Abstract
1. In the manufacture of copper powders of any predetermined properties by the autoclave process, it is important to bear in mind the presence in the process solution of NO3−, Cl−, or PC43− ions, which exert a specific influence upon the properties of the resultant powder. 2. Phosphate and chloride ions do not affect the kinetic parameters of the process, but nitrate ions appreciably lower the rate of powder deposition, particularly at high concentrations of free sulfuric acid in the solution. 3. The addition of nitrate ions leads to the appearance of needle-shaped particles. Increasing the concentration of chloride ions promotes the formation of equiaxed particles and growth in the yield of coarse powder fractions and in the apparent density and flowability of the powder. The effects of phosphate ions in the solution upon the properties of the powder are the reverse of those of chloride ions.
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