Abstract
Nickel sulflde powders were precipitated by utilizing the thermal decomposition of thioacetamide in acidic aqueous solutions. Precipitation was induced by a direct reaction between thioacetamide and nickel at 70° and 80°C with thioacetamide concentrations of 0.80M. Precipitation was induced by reaction of sulfide ions with nickel at 90°C and at low pH. Direct reaction products were amorphous and contained significant amounts of carbon, excess sulfur, and hydrogen. Hydrolysis‐controlled precipitation yielded faceted crystalline particles 2 to 4 μm in size. Crystalline, spherical particles with compositions near stoichiometric NiS were precipitated with high yields.
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