Preparation method of artificially synthesized fluorphlogopite powder coated with nano metal silver

Abstract

A preparation method for nanometer metal silver wrapping synthetic fluorophlogopite powder comprises the following steps of (1) pre-processing synthetic fluorophlogopite powder including (1-1) coarsening and (1-2) activation, specifically, a first active layer is wrapped on the coarsened synthetic fluorophlogopite powder through the liquid phase precipitation method, and the chemical components of the first active layer is SnO2, SiO2 or ZnO; and a second active layer is wrapped on the first active layer through the liquid phase precipitation method, and the chemical components of the second active layer is TiO2, CaO, Al2O3 or ZrO2; (2) preparation of a silver-ammonia solution; and (3) wrapping the activated synthetic fluorophlogopite powder with a nanometer metal silver layer through the silver mirror reaction. The nanometer metal silver wrapping synthetic fluorophlogopite powder prepared through the preparation method has good electric conduction, heat conduction and catalysis properties, good decoration property, high strength, high toughness, good chemical resistance, no poison and no impurity, low weight and the like excellent properties, and the cost is low, and the cost performance is high.

Description

technical field [0001] The invention relates to the manufacture of powder, in particular to a method for preparing artificially synthesized fluorphlogopite powder coated with nano-metal silver. Background technique [0002] Silver powder has the advantages of good electrical conductivity, strong oxidation resistance, and stable chemical properties, but its high price limits its wide application. As the price of international silver metal rises, the use of silver powder at low cost has become a luxury. How to reduce the amount of silver metal used to reduce costs has become a major problem perplexing the development of this industry. [0003] Silver plating on the surface of ordinary powder can save the amount of silver. If the surface coating is relatively complete, it can replace silver powder under certain circumstances. Silver plating has many methods such as electroplating, chemical plating, and vapor deposition. Among them, the chemical plating method has the advantag...

AI Technical Summary

Problems solved by technology

[0004] Now there are composite silver powders (non-metallic powders coated with silver on the surface) prepared by non-metal matrix materials in the market as conductive fillers, which have the advantages of light weight, good electrical and thermal conductivity, etc., but the technical process is immature, so that the prepared composite silver powder exists There are many problems such as high impurity content, low coating amount, brittle coating layer, and weak coating layer; while the composite silver powder made of metal matrix materials (such as copper) is generally better in quality, but the price is still high. And the texture is heavy