A surface-treated aggregated boron nitride powder is prepared by using the boron nitride powder as the raw material, adding an oxidizer to the boron nitride aggregated grains, wet-pulverizing or wet-crushing the grains for surface modification treatment of the particles and allowing reaction of the particles with a metal coupling agent. The surface-treated boron nitride aggregated grains are formed by aggregation of hexagonal h-BN primary particles; (B) have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (C) have a crushing strength of 5 MPa or more; and (D) have an average particle diameter of 20 μm or more and 100 μm or less.

A surface-treated aggregated boron nitride powder is prepared by using the boron nitride powder as the raw material, adding an oxidizer to the boron nitride aggregated grains, wet-pulverizing or wet-crushing the grains for surface modification treatment of the particles and allowing reaction of the particles with a metal coupling agent. The surface-treated boron nitride aggregated grains are formed by aggregation of hexagonal h-BN primary particles; (B) have any one or more of Si, Ti, Zr, Ce, Al, Mg, Ge, Ga, and V in an amount of 0.1 atm % or more and 3.0 atm % or less in its composition on the surface of 10 nm; (C) have a crushing strength of 5 MPa or more; and (D) have an average particle diameter of 20 μm or more and 100 μm or less.

The present invention relates to a method and an apparatus for coating large area solid substrates such as flakes, powder, beads, and fibres with metal-based coatings by heating the substrate with a powder mixture including reducible metal oxides and a reducing agent. The method is particularly suited for production of substrates coated with metals, alloys and compounds based on Ti, Al, Zn, Sn, In, Sb, Ag, Co, V, Ni, Cr, Mn, Fe, Cu, Pt, Pd, Ta, Zr, Nb, Rh, Ru, Mo, Os, Re and W.

Hybrid particles having improved electrical conductivity and thermal and chemical stabilities are disclosed. The hybrid particles are for use in conductive pastes. The hybrid particles include a nanoparticle selected from a graphene-containing material, a dichalcogenide material, a conducting polymer, or a combination thereof encapsulated in a conducting metal. The hybrid particles include a nanoparticle selected from a graphene-containing material, a dichalcogenide material, or a combination thereof encapsulated in a conducting polymer, and optionally further in a conducting metal. Suitable conducting metals include nickel or silver. Suitable conducting polymers include polyaniline, polypyrrole, or polythiophene. Suitable dichalcogenide materials include MoS.sub.2 or MoSe.sub.2. The hybrid particles can further include a conducting polymer layer on an outer surface of the conducting metal. Methods of making the hybrid particles are also disclosed.

A method of forming magnetic/plasmonic hybrid structures is disclosed. The method includes synthesizing colloidal magnetic nanoparticles; modifying the magnetic nanoparticles in a solution of a polymeric ligand; binding metal seed nanoparticles to the surface of the magnetic nanoparticles; and performing a seed-mediated growth on the metal seed nanoparticles by reducing a metal salt in solution to form the magnetic/plasmonic hybrid structures.

A boron nitride powder includes boron nitride aggregated grains that are formed by aggregation of scaly hexagonal boron nitride primary particles, the boron nitride powder having the following characteristic properties (A) to (C): (A) the primary particles of the scaly hexagonal boron nitride have an average long side length of 1.5 μm or more and 3.5 μm or less and a standard deviation of 1.2 μm or less; (B) the boron nitride aggregated grains have a grain strength of 8.0 MPa or more at a cumulative breakdown rate of 63.2% and a grain strength of 4.5 MPa or more at a cumulative breakdown rate of 20.0%; and (C) the boron nitride powder has an average particle diameter of 20 μm or more and 100 μm or less. Also provided are a method for producing the same and a thermally conductive resin composition including the same.

An object of the present invention is to provide a semi-hard magnetic white powder having characteristics suitable as a security pigment, such as the magnetic powder contained in magnetic inks used for MICR. The white powder includes base particles made of a semi-hard magnetic Alnico alloy, the base particles having a titanium oxide film and a metallic silver film in this order on the surfaces thereof.

Conductive, lightweight, corrosion-resistant fiber mats are described herein. More particularly a metalized fiber mat of non-woven fibers has a conductive metal coating of a uniform thickness and a corrosion-resistant metal coating of a uniform thickness. Methods of producing such fiber mats are also provided.

Radar transmissive pigments, coatings, films, articles, method of manufacture thereof, and methods of use thereof are provided. The pigment comprises a non-conductive composite. The non-conductive composite comprises a semiconductor and/or a dielectric, and a metal dispersed in and/or on the semiconductor and/or dielectric. The pigment has an aspect ratio of at least 5 as measured by the Aspect Ratio Test.

Provided are composite particles having the optical characteristic of a lower transmittance in the visible light region, i.e., a higher light-blocking performance in the visible light region, and a method for producing composite particles. The composite particles have at least one of Al and Ti formed into a composite with ZrN.