A novel method of electroless silver coating on copper powders was reported, in which hydrazine was used as the reducing agent, and had some advantages such was used as inhibiting the substitution reaction and reducin...A novel method of electroless silver coating on copper powders was reported, in which hydrazine was used as the reducing agent, and had some advantages such was used as inhibiting the substitution reaction and reducing consumption of copper powders. In the processes of sensitization and activation, AgNO3 replaces the conventional PdCl2, which solves the impurity of bath. Oxide film on the surface of copper powders was tested by chemical analysis. Ag element tested by XRD and XRF is in the form of Ago and exists on the surface of copper powders, which acts as catalyzer in reduction reaction. Morphology and composition of the coating were characterized by SEM and XRD respectively.展开更多
The resource comes from waste cupric liquor produced in the process of manufacturing printed circuit board(PCB). In the liquid phase, we get high pureness and excellent property nano Cu with the hydrazine dydrate as t...The resource comes from waste cupric liquor produced in the process of manufacturing printed circuit board(PCB). In the liquid phase, we get high pureness and excellent property nano Cu with the hydrazine dydrate as the reducer and the PVP and OP 10 as the dispersant. After the nano Cu is sensitized and acted, the nano Cu Ag Bimetallic Powders are got through 5% PVP and OP 10 are went into the plating solution and they are chemic plating. It is stated by the experimentation result that the powders can substitute Ag as the padding of conduction coating or shield coating.展开更多
This article is mainly about the prep aration of ultrafine copper-silver bimetallic powders with Direct -Red uction at the existence of macromolecule di spersant in this article￡(r)It also dis cussed the factors of c...This article is mainly about the prep aration of ultrafine copper-silver bimetallic powders with Direct -Red uction at the existence of macromolecule di spersant in this article￡(r)It also dis cussed the factors of controlling granularity which include reaction temperature,concentration of reactant,reaction time,dosage of reducing agent and macromolecule dispersant and so on￡(r)In addition,it studied the properti es of ultrafine copper-silver bimetallic powders including the antioxidatio n￡?antibacterium and conductive pro perties￡(r)It has got satisfying resul ts￡(r)展开更多
基金Funded by the National Natural Science Foundation of China(50474047)
文摘A novel method of electroless silver coating on copper powders was reported, in which hydrazine was used as the reducing agent, and had some advantages such was used as inhibiting the substitution reaction and reducing consumption of copper powders. In the processes of sensitization and activation, AgNO3 replaces the conventional PdCl2, which solves the impurity of bath. Oxide film on the surface of copper powders was tested by chemical analysis. Ag element tested by XRD and XRF is in the form of Ago and exists on the surface of copper powders, which acts as catalyzer in reduction reaction. Morphology and composition of the coating were characterized by SEM and XRD respectively.
文摘The resource comes from waste cupric liquor produced in the process of manufacturing printed circuit board(PCB). In the liquid phase, we get high pureness and excellent property nano Cu with the hydrazine dydrate as the reducer and the PVP and OP 10 as the dispersant. After the nano Cu is sensitized and acted, the nano Cu Ag Bimetallic Powders are got through 5% PVP and OP 10 are went into the plating solution and they are chemic plating. It is stated by the experimentation result that the powders can substitute Ag as the padding of conduction coating or shield coating.
文摘This article is mainly about the prep aration of ultrafine copper-silver bimetallic powders with Direct -Red uction at the existence of macromolecule di spersant in this article￡(r)It also dis cussed the factors of controlling granularity which include reaction temperature,concentration of reactant,reaction time,dosage of reducing agent and macromolecule dispersant and so on￡(r)In addition,it studied the properti es of ultrafine copper-silver bimetallic powders including the antioxidatio n￡?antibacterium and conductive pro perties￡(r)It has got satisfying resul ts￡(r)
