Scalable process for manufacturing iron cobalt nanoparticles with high magnetic moment

CoFe alloy nanoparticles that are produced by:

• (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 a fcc structure and which have diameters from 4 nm to 8 nm and which have a magnetic saturation (Ms) of from 235 to 240 emu/g, wherein step (c) occurs in an environment that is essentially free of oxygen.

CoFe alloy nanoparticles that are produced by:

• (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 with a fcc structure and which have diameters from 4 nm to 8 nm and which have a magnetic saturation (Ms) of from 235 to 240 emu/g, wherein step (c) occurs in an environment that is essentially free of oxygen wherein the first aqueous solution and the second aqueous solution are maintained at ambient temperatures between 20° C. to 25° C. and pressure of 24 to 25 Torr under and Ar or Ar/H2 environment.

CoFe alloy nanoparticles that are produced by:

• (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 with a fcc structure and which have a magnetic saturation (Ms) of from 235 to 240 emu/g, wherein step (c) occurs in an environment that is essentially free of oxygen.

CoFe alloy nanoparticles that are produced by:

• (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 with a fcc structure and which have diameters from 4 nm to 8 nm and which have a magnetic saturation (Ms) of from 235 to 240 emu/g, wherein step (c) occurs in an environment that is essentially free of oxygen.

CoFe alloy nanoparticles that are produced by a method comprising (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, wherein step (c) occurs in an environment that is essentially free of oxygen, wherein the CoFe alloy nanoparticles comprises CoxFe100-x where x is from 20 to 95, the CoFe alloy nanoparticles have a fcc structure and have diameters from 4 nm to 8 nm, and the CoFe alloy nanoparticles have a magnetic saturation (Ms) of from 235 to 240 emu/g.

CoFe alloy nanoparticles having the formulation CoxFe100-x where x is from 20 to 95, the CoFe alloy nanoparticles have a fcc structure and have diameters from 4 nm to 8 nm and a magnetic saturation (Ms) of from 235 to 240 emu/g.