The preparation method is used for preparing the core-shell type nano powder.
本发明涉及一种HfC@SiC@C核壳型纳米粉末及其制备方法，属于超高温陶瓷粉体表面改性技术领域，解决超高温改性碳化硅陶瓷颗粒表面包覆碳工艺周期长、成本高、包覆均匀性难以保证的技术问题，其制备方法包括HfC改性；制备改性HfC偶联溶液；改性HfC偶联溶液加入间苯二酚，搅拌得到中间溶液；依次加入甲醛、氨水，搅拌至形成酚醛，得到交联混合溶液；将交联混合溶液离心干燥，将离心干燥粉末置入乙醇、去离子水中清洗，将清洗的粉末烘干固化，得到HfC@RF粉末；将HfC@RF粉末裂解，得到HfC@SiC@C核壳型纳米粉末的步骤。该制备方法用于核壳型纳米粉末制备。
HfC-coated SiC-coated C core-shell type nanopowder and preparation method thereof
The invention relates to HfC-coated SiC-coated C core-shell nanopowder and a preparation method thereof, belongs to the technical field of surface modification of ultrahigh-temperature ceramic powder, and solves the technical problems of long process period, high cost and difficulty in ensuring coating uniformity of a process for coating carbon on the surfaces of ultrahigh-temperature modified silicon carbide ceramic particles. Preparing a modified HfC coupling solution; adding resorcinol into the modified HfC coupling solution, and stirring to obtain an intermediate solution; sequentially adding formaldehyde and ammonia water, and stirring until phenolic aldehyde is formed to obtain a cross-linked mixed solution; the cross-linked mixed solution is centrifugally dried, centrifugally dried powder is placed into ethyl alcohol and deionized water to be cleaned, the cleaned powder is dried and cured, and HfC-coated RF powder is obtained; and cracking the HfC-coated RF powder to obtain the HfC-coated SiC-coated C core-shell type nano powder. The preparation method is used for preparing the core-shell type nano powder.
本发明涉及一种HfC@SiC@C核壳型纳米粉末及其制备方法，属于超高温陶瓷粉体表面改性技术领域，解决超高温改性碳化硅陶瓷颗粒表面包覆碳工艺周期长、成本高、包覆均匀性难以保证的技术问题，其制备方法包括HfC改性；制备改性HfC偶联溶液；改性HfC偶联溶液加入间苯二酚，搅拌得到中间溶液；依次加入甲醛、氨水，搅拌至形成酚醛，得到交联混合溶液；将交联混合溶液离心干燥，将离心干燥粉末置入乙醇、去离子水中清洗，将清洗的粉末烘干固化，得到HfC@RF粉末；将HfC@RF粉末裂解，得到HfC@SiC@C核壳型纳米粉末的步骤。该制备方法用于核壳型纳米粉末制备。
HfC-coated SiC-coated C core-shell type nanopowder and preparation method thereof
一种HfC@SiC@C核壳型纳米粉末及其制备方法
CHENG SU (Autor:in) / FU JIAWEI (Autor:in) / DENG YINGYING (Autor:in) / LU TONG (Autor:in) / XUE ZHENGWEI (Autor:in) / LIU GUANGHAI (Autor:in) / CHEN XU (Autor:in) / XU JIANFENG (Autor:in)
13.12.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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