Electrolyte for preparing fine copper powder and use method thereof

Abstract

The invention discloses an electrolyte for preparing fine copper powder and a use method thereof. The electrolyte comprises the following components: 5g / L of copper sulfate, 400-800g / L of phosphoric acid, 200-600g / L of distilled water, 1-2g / L of gelatin and 2g / L of benzotriazole. Operation conditions of electrolysis are as follows: the interelectrode distance is 10-30cm, the temperature of the electrolyte is 5-30 DEG C, the density of cathode current is 3-8A / dm2, and a powder scraping period is 10-25min. Cathode copper is used as an anode of electrolytic production, and a 316 stainless steel plate is used as a cathode for scraping powder. Compared with a sulfuric acid electrolysis method for preparing the fine copper powder, the invention has the advantages of simple electrolyte prescription, easy control, wide technological parameter range, long service life and high batch production stability, and the prepared fine copper powder has fine and uniform distribution granularity, high purity, good forming property and strong oxidation resistance.

Description

technical field [0001] The invention relates to the technical field of hydrometallurgy, in particular to the preparation technology of electrolytic copper powder. Background technique [0002] Since the fine powder has unique properties different from traditional materials and can exhibit unique mechanical, electrical, thermal, optical and chemical properties, it is widely used in the manufacture of conductive adhesives, conductive coatings and electrode materials. The preparation of fine copper powder mainly includes ball milling method, laser gas phase synthesis method, high temperature gas phase cracking method, freeze drying method, sonochemical method, redox method, etc., but these methods have high production cost, expensive equipment and complicated process. Sulfuric acid electrolysis has a long history and mature technology, and currently occupies a dominant position in domestic and foreign copper powder production market demand. However, the production of fine copp...

AI Technical Summary

Problems solved by technology

However, the production of fine copper powder by sulfuric acid electrolysis still has a narrow range of process parameters, large particle size of copper powder, uneven particle size distribution, poor dendritic structure formation, low current efficiency, and acid mist volatilization during the production process. More, serious environmental pollution, greater harm to the human body and other shortcomings, still need to be further improved