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US 10,475,559 B1Granted
Controlling the morphology in metal loaded paste material
AssigneeMaxim Integrated Products, Inc.
InventorsNazanin Davani, Joseph P. Ellul, Uppili Sridhar
Life of this patent
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Abstract
A process for producing a magnetic core material is disclosed. The process includes distributing particles within a solution medium to form a colloidal solution. The process further includes modifying a surface chemistry of the particles by adding one or more additives to the colloidal solution. The process further includes gelating the colloidal solution to form the magnetic core material.
Claims9
A process for producing a magnetic core material, the process comprising:
- distributing particles within a solution medium to form a colloidal solution, the particles including cobalt nanoparticles, the solution medium including sodium silicate;
- modifying a hydrophobicity of the particles by forming a silica layer on a surface of the particles in the colloidal solution, the hydrophobicity of the particles controlled to establish and maintain a particle separation distance between the particles in the range of about 1 nanometer to about 10 nanometers;
- controlling a ratio of cobalt to silica of the cobalt nanoparticles and the silica layer at least by adding tetramethoxysilane, a surfactant, and water to the colloidal solution;
- and
- gelating the colloidal solution to form a gel, the particles and the gel forming the magnetic core material.
2 more elements
A process for producing a magnetic core material, the process comprising:
- distributing metal particles within a solution medium to form a colloidal solution, the solution medium being an insulating material, the particles including cobalt nanoparticles, the solution medium including sodium silicate;
- modifying a surface chemistry of the particles by forming a silica layer on a surface of the particles in the colloidal solution to control repulsion forces between the particles by modifying hydrophobicity of the particles, the hydrophobicity of the particles controlled to establish and maintain a particle separation distance between the particles in the range of about 1 nanometer to about 10 nanometers;
- controlling a ratio of cobalt to silica of the cobalt nanoparticles and the silica layer at least by adding tetramethoxysilane, a surfactant, and water to the colloidal solution;
- and
- gelating the colloidal solution to cause the solution medium to form a gel, the gel being an insulating matrix, the particles being distributed within the gel, the particles and the gel forming the magnetic core material,
- wherein gelating the colloidal solution includes controlling one or more gelation parameters for controlling a pore distribution of the gel.
3 more elements
Dependencies are inferred from the claim text.