Preparation method and application of high-temperature and high-infrared emissivity ceramic material

Small-grain Sr(Zr1-yXy)Oz ceramic materials with high crystallinity are prepared through two ball milling and sintering processes, which solves the problem of low infrared emissivity of SrZrO3 ceramic materials and achieves efficient infrared radiation heat dissipation effect, making it suitable for high-power optical and electronic devices.

CN117550890BActive Publication Date: 2025-09-23INNER MONGOLIA UNIV OF TECH
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Patent Information

Application Number
CN202311463092.2
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-11-06
Publication Date
2025-09-23
Estimated Expiration
2043-11-06

AI Technical Summary

Technical Problem

The existing SrZrO3 ceramic material has a low infrared emissivity in the 1-22μm band between room temperature and 600°C, which makes it difficult to meet the efficient radiation heat dissipation needs of high-power optical and electronic devices.

Method used

A preparation process of two ball millings and two sinterings is adopted to prepare small-grain Sr(Zr1-yXy)Oz ceramic materials with high crystallinity by mixing strontium source, metal X source and zirconium source. Zr is replaced by metal oxides or hydroxides in a specific proportion to improve infrared radiation performance.

Benefits of technology

The infrared emissivity of ceramic materials in the range of room temperature-600℃ is significantly improved to 0.872-0.98, which is suitable for radiative heat dissipation of high-power optical and electronic devices. It has the advantages of low cost, simple process, energy saving and environmental protection.

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Abstract

The present invention discloses a preparation method and application of a high-temperature, high-infrared emissivity ceramic material. The preparation method comprises the following steps: mixing a strontium source, a metal X source, and a zirconium source to obtain a mixed raw material powder; placing the mixed raw material powder in a ball mill, adding anhydrous ethanol and a ball milling medium, and ball milling to obtain a mixed slurry A; drying the mixed slurry A and thoroughly grinding it to obtain a slurry powder B; pre-sintering the slurry powder B at normal pressure to obtain a pre-sintered powder C; placing the pre-sintered powder C in a ball mill, adding anhydrous ethanol and a ball milling medium, and ball milling to obtain a mixed slurry D; drying the mixed slurry D and thoroughly grinding it to obtain a slurry powder E; and slurry powder E is sintered at normal pressure. This material can be used for radiative heat dissipation in high-power optical and electronic devices. The present invention solves the technical problem of low infrared emissivity of SrZrO3 ceramic materials in the 1-22 μm band between room temperature and 600°C.
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