Nickel-coated graphite electric conduction powder used for electric conduction rubber and manufacturing method thereof

Abstract

The invention concretely discloses a nickel-coated graphite electric conduction powder used for electric conduction rubber and a manufacturing method of the nickel-coated graphite electric conduction powder. The nickel-coated graphite electric conduction powder used for the electric conduction rubber comprises 50-80% of nickel and 20-50% of graphite. The manufacturing method of the nickel-coated graphite electric conduction powder used for the electric conduction rubber mainly includes the four steps of oil removing treatment on graphite powder, acid etching and roughening treatment on the graphite powder, surface activating treatment on the graphite powder and chemical nickel plating. The nickel-coated graphite electric conduction powder has the advantages of pure nickel and pure graphite, is low in cost and not prone to rusting and further can improve the mechanical strength of the electric conduction rubber material. The chemical nickel plating method is easy to operate and simple in technology, plated layers are even and compact, the throwing power is high, plating can be performed on particles in any shape, the covering power is high, and the even, fine and dispersed composite powder can be manufactured.

Description

Technical field [0001] The invention belongs to a conductive powder for electromagnetic shielding and a preparation method thereof, in particular to a nickel-coated graphite conductive powder for conductive rubber and a preparation method thereof. Background technique [0002] In recent years, with the popularization of various electrical appliances, computers, communication satellites, high-voltage transmission grids, and some medical equipment have been widely used, especially with the miniaturization, integration, lightweight and digitalization of electronic circuits and components, resulting in daily use Of electronic products are susceptible to interference from external electromagnetic waves and malfunction. Therefore, electromagnetic shielding and absorbing materials will become new materials in the application field, and conductive fillers are the main raw materials that constitute high-performance electromagnetic wave shielding and absorbing materials. However, current ...

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Problems solved by technology

However, the current conductive fillers have some defects. For example, copper-based coatings have good conductivity, but poor oxidation resistance; silver powder has good conductivity, but is expensive; High density, high cost, etc. At the same time, when nickel powder is made into conductive rubber, its surface resistivity is higher than that of copper-based conductive rubber, and the shielding effect in the low-frequency region (<30MHz) is not as good as that of copper-based conductive rubber.

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