PRODUCTION OF FINE SILVER-PALLADIUM ALLOY POWER

摘要

PURPOSE:To simply produce fine Ag-Pd alloy powder having an arbitrarily controlled composition by adding hydrazine to an acidic soln. contg. Ag and Pd ions. CONSTITUTION:An acidic soln. contg. Ag and Pd ions is used as starting material. The proper total amount of Ag and Pd is 10-200g per 1l soln. Hydrazine or a hydrazine compound is added to the soln. to deposit fine Ag-Pd alloy powder of 0.01-1.0mum average particle size by reduction. The preferred amount of hydrazine added is 2-10 times the amount (equiv.) required for the reduction. The deposited fine powder is separated by filtration, washed and dried. The dried powder is heat treated in an inert atmosphere as required. By this method, fine Ag-Pd alloy powder causing no lamellar crack when used as a material for the internal electrode of a ceramic capacitor is obtd.