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Silver-plated copper and rare earth electrode on the coating process and properties
Time:06/15/2011

  Silver-plated copper and rare earth electrode on the coating process and properties

  In this paper, copper and rare earth ceramic capacitor on the silver electrode coating process and properties. Involved in activation of rare earth were investigated liquid silver plating surface after the deposition rate of copper, silver coating rate and coating structure and morphology of impact, measured the electrochemical properties of silver-plated copper, electrical conductivity , oxidation resistance and corrosion resistance; investigated the activation of rare earth elements in the coating solution and coated the bath degrees of impact of the silver-plated copper powder containing rare earth and rare earth co-deposition mechanism of the coating process, organizational structure and performance impact mechanism and method. Electrode coating also studied the preparation process and performance.

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Tel:0086-592-5781916
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  The results showed that: rare earth deposition rate of silver-plated copper powder, coating rate and coating morphology were changed in different degrees. Involved in activation of rare earth solution, the catalytic metal surface adsorption, reducing the system energy, making the fast formation of palladium nuclei, reducing fast, easy to lose electrons, accelerated the rate of reduction of palladium ions, extending the catalytic center. RE intervention after the bath so the bath is still potential shift increased polarization and cathodic overpotential. Reduce the coating resistivity, oxidation resistance of silver-plated copper powder has also been improved. So microscopic amount of REE significantly smaller grain size, coating becomes uniform and compact, thereby reducing the coating in the corrosion rate of the electrolyte, reducing coating in aqueous solution the current density, and markedly increase the corrosion resistance of the coating. The silver electrode paste, silver-plated copper electrode paste, and copper electrode paste prepared by the dielectric properties of ceramic capacitors. Looking at the results from the experimental data, the wallet in the protection of atmosphere ceramic slurry preparation copper electrode capacitance of the capacitor is higher than the silver electrode paste prepared by ceramic capacitors, dielectric loss is lower than the silver electrode paste prepared ceramic capacitors. Capacitance and loss of copper electrode paste the value of the mean and the standard difference between the larger, less effective, to be technical and technological improvements.