A five-element high-entropy boride ceramic powder material, a preparation method thereof and application thereof

The preparation of high-entropy boride ceramic powder by liquid-phase polymer precursor method solves the problems of complex preparation process and high cost in the existing technology, and realizes the low-temperature rapid preparation of high-purity and uniform high-entropy boride ceramic powder, which is suitable for ceramic matrix composites and ceramic fibers.

CN118420352BActive Publication Date: 2026-07-14WUHAN UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
WUHAN UNIV OF SCI & TECH
Filing Date
2024-04-30
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The preparation process of existing high-entropy transition metal boride ceramic powders is complex, costly, non-uniform, and has poor sintering performance, which limits their large-scale industrial application.

Method used

A high-entropy boride liquid-phase precursor was prepared by reacting five transition metal chlorides with carbon and boron sources in ethanol and acetylacetone solutions. After two-stage drying and pyrolysis, uniformly distributed high-entropy boride ceramic powder was obtained.

Benefits of technology

This method enables the low-cost, low-temperature, and rapid preparation of high-purity, uniformly distributed high-entropy boride ceramic powders, suitable for large-scale industrial production, and exhibits good sintering activity and structural uniformity.

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Abstract

The present application belongs to the technical field of high-entropy non-oxide ceramics, and relates to a five-element high-entropy boride ceramic powder material and a preparation method and application thereof. The present application adds chlorides of five transition metal elements into a mixed solution of ethanol and acetylacetone, then adds a carbon source and a boron source after reaction, and continues to react to obtain a high-entropy boride liquid precursor; the high-entropy boride liquid precursor is subjected to two-stage drying and two-stage cracking to obtain a high-entropy boride ceramic powder. The prepared high-entropy boride ceramic powder has high configuration entropy, high element distribution uniformity, uniform hexagonal plate-like single crystal structure and good sintering activity, and the preparation method has the advantages of low cost, simple operation, low operation temperature, short reaction time, low equipment requirement and the like, is suitable for large-scale industrial production and has the characteristics of green environmental protection.
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Citation Information

Patent Citations

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