Patent ID: 9659762
Date: 2017-05-23
CPC Classifications: C22C,H01J,Y10T

Claim:
1. A process for producing amalgam balls which are coated with an alloy powder, wherein the alloy powder has a composition of silver (Ag) from 3% by weight to 80% by weight, copper (Cu) from 0.5% by weight to 43% by weight, tin (Sn) from 0% by weight to 96.5% by weight, zinc (Zn) from 0% by weight to 5% by weight, indium (In) from 0% by weight to 10% by weight and gold, palladium and platinum (Au/Pd/Pt), individually or in combination with one another, from 0% by weight to 5% by weight, where the amounts of the metals add up to a total of 100% by weight, said process comprising: melting the amalgam; introducing the melt dropwise into a cooling medium having a temperature below the solidification temperature of the amalgam to form amalgam balls; separating the formed amalgam balls from the cooling medium; degreasing the formed amalgam balls; sprinkling the formed amalgam balls at room temperature with the alloy powder while agitating continually until the amalgam balls no longer stick together; and subjecting the amalgam balls to a heat treatment in the process for producing the amalgam balls.