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Double-rare-earth niobate ceramic powder as well as preparation method and application thereof
The invention provides double-rare-earth niobate ceramic powder as well as a preparation method and application thereof, and belongs to the technical field of thermal barrier coatings. The preparation method comprises the following steps: mixing an aqueous solution of NbCl5, an ethanol solution of La (NO3) 3 and an ethanol solution of RE (NO3) 3, heating the solutions, adding ammonia water for reaction to obtain gel, and calcining the gel to generate the double-rare-earth niobate ceramic powder. The chemical formula of the double-rare-earth niobate ceramic powder is (La1-xREx) 3NbO7, x is greater than or equal to 0.3 and less than or equal to 0.5, and the particle size of the double-rare-earth niobate ceramic powder is 20-60nm. The double-rare-earth niobate ceramic powder prepared by the method can be used for preparing a double-rare-earth niobate ceramic coating by adopting atmospheric plasma spraying, and the double-rare-earth niobate ceramic coating can quickly react with low-melting-point oxide to form a compact reaction product on the surface, so that the low-melting-point oxide is prevented from further permeating into the ceramic coating.
本发明提供了一种双稀土铌酸盐陶瓷粉体及其制备方法和应用，属于热障涂层技术领域。首先将NbCl5的水溶液、La(NO3)3的乙醇溶液与RE(NO3)3的乙醇溶液混合，溶液加热后加入氨水进行反应，得到凝胶胶体，再将凝胶胶体进行煅烧，生成双稀土铌酸盐陶瓷粉体。双稀土铌酸盐陶瓷粉体的化学式为(La1‑xREx)3NbO7，其中0.3≤x≤0.5，所述双稀土铌酸盐陶瓷粉体的粒径为20～60nm。利用本发明所制备的双稀土铌酸盐陶瓷粉体采用大气等离子喷涂可制得双稀土铌酸盐陶瓷涂层，能够与低熔点氧化物快速反应在表面形成致密的反应生成物，从而防止低熔点氧化物向陶瓷涂层内部进一步渗透。
Double-rare-earth niobate ceramic powder as well as preparation method and application thereof
The invention provides double-rare-earth niobate ceramic powder as well as a preparation method and application thereof, and belongs to the technical field of thermal barrier coatings. The preparation method comprises the following steps: mixing an aqueous solution of NbCl5, an ethanol solution of La (NO3) 3 and an ethanol solution of RE (NO3) 3, heating the solutions, adding ammonia water for reaction to obtain gel, and calcining the gel to generate the double-rare-earth niobate ceramic powder. The chemical formula of the double-rare-earth niobate ceramic powder is (La1-xREx) 3NbO7, x is greater than or equal to 0.3 and less than or equal to 0.5, and the particle size of the double-rare-earth niobate ceramic powder is 20-60nm. The double-rare-earth niobate ceramic powder prepared by the method can be used for preparing a double-rare-earth niobate ceramic coating by adopting atmospheric plasma spraying, and the double-rare-earth niobate ceramic coating can quickly react with low-melting-point oxide to form a compact reaction product on the surface, so that the low-melting-point oxide is prevented from further permeating into the ceramic coating.
本发明提供了一种双稀土铌酸盐陶瓷粉体及其制备方法和应用，属于热障涂层技术领域。首先将NbCl5的水溶液、La(NO3)3的乙醇溶液与RE(NO3)3的乙醇溶液混合，溶液加热后加入氨水进行反应，得到凝胶胶体，再将凝胶胶体进行煅烧，生成双稀土铌酸盐陶瓷粉体。双稀土铌酸盐陶瓷粉体的化学式为(La1‑xREx)3NbO7，其中0.3≤x≤0.5，所述双稀土铌酸盐陶瓷粉体的粒径为20～60nm。利用本发明所制备的双稀土铌酸盐陶瓷粉体采用大气等离子喷涂可制得双稀土铌酸盐陶瓷涂层，能够与低熔点氧化物快速反应在表面形成致密的反应生成物，从而防止低熔点氧化物向陶瓷涂层内部进一步渗透。
Double-rare-earth niobate ceramic powder as well as preparation method and application thereof
一种双稀土铌酸盐陶瓷粉体及其制备方法和应用
WU SANSHUAN (author) / FENG JING (author) / CHEN LIN (author) / SU CHAOQUN (author) / LYU LIANG (author) / MIAO XIAOFENG (author) / YUN HAITAO (author)
2023-01-13
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
/
B82Y
Bestimmter Gebrauch oder bestimmte Anwendung von Nanostrukturen
,
SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES
/
C01G
Verbindungen der von den Unterklassen C01D oder C01F nicht umfassten Metalle
,
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
/
C23C
Beschichten metallischer Werkstoffe
,
COATING METALLIC MATERIAL
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