8764 results about "Core shell" patented technology

A particle (10) of ferromagnetic powder for use in preparation of soft magnetic core components has a core-shell structure. The particle includes a central core (12) and a shell (14) coated on the central core. The central core is made of magnetic material and is used for providing the necessary magnetic property for the magnetic core components made from the ferromagnetic powder. The shell has a higher electrical resistance than the central core so as to reduce an eddy current loss of the magnetic core component. The shell also functions to provide an excellent bonding strength between particles of the powder.

Disclosed is a method for producing core-shell type metallic nanoparticles involving (i) providing a dispersion of a first metal as nanoparticles in an appropriate organic solvent; (ii) providing a solution of a metallic precursor containing a second metal in an appropriate organic solvent, in which the second metal has a reduction potential higher than that of the first metal; and (iii) combining the dispersion from (i) and the solution from (ii) together to carry out the transmetalation reaction of the first and second metals, thereby forming core-shell type metallic nanoparticles.

Exemplary embodiments provide semiconductor devices including high-quality (i.e., defect free) group III-N nanowires and uniform group III-N nanowire arrays as well as their scalable processes for manufacturing, where the position, orientation, cross-sectional features, length and the crystallinity of each nanowire can be precisely controlled. A pulsed growth mode can be used to fabricate the disclosed group III-N nanowires and / or nanowire arrays providing a uniform length of about 10 nm to about 1000 microns with constant cross-sectional features including an exemplary diameter of about 10-1000 nm. In addition, high-quality GaN substrate structures can be formed by coalescing the plurality of GaN nanowires and / or nanowire arrays to facilitate the fabrication of visible LEDs and lasers. Furthermore, core-shell nanowire / MQW active structures can be formed by a core-shell growth on the nonpolar sidewalls of each nanowire.

A core-shell ceramic particulate is provided. The core-shell ceramic particulate comprises a core particulate structure comprising a plurality of primary particulates and a plurality of primary pores; and a shell at least partially enclosing the core particulate structure. Each of the primary particulates comprises a plurality of secondary particulates and a plurality of secondary pores; and the shell comprises a plurality of tertiary particulates and a plurality of tertiary pores. A method of making a core-shell ceramic particulate is provided. The method comprises the steps of providing a core particulate structure comprising a plurality of primary particulates and a plurality of primary pores wherein each primary particulate comprises a plurality of secondary particulates and a plurality of secondary pores; and disposing a shell comprising a plurality of tertiary particulates and a plurality of tertiary pores onto the core particulate structure.

Specific core-shell binders and magnetic additives for use in ink-jet printing ink compositions are provided. One class of specific core / shell binders has the general formula [AmBnC'p]x, where A and B are hydrophobic components in which A exhibits a glass transition temperature Tg between about -150° and +25° C. and B exhibits a glass transition temperature greater than 25° C., C' is a component that forms hydrophilic or water-soluble component in the polymer chain, and has an ionic or non-ionic structure, m<30 wt %, n>40 wt %, and p<30 wt %, with the total of m+n+p=100 wt %, and x=1 to 100,000. The molecular weight (weight average) of the polymer is between about 1,000 and 2,000,000. The polymers useful in the practice of the invention are prepared by emulsifying the monomers and then conducting a free-radical polymerization in water. The foregoing binder polymer is used in conjunction with magnetic additives comprising either (a) inorganic magnetic compound containing at least one of iron, cobalt, and nickel or (b) organic magnetic complexes containing at least one of iron, cobalt, and nickel or (c) organic charge transfer complexes that exhibit magnetic properties. The ratio of binder (I) to colorant (pigment) is greater that 1 to 10. The concentration of the magnetice additive is within the range of 1 to 30 wt %. The general ink formulation comprises: 5 to 50 wt % water-miscible solvent; 0.5 to 10 wt % colorant; 1 to 30 wt % magnetice additive; and water.