US 12,350,738 B2
Method for manufacturing coated metal powder
Momo Takahashi, Chino (JP); and Takuya Miyakawa, Matsumoto (JP)
Assigned to SEIKO EPSON CORPORATION, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jun. 20, 2022, as Appl. No. 17/807,814.
Claims priority of application No. 2021-102306 (JP), filed on Jun. 21, 2021.
Prior Publication US 2022/0402026 A1, Dec. 22, 2022
Int. Cl. C23C 18/12 (2006.01); B22F 1/16 (2022.01)
CPC B22F 1/16 (2022.01) [C23C 18/122 (2013.01); C23C 18/1241 (2013.01); C23C 18/1254 (2013.01); C23C 18/127 (2013.01); B22F 2301/35 (2013.01); B22F 2302/256 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A method for manufacturing a coated metal powder, comprising:
preparing a silanol solution in which a silicon-containing substance is dissolved in an alkaline aqueous solution;
charging a metal powder into the silanol solution to obtain a dispersion; and
forming a coating containing a silicon oxide on a particle surface of the metal powder by adding an acidic aqueous solution to the dispersion,
wherein a pH of the dispersion before adding the acidic aqueous solution is higher than the pH of the dispersion after adding the acidic aqueous solution by 0.5 or more and 4.0 or less.