AgZnO materials has gradually emerged as a substitute for the AgCdO due to its short arcing time, high breaking performance, strong current impact resistance, and environmental harmlessness under low-voltage conditions. AgZnO materials are mainly used in motor starters, LED relays, power relays, ACB, etc. Common preparation methods for AgZnO electrical contact materials include mechanical powder mixing and alloy oxidation. Among them, the mechanical powder mixing method is often used in the production of AgZnO materials due to its advantages such as short production cycle and simple operation. However, due to the small size of ZnO powder, difficulty in dispersion and easy agglomeration, the electrical properties of AgZnO materials using the mechanical powder mixing method are unstable case.

    This study uses ultrasonic dispersion method to prepare AgZnO materials, and compares it with the mechanical powder mixing process AgZnO. The differences in its structure and properties under different preparation process conditions are analyzed to obtain an electrical contact material with excellent performance, which is a new domestic electrical contact, lay the foundation for material development.

    The results show that the particles of the AgZnO materials prepared by the ultrasonic dispersion method are small, evenly dispersed, and the matrix bonding strength is high. Compared with the AgZnO prepared by the mechanical powder mixing method, the AgZnO materials prepared by the ultrasonic dispersion method has higher density and hardness, lower resistivity, and comprehensive better performance.

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