Disclosed in the present invention are a method for water-repellent coating treatment of a boron nitride powders and water-repellent treated boron nitride, the method comprising producing a water-repellent coating layer on the surface of the boron nitride powders by plasma treatment using a silicon-containing organic compound containing silicone, wherein the water-repellent coating layer remains on the boron nitride through chemical binding with the boron nitride even after ultrasonic water washing.

Disclosed in the present invention are a method for water-repellent coating treatment of a boron nitride powders and water-repellent treated boron nitride, the method comprising producing a water-repellent coating layer on the surface of the boron nitride powders by plasma treatment using a silicon-containing organic compound containing silicone, wherein the water-repellent coating layer remains on the boron nitride through chemical binding with the boron nitride even after ultrasonic water washing.

The structural integrity and viscoelastic performance of boron nitride nanotube (BNNT) materials may be improved through forming a compressed BNNT buckyweave. The BNNT buckyweave may be formed from a BNNT buckypaper having a bulk nanotube alignment (partial alignment) that may be maintained when forming the BNNT buckyweave, and compression may be parallel to and/or perpendicular to the partial alignment. The BNNT material may be viscoelastically-enhanced through, e.g., selection of synthesized BNNT material, impurity removal/reduction, BNNT alignment, isotopically enhancement, and compression relative to alignment. BNNT buckyweave s are introduced. The present approach provides viscoelastic behavior over temperatures from near absolute zero to near 1900 K. The transport of phonons along the BNNT molecules may be enhanced by utilizing isotopically enhanced BNNTs.

The structural integrity and viscoelastic performance of boron nitride nanotube (BNNT) materials may be improved through forming a compressed BNNT buckyweave. The BNNT buckyweave may be formed from a BNNT buckypaper having a bulk nanotube alignment (partial alignment) that may be maintained when forming the BNNT buckyweave, and compression may be parallel to and/or perpendicular to the partial alignment. The BNNT material may be viscoelastically-enhanced through, e.g., selection of synthesized BNNT material, impurity removal/reduction, BNNT alignment, isotopically enhancement, and compression relative to alignment. BNNT buckyweave s are introduced. The present approach provides viscoelastic behavior over temperatures from near absolute zero to near 1900 K. The transport of phonons along the BNNT molecules may be enhanced by utilizing isotopically enhanced BNNTs.

Described herein are antipathogenic compositions comprising a nitride chosen from aluminum nitride, boron nitride, chromium nitride, cerium nitride, hafnium nitride, lanthanum nitride, phosphorous nitride, sulfur nitride, tantalum nitride, titanium nitride, vanadium nitride, yttrium nitride, zirconium nitride, silicon nitride, or combinations thereof, and methods of using said compositions to inactivate viruses, bacteria, and/or fungi.

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.

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.

One aspect of the present invention is a boron nitride powder composed of aggregates of primary particles of boron nitride, wherein the boron nitride powder has an average diameter of 40 μm or more and an average sphericity of less than 0.70.

One aspect of the present invention is a boron nitride powder composed of aggregates of primary particles of boron nitride, wherein the boron nitride powder has an average diameter of 40 μm or more and an average sphericity of less than 0.70.

Processes for synthesizing the hexagonal polymorph of boron nitride (h-BN) produce h-BN of a grade that is highly suitable for ultraviolet (UV) field-emission lights and other UV applications.