US 11,053,135 B2
Scalable process for manufacturing iron cobalt nanoparticles with high magnetic moment
Qi Chen, Santa Ana, CA (US); and Zhigang Lin, Santa Ana, CA (US)
Assigned to Aegis Technology Inc., Santa Ana, CA (US)
Filed by Aegis Technology Inc., Santa Ana, CA (US)
Filed on May 3, 2019, as Appl. No. 16/403,468.
Prior Publication US 2020/0361784 A1, Nov. 19, 2020
Int. Cl. B22F 9/24 (2006.01); C01G 51/00 (2006.01); C01G 49/00 (2006.01); B82Y 30/00 (2011.01); B82Y 40/00 (2011.01)
CPC C01G 51/003 (2013.01) [C01G 49/0009 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01P 2004/04 (2013.01); C01P 2004/64 (2013.01); C01P 2006/42 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method of producing CoFe nanoparticles that comprises: (a) providing a first aqueous hydroxide solution; (b) preparing a second aqueous solution containing iron ions and cobalt ions; and (c) depositing measured volumes of the second aqueous solution into the first aqueous solution whereby coprecipitation yields CoFe alloy nanoparticles which have diameters from 5 nm to 40 nm and which have a magnetic saturation (Ms) of from 210 to 235 emu/g, wherein step (c) occurs in an environment that is essentially free of oxygen.