High-entropy ceramic powder, and preparation method and application thereof: Fid-Bau Portal

High-entropy ceramic powder, and preparation method and application thereof

GUO WEIMING / LIU QIUYU / ZHANG YAN / LIN HUATAI

The invention belongs to the field of ceramic materials, and discloses high-entropy ceramic powder, and a preparation method and application thereof. The method comprises the following steps: mixing Hf(NO3)4, Zr(NO3)4, Ti(NO3)4, TaO(NO3)3, NbO(NO3)3 and amorphous boron, adding absolute ethyl alcohol and a dispersing agent, adjusting the pH value to 9-10, stirring and heating at 70-90 DEG C, drying, grinding, performing heat treatment at 600-800 DEG C in a protective atmosphere, grinding, sieving, pressing into a blank, calcining at 1400-1600 DEG C in the protective atmosphere, grinding, and sieving to obtain the high-entropy ceramic powder. The molecular formula of thehigh-entropy ceramic powder is(HfxZryTizTanNbm)B2, wherein x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, z is greater than or equal to 0 and less than or equal to 1, n is greater than or equal to 0 and less than or equal to 1, m is greater than orequal to 0 and less than or equal to 1, and x + y + z + n + m = 1. The method is simple, mild in reaction and environmentally friendly, the powder is uniform and small in particle size, and sinteringof the high-entropy ceramic is facilitated.

本发明属于陶瓷材料领域，公开了一种高熵陶瓷粉体及其制备方法和应用。该方法是将Hf(NO3)4、Zr(NO3)4、Ti(NO3)4、TaO(NO3)3、NbO(NO3)3和无定形硼混合，加入无水乙醇和分散剂，调节pH至9～10，在70～90℃搅拌加热，然后干燥后研磨，在保护气氛下600～800℃热处理，研磨过筛后压成坯体在保护气氛下1400～1600℃煅烧，研磨过筛得到高熵陶瓷粉体；其分子式为(HfxZryTizTanNbm)B2，0≤x≤1，0≤y≤1，0≤z≤1，0≤n≤1，0≤m≤1，且满足x+y+z+n+m＝1。该方法简单、反应温和且绿色环保，该粉体均匀且粒径较细，有利于高熵陶瓷的烧结。

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