Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Porous high-entropy carbide powder as well as preparation method and application thereof
The invention belongs to the field of non-oxide ceramic powder, and discloses porous high-entropy carbide powder as well as a preparation method and application thereof. The porous high-entropy carbide powder is prepared by the following steps: adding deionized water into mixed powder of ammonium metavanadate, ammonium chromate, ammonium niobate oxalate compound, ammonium molybdate, ammonium metatungstate and ammonium citrate, heating in a water bath at 70-80 DEG C until the powder is completely dissolved, and drying the obtained ammonium salt aqueous solution at 45-75 DEG C to prepare a high-entropy carbide ammonium salt precursor; and performing dry pressing on the high-entropy carbide ammonium salt precursor to form a green body, performing heat treatment in a nitrogen atmosphere, heating to 1500-1600 DEG C, preserving heat, and cooling along with a furnace temperature after the heat treatment is finished. The high-entropy carbide powder has a single high-entropy carbide phase, the surface of the high-entropy carbide powder has a porous structure, the particle size of the powder is 0.47-0.79 mu m, and the powder is applied to the field of aerospace parts or chemical catalysis.
本发明属于非氧化物陶瓷粉体领域，公开了一种多孔高熵碳化物粉体及其制备方法和应用。所述多孔高熵碳化物粉体是将偏钒酸铵、铬酸铵、铌酸铵草酸盐水化合物、钼酸铵、偏钨酸铵和柠檬酸铵的混合粉体加入去离子水，在70～80℃水浴加热直至粉体全部溶解，将得到的铵盐水溶液在45～75℃干燥，制得高熵碳化物铵盐前驱体；再将高熵碳化物铵盐前驱体干压成坯体，在氮气气氛进行热处理，升温至1500～1600℃下保温，结束后随炉温冷却制得。该高熵碳化物粉体具有单一的高熵碳化物相，且表面具有多孔结构，粉体粒径为0.47～0.79μm，该粉体应用在航空航天零部件或化学催化领域。
Porous high-entropy carbide powder as well as preparation method and application thereof
The invention belongs to the field of non-oxide ceramic powder, and discloses porous high-entropy carbide powder as well as a preparation method and application thereof. The porous high-entropy carbide powder is prepared by the following steps: adding deionized water into mixed powder of ammonium metavanadate, ammonium chromate, ammonium niobate oxalate compound, ammonium molybdate, ammonium metatungstate and ammonium citrate, heating in a water bath at 70-80 DEG C until the powder is completely dissolved, and drying the obtained ammonium salt aqueous solution at 45-75 DEG C to prepare a high-entropy carbide ammonium salt precursor; and performing dry pressing on the high-entropy carbide ammonium salt precursor to form a green body, performing heat treatment in a nitrogen atmosphere, heating to 1500-1600 DEG C, preserving heat, and cooling along with a furnace temperature after the heat treatment is finished. The high-entropy carbide powder has a single high-entropy carbide phase, the surface of the high-entropy carbide powder has a porous structure, the particle size of the powder is 0.47-0.79 mu m, and the powder is applied to the field of aerospace parts or chemical catalysis.
本发明属于非氧化物陶瓷粉体领域，公开了一种多孔高熵碳化物粉体及其制备方法和应用。所述多孔高熵碳化物粉体是将偏钒酸铵、铬酸铵、铌酸铵草酸盐水化合物、钼酸铵、偏钨酸铵和柠檬酸铵的混合粉体加入去离子水，在70～80℃水浴加热直至粉体全部溶解，将得到的铵盐水溶液在45～75℃干燥，制得高熵碳化物铵盐前驱体；再将高熵碳化物铵盐前驱体干压成坯体，在氮气气氛进行热处理，升温至1500～1600℃下保温，结束后随炉温冷却制得。该高熵碳化物粉体具有单一的高熵碳化物相，且表面具有多孔结构，粉体粒径为0.47～0.79μm，该粉体应用在航空航天零部件或化学催化领域。
Porous high-entropy carbide powder as well as preparation method and application thereof
一种多孔高熵碳化物粉体及其制备方法和应用
GUO WEIMING (Autor:in) / LIU YANG (Autor:in) / LIN HUATAI (Autor:in)
05.12.2023
Patent
Elektronische Ressource
Chinesisch
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