Anti-corrosion ceramic sagger and preparation method thereof

By optimizing the raw material ratio and preparation process of the sachet, materials such as yttrium stabilized zirconia, silicon carbide and magnesium aluminum spinel are used, combined with isostatic molding and step-up temperature sintering, forming a corrosion-resistant gradient layer and mechanical interlocking structure, which solves the corrosion problem of the high-temperature sachet in the synthesis of the positive electrode material of lithium-ion battery, significantly extending the service life and reducing heavy metal pollution.

CN120365090AActive Publication Date: 2025-07-25CHANGSHA ZHONGCI NEW MATERIAL TECH CO LTD
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Patent Information

Application Number
CN202510867608.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-26
Publication Date
2025-07-25
Estimated Expiration
2045-06-26

AI Technical Summary

Technical Problem

The existing high-temperature resistant sash is corroded during the synthesis of lithium-ion battery positive electrode materials due to reaction with lithium oxide, which has a short service life, resulting in heavy metal pollution and reduced production efficiency.

Method used

Yttrium-stabilized zirconia, silicon carbide and magnesium aluminum spinel are used as aggregate layers, mullite powder and cordierite powder are used as matrix layers, combined with CeO2 modified silicon sol, and isostatic molding, step-up temperature sintering and spraying silicon nitride coating are formed to form a corrosion-resistant gradient layer and mechanical interlocking structure.

Benefits of technology

It significantly improves the corrosion resistance of the silhouette, reduces the corrosion depth, increases the life span several times, reduces heavy metal pollution, and improves production efficiency.

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Abstract

The invention provides an anti-corrosion ceramic sagger and a preparation method thereof.The anti-corrosion ceramic sagger comprises an aggregate layer and a matrix layer, and the aggregate layer is prepared from, by mass, 30-50 parts of yttrium-stabilized zirconia, 20-30 parts of silicon carbide and 15-25 parts of magnesium aluminate spinel; the matrix layer is prepared from the following raw materials in parts by mass: 40 to 50 parts of mullite micro powder, 30 to 40 parts of cordierite micro powder and 10 to 20 parts of binding agent. According to the anti-corrosion ceramic sagger and the preparation method thereof, by optimizing the raw material ratio and the preparation process, the corrosion depth is smaller than or equal to 0.19 mm after the sagger is soaked in the molten salt environment at 900 DEG C for 72 h, the service life is prolonged by 6-8 times compared with that of a traditional corundum sagger, and the anti-corrosion ceramic sagger has wide application prospects.
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