Abstract:
A method of preparing a boron nitride material, such as boron nitride (BN) or boron carbonitride (BCN), is provided. The method may include providing a substrate, and sublimating an amine borane complex onto the substrate to obtain the boron nitride material. The amine borane complex may include, but is not limited to, borazine, amino borane, trimethylamine borane and triethylamine borane. In addition, the temperature at which the sublimating is carried out may be varied to control composition of the boron nitride material formed. In addition, various morphologies can be obtained by using the present method, namely films, nanotubes and porous foam.
Abstract:
According to embodiments of the present invention, a composite material is provided, comprising an interconnected network comprising a material that is thermally conductive and electrically insulative, and a polymer. Preferably, the composite material comprises hexagonal boron nitride network and polyimide. The hexanogal boron nitride network is preferably formed on a template by chemical vapour deposition. The interconnected network is preferably about 0.3 vol% or less of the composite material. According to further embodiments of the present invention, a method of forming a composite material, and an electrical component are also provided. Said composite material may be useful as flexible electrical elements.
Abstract:
There is provided a chemical vapor deposition process comprising heating a porous metal template at a temperature range of 500 to 2000 ºC; passing a gas mixture comprising a carrier gas carrying along a vapor of an organometallic compound and at least one of a carbon precursor gas and a boron nitride precursor gas through the heated metal template, wherein the heating temperature causes the decomposition of the organometallic compound vapor into metal particles, the carbon precursor gas into graphene domains, and/or the boron nitride precursor gas into hexagonal-boron nitride domains, further wherein the graphene domains and/or the hexagonal-boron nitride domains nucleate and grow on the metal particles and the metal template to form a three-dimensional interconnected porous network of graphene and/or the hexagonal-boron nitride. There is also provided a foam-like structure produced by a process as described above. There is also provided a foam-like structure as described above for use in electrochemistry, solar cells, filler, thermal interface material, sensing or biological applications.