A kind of composite conductive powder and preparation method thereof

Abstract

The invention discloses composite conductive powder and a preparation method thereof, and relates to the technical field of conductive materials. According to the technical scheme, composite conductive powder is characterized by comprising silver powder and glass powder, the mass ratio of the silver powder to the glass powder is (60-70): 100, and the glass powder is prepared from, by mass, 20-30%of nano-zinc oxide, 10-20% of nano-zinc oxide, 10-20% of nano-zinc oxide and 10-20% of nano-zinc oxide. 5-10% of bismuth oxide; 1-5% of barium oxide; 0.1 to 5 percent of titanium dioxide; 0.1 to 3 percent of sodium oxide; 0.1 to 5 percent of boron oxide; 1-3% of aluminum oxide; 0.1 to 5 percent of potassium oxide; 0.1 to 5 percent of lithium oxide; 0.1-5% of copper oxide; 1-5% of chromium sesquioxide; 1-5% of zirconium dioxide; 0.5-5% of manganese dioxide; 0.1 to 5 percent of nickel oxide; 1-5% of cerium dioxide; 0.1 to 4 percent of phosphorus pentoxide; 0.1 to 3 percent of antimonous oxide; 0.1 to 2 percent of molybdenum trioxide; 1-5% of tin dioxide; wherein the total percentage is 100%. The composite conductive powder has the advantages of being good in acid resistance and not prone tofalling off.

Description

technical field [0001] The invention relates to the technical field of conductive materials, in particular to a composite conductive powder and a preparation method thereof. Background technique [0002] A conductive material is a material that has a large number of charged particles that can move freely under the action of an electric field, so it can conduct current well. Including conductor materials and superconducting materials. At present, silver, copper, nickel and other metal conductive powders are a kind of widely used conductive fillers. Copper and nickel-based conductive particles are relatively cheap, but have the disadvantage of being easily oxidized and reducing the conductivity. Metal silver has many advantages such as small contact resistance, good conductivity, excellent thermal conductivity and corrosion resistance. Therefore, in the field of electronics industry in recent years, a large number of fine powders of Ag have been used as conductive fillers su...

AI Technical Summary

Problems solved by technology

[0004] The above-mentioned prior art scheme has the following defects: the above-mentioned conductive powder is mainly composed of lead-containing low-melting glass powder, but its use is limited due to the serious harm of lead to the environment and human body. The research and development of lead low-melting glass powder has become an inevitable trend. Lead-free glass powder has better performance in terms of sintering fluidity and softening temperature, but the prepared conductive powder still has the disadvantages of insufficient adhesion and chemical stability.

Images