A fine-crystal cerium-stabilized zirconia ceramic powder, a preparation method thereof and a ceramic
By utilizing NaCl melt volatilization to mediate Ce/Zr redistribution during Ce-ZrO2 ceramic powder preparation, a cerium-rich second phase is pre-precipitated, solving the problem of abnormal grain growth in traditional sintering processes. This achieves high densification and fine grain refinement, significantly improving the strength and uniformity of the material.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KUNMING UNIV OF SCI & TECH
- Filing Date
- 2026-05-06
- Publication Date
- 2026-07-17
AI Technical Summary
In the preparation of Ce-ZrO2 ceramics, the traditional sintering process leads to abnormal grain growth and reduced material strength. The active control role of byproducts generated in situ in the mechanochemical method (such as NaCl) in subsequent heat treatment is not fully utilized, and the process is complicated.
A NaCl-containing precursor was generated by high-energy ball milling and calcined in air at 950~1050℃. The redistribution of Ce/Zr was mediated by the melting and volatilization of NaCl to pre-precipitate a cerium-rich second phase. After washing and desalting with water, a composite powder was obtained. The powder was sintered at 1300℃ to achieve a pinning and dragging synergistic mechanism to inhibit grain growth.
Dense, fine-grained ceramics with a relative density of ≥98% and an average grain size of ≤0.5 μm can be obtained at relatively low sintering temperatures. The process is simple and easy to industrialize.
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Figure CN122403973A_ABST