Abstract
Urea was added to the preparation of nickel - magnesium phosphate from nickel, magnesium nitrate and phosphoric acid solutions. The precipitations and their thermal products were estimated about the chemical composition, powder and acidic properties. The magnesium ratio in precipitations changed a little smaller by the addition of urea. Samples prepared with urea had larger weight loss than those prepared without urea. By the addition of urea, particle size became larger and narrow distribution. The adsorption of trimethylamine was affected from specific surface area and amount of acidic sites.
