Inframat Corporation

Other

Yide Zhang

Danny Tongsan Xiao

Zongtao Zhang

Xinqing Ma

Shiqiang Hui

Shihe Wang

Mingzhong Wu

Shihui Ge

Dajing Yan

A precursor tape casting method is one in which chemical precursors are converted into a final chemical phase from green tapes to products. Because chemical precursors are employed rather than the final powder materials, sintering is not required to form the material. Lower annealing temperatures instead of high temperature sintering allow the formation of grains of about 1 to about 100 nanometers in the final material. In addition, when the final material is a magnetic/insulator composite, improved magnetic properties may be obtained.

Tape casting method and tape cast materials

Thick film magnetic/insulating nanocomposite materials, with significantly reduced core loss, and their manufacture are described. The insulator coated magnetic nanocomposite comprises one or more magnetic components, and an insulating component. The magnetic component comprises nanometer scale particles (about 1 to about 100 nanometers) coated by a thin-layered insulating phase. While the intergrain interaction between the immediate neighboring magnetic nanoparticles separated by the insulating phase provides the desired soft magnetic properties, the insulating material provides high resistivity, which reduces eddy current loss.

Thick film magnetic nanoparticulate composites and method of manufacture thereof

A series of bulk-size magnetic/insulating nanostructured composite soft magnetic materials with significantly reduced core loss and its manufacturing technology. This insulator coated magnetic nanostructured composite is comprises a magnetic constituent, which contains one or more magnetic components, and an insulating constituent. The magnetic constituent is nanometer scale particles (1-100 nm) coated by a thin-layered insulating phase (continuous phase). While the intergrain interaction between the immediate neighboring magnetic nanoparticles separated by the insulating phase (or coupled nanoparticles) provide the desired soft magnetic properties, the insulating material provides the much demanded high resistivity which significantly reduces the eddy current loss. The resulting material is a high performance magnetic nanostructured composite with reduced core loss.

Insulator coated magnetic nanoparticulate composites with reduced core loss and method of manufacture thereof

A method of magnetic annealing a crystalline or nanocrystalline magnetic alloy under application of a dynamic magnetic field, i.e., an external magnetic field whose direction undergoes a periodic change in a plane, at an elevated temperature, preferably in a range of from about 300&deg; C. to about 800&deg; C. The applied dynamic magnetic field preferably has a maximum strength in a range of from about 1 to about 1000 Oersteds and is one of a rotation magnetic field, an elliptic-polarized magnetic field, an oscillation magnetic field, and a pair of pulsed magnetic fields.

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Storrs, CT, United States of America

Yide Zhang