Alumina electro-vacuum ceramic and metallization method and application thereof

Through the Al2O3 gel impregnation method and screen printing technology of high melting point ceramic microfibers, a porous aerogel layer is formed, which solves the problem of not being tightly bonded to the ceramic and the metallized layer, and improves the sealing tensile strength and gas of alumina ceramics Tightness, enhances binding force and reduces thermal stress.

CN119191883APending Publication Date: 2024-12-27JINGDEZHEN YUNENG CERAMIC TECH CO LTD +1
View PDF 6 Cites 0 Cited by

Patent Information

Application Number
CN202411319271.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-22
Publication Date
2024-12-27

AI Technical Summary

Technical Problem

During the sintering process, the existing molybdenum manganese metallization method has high smoothness on the ceramic surface and insufficient metallization slurry composition, resulting in the metallization layer not being tightly bonded to the ceramic, which affects the sealing tensile strength and airtightness of alumina ceramics.

Method used

Using the Al2O3 gel impregnation method of high melting point ceramic microfibers, metallized paste is applied to the surface of alumina ceramics through screen printing to form a porous Al2O3 aerogel layer, which promotes glass phase migration and forms a transition layer, and enhances the ceramics and The bonding force of the metallization layer.

Benefits of technology

The tensile strength and airtightness of alumina ceramics are improved, the thermal stress caused by the difference in thermal expansion coefficient is reduced, cracks are avoided, and the bonding strength is improved through fiber toughening.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN119191883A_ABST
    Figure CN119191883A_ABST
Patent Text Reader

Abstract

The invention discloses a metallization method of aluminum oxide electric vacuum ceramics, which comprises the following steps: S1, preparing Al2O3 gel containing high-melting-point ceramic microfibers, then dipping aluminum oxide ceramics in the Al2O3 gel, and covering the surface of the aluminum oxide ceramics with a layer of Al2O3 gel; s2, drying and pre-sintering the alumina ceramic of which the surface is covered with the Al2O3 gel to obtain an Al2O3 aerogel layer; s3, preparing a metallization paste agent, and coating the metallization paste agent on the surface of the Al2O3 aerogel layer in a silk-screen printing manner; and S4, carrying out metallization sintering on the aluminum oxide ceramic. According to the metallization method of the aluminum oxide electric vacuum ceramic, the molybdenum metallization layer can be more compact in the sintering process, and the molybdenum metallization layer and the aluminum oxide ceramic can be combined more tightly, so that the sealing tensile strength and the air tightness of the aluminum oxide ceramic can be improved.
Need to check novelty before this filing date? Find Prior Art

Citation Information

Patent Citations

  • Metal composite layer on aluminum oxide ceramic surface and composite technique thereof

    CN101104567A

  • Surface metallization layer of high-purity alumina ceramics and compounding technology thereof

    CN102795894A

  • Formula for high-strength metallization of ceramic vacuum switch tube and application method thereof

    CN103449846A

  • Metallization process of aluminum oxide ceramic

    CN114702335A

  • Coating method

    KR1019980008355A