Three-electrode discharge plasma auxiliary ball-milling tank

Abstract

The invention discloses a three-electrode discharge plasma auxiliary ball-milling tank. The three-electrode discharge plasma auxiliary ball-milling tank comprises a connecting cylinder, a rear cover plate, a front cover plate and three electrode bars connected in parallel. The electrode bars are in transition fit connection with inner circular holes of the rear cover plate, conductive cells of theelectrode bars are simultaneously connected to a positive electrode of a plasma power supply, the whole metal cylinder is connected to a negative electrode of the plasma power supply, and discharge of the different electrode bars is mutually independent. The three-electrode discharge plasma auxiliary ball-milling tank is simple and practical, local high-intensity discharge can be easily achievedby adjusting the power within the working voltage range of the plasma power supply, and the ionization rate of gas in the ball-milling tank and the ball milling energy efficiency are greatly improved.Meanwhile, multi-electrode discharge can effectively prevent the discharge interruption phenomenon caused by damage of a single electrode bar in the ball-milling process, so that the failure rate ofa plasma-assisted ball mill is remarkably reduced, and the application of the plasma-assisted ball mill in actual production is promoted.

Description

Technical field [0001] The present invention belongs to the field of powder metallurgy and mechanical alloying, and it is specifically involved in three electrode discharge plasma auxiliary ball grinding tanks and it is prepared in the preparation of lithium ion battery electrode materials, sodium ion battery electrodes, hydrogen storage materials, carbide, etc. Applications. Background technique [0002] In recent years, media blocking discharge plasma auxiliary ball mill is a new type of efficient implementation of mechanical alloying external auxiliary ball mill, the ball milling process is usually carried out in an atmosphere such as oxygen, argon, ammonia, hydrogen, and external high frequency high pressure. The electric field action will ionize the gas to form a low temperature plasma having a high energy density. The electron temperature of the low-temperature plasma is extremely high, which can be instantaneously heated to the microemotion of the powder, so that the surfa...

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Problems solved by technology

However, in the single-electrode discharge mode, due to the large gap between the positive and negative electrodes, the electric field strength in the ball mill tank is low, and the gas is not completely ionized, so the plasma energy density is low, which affects the energy efficiency of the ball mill.

Moreover, during the working process, the electrode rod is in the environment of non-uniform electric field and high mechanical force for a long time, its service life is short, and the phenomenon of discharge interruption often occurs when the ball mill is running, so the dielectric barrier discharge plasma assisted ball mill is used in practice. The failure rate in the application is high, affecting continuous use

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