Modulation Method Of Bronze Powder

Bronze powder compound is prone to have corrosion and hue change in water-based connection material

. The physical and chemical methods are used in organic and inorganic coating in the surface of bronze powder. The researchers study in oxygen uptaking of bronze powder with various reagents coated in weak alkaline water-based medium. The metal powder exporter also calculates the inhibition efficiency and observes antioxidant properties of bronze powder in different coated processing at high temperatures.

For the low gloss in water-based bronze powder, the researchers do surface modification of bronze powder by mechano-chemical method. They are involved in dispersion, alignment and floating performance of the influence of surface modification on the bronze powder compound in aqueous connection and to analyze its mechanism of action to explore the relationship between each performance, and copper powder surface treatment reagents have been optimized. The main findings are as follows.

Aqueous copper powder, corrosion and hue change is due to the oxygen reaction in weak alkaline aqueous solution. Organic acids and SiO2 bronze powder coating can effectively inhibit oxygen corrosion of copper powder, in which the citric acid can be generated with the metal chelate, the best inhibition effect, the inhibition efficiency of 95.83%, followed by ascorbic acid 90.28 %. Modification of saturated fatty acids and their salts and coupling agents are able to improve the dispersion stability of the aqueous copper powder, depending on the activity of hydrophobic and anion, the dispersion stability of long-chain alkyl is better than short chain alkyl. The one with higher activity is better than the low activity.

Bronze powders floating depends on surface modifiers and reagents used in the bronze powder (FCu 663). By changing the density and wetting of bronze powder, it affect the surface properties of bronze powder, and then bronze powder floating; is not the wettability worst point corresponds to the maximum value of the floating rate. Gloss water-based gold ink by both the polishing effect of the copper powder, the type of modification reagent and copper powder dispersed in the aqueous Tsukigane liquid and floating, when the reagents for the first adsorption, gloss depends on the dispersion rate. While in the second adsorption, it mainly depends on the floating rate.

In optimization of reagents, researchers find that adding volume of antioxidants have greatest impact on gloss degree of waterborne bronze powder. It is followed by the type of antioxidants. The joint use of 0.1% salicylic acid and surface modifiers can effectively improve gloss of waterborne bronze powder. The 0.6% hydrocarbon chain stearate have surface modification on bronze powder and the gloss degree of water-based gold ink gloss can reach 72.02. It is increased by 91.34% comparing to the unmodified bronze powder. It maintains the level of solvent-based gold ink.

Source:http://www.mhcmp.com

by: anelwew

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