Surface chemical and geometrical properties of pure copper powder intended for binder jetting and sintering was written by Nyborg, Lars;Cao, Yu. And the article was included in Surface and Interface Analysis in 2022.Synthetic Route of CuH2O2 This article mentions the following:
One novel important application of sinter-based additive manufacturing involving binder jetting is copper-based products. Three different variants of nominally pure copper powder having particle size distributions with D90 < 16, 22, or 31μm were investigated in this study. The packing behavior and the flow properties using dynamic test and shear cell, as well as sp. surface area were evaluated. The analyses employed illustrate the multidimensional complexity. Because different measurements capture different aspect of the powder, it is imperative to apply a characterization approach involving different methods. Surface chem. anal. by means of XPS showed that all powder variants were covered by Cu2O, CuO, and Cu (OH)2, with Cu2O being dominant in all cases. The finest powder with D90 < 16μm tended to have higher relative amount of copper in divalent state. The average apparent oxide thickness estimated by XPS depth profiling showed that the two coarser variants had similar overall average oxide thickness, whereas the finest one possessed smaller oxide thickness. The surface chem. of the powder grades is found to be related to their rheol. behavior in dynamic condition. Considering the sp. surface areas in combination with the average oxide thicknesses, the amount of surface bound oxygen was estimated to be about~220 ppm for all three variants. Specific concerns need to be taken during the sintering of powder to keep oxygen level below that of electrolytic pitch copper (400 ppm). In the experiment, the researchers used many compounds, for example, Cuprichydroxide (cas: 20427-59-2Synthetic Route of CuH2O2).
Cuprichydroxide (cas: 20427-59-2) belongs to copper catalysts. The evolution of transition metal catalysts has attained a stage of civilization that authorizes for an extensive scope of chemical bonds formation partners to be combined efficiently. The copper-mediated C-C, C-O, C-N, and C-S bond formation is a part of one oldest reaction, emphasizing the Ullmann cross-coupling reaction.Synthetic Route of CuH2O2
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”