When the temperature increases, the copper powder’s weight increases, and raising amplitude of weight is larger. It indicates that the copper powder has poor oxidation resistance. Reason for weight increasing is that the surface of copper atoms generates copper oxides t with oxygen in the air. Due to the weak oxidation resistance under such high temperature, it greatly limits the application of copper powder.

Without the need for the preparation of copper and silver metal powder, silver powder in the correct initial oxidation temperature, the next factory of electrolytic copper. Weight gain and loss of air oxidation on the composition of weight loss Ag2O, the number of components is about up and down, dust, 300 ℃, 400 ℃, followed by the water in my career ahead of adsorbed water and 400 ° C, atoms of copper oxide is coated with a loss of surface adsorption, and weight gain. To improve resistance to oxidation, as part of the local oxidation of pure copper powder (FCu), etc., the analysis of air pollution from the surface coated with a ray diffraction-10, Silver man, and more. In addition, weight gain, weight loss, three of the growth curve of the reason is that weight loss until 400 ℃ of water adsorbed on dust, weight loss is that silver is 400 100 ℃ hot.

10-ray fluorescence spectroscopy of the element copper, silver and its contents will be evident from the analysis of the material covering the surface of silver, copper powder, copper powder or silver. Strains of Cu-Ag, if the concentration is different, the content of the silver content of 87.46% silver by 6.73 percent 93.27 percent of a lot of money, material AG, Air content and surface Ag Cu, is money. Surface to get air into the dust. By providing an image for 93.27% of the main concentration of silver atoms on the surface of activated copper powder, copper powder, silver surface, which surface a continuous layer of metal powder content may be not possible for the weight when heated, but 87.46 percent silver, silver is the highest justice, while in the air, the surface of copper powder and the surface decorated false air According to the text has become the weight to be heated.

Copper powder has oxidation resistance at lower temperatures for metal powder exporter. At high temperature, it is easy to be oxidized. In the electroless plating method, a layer of metallic silver deposited on the surface will improve its oxidation resistance. It can also improve the initial oxidation temperature of copper powder. Less activated copper powder silver-plated surface of the copper impurity content and the content of the surface can reach 93.27%, the basic form a complete continuous silver film, and weight gain does not occur in the air. Not activated copper powder silver-plated surface of silver can reach 87.46%. In some parts of its surface, the embellishment of the coating structure appears. In the air, it will have a certain amount of weight gain. The activation process of non-metallic can also be applied in copper powder. It can improve quality of the surface coating and it achieves a slightly worse result.Source:http://www.mhcmp.com