摘要:
In an embodiment, a method of making isotropic boron nitride includes combining anisotropic boron nitride comprising an interstice with a supercritical fluid; penetrating the interstice with the supercritical fluid, expanding the interstice to form the isotropic boron nitride, and optionally repeating the combining, penetrating or expanding.
摘要:
This invention relates to a method for exfoliating inorganic layered compounds to form two- dimensional (2D) inorganic compounds. These two-dimensional compounds have the same sort of physical form as graphene in that they can be obtained as single-or few-layered molecular crystals. It also relates to suspensions of two-dimensional compounds which arise from the exfoliation method. The present invention thus relates to a process for the production of 2-D materials including, but not limited to, graphene. The 2-D materials of the invention are inorganic materials and whilst there are significant chemical differences between the various types of materials, they share the common feature of having strong in-plane covalent bonds within each layer but with layers which interact with each other via weak van der Waals bonds. This leads the sheets to stack into 3-dimensional bulk crystals. Upon exfoliation, single-layer inorganic nanosheets exhibit attractive new set of properties for use in nanoelectronics, optoelectronics, catalysis, thermal managements, etc. The 2-D materials are produced by the process of the invention in a liquid medium in the form of either a monolayer or few-layer thick materials. These materials can be regarded generically as nanoplatelet structures and are often known as nanoplatelets for brevity. The exfoliation of graphene and other 2-D materials occurs as the result of a delicate balance between thermodynamic and kinetic factors.
摘要:
The present invention is directed to a process for the synthesis of alkali metal tetrahydroborates-10B and amine borane-10B precursors, such as sodium tetrahydroborate-10B and triethylamine borane-10B.
摘要:
The present invention provides compositions comprising a metal amidoborane and an amine, and processes for preparing the metal amidoborane compositions. In particular, the process comprises contacting ammonia borane with a metal amide in the presence of an amine solvent to form the metal amidoborane composition. The invention also provides methods for generating hydrogen, wherein the method comprises heating the metal amidoborane composition such that hydrogen is released.
摘要:
La présente invention concerne un procédé pour l'obtention de borazane, ledit procédé convenant pour l'obtention de borazane renfermant un faible taux d'impuretés. Le borazane (obtenu par réaction d'au moins un sel d'ammonium avec au moins un borohydrure de métal alcalin et/ou alcalino-terreux) en solution dans le THF est précipité sélectivement avec un non solvant. Ledit borazane précipité peut encore être purifié par dissolution sélective. Le borazane obtenu après précipitation et dissolution sélectives renferme moins de 1 % en masse d'impuretés et/ou ne présente pas de décomposition exothermique à l'état solide avec une plage de température du pic endothermique de fusion au- delà de 110°C.
摘要:
Die Erfindung betrifft ein Verfahren zur kontinuierlichen Herstellung von präkeramischen Polymeren. Das Verfahren umfasst die Synthese der Polymere, ihre Abtrennung aus dem Reaktionsgemisch und die thermische Konditionierung zur Einstellung des Vernetzungsgrades und der Theologischen Eigenschaften in einem einzigen integrierten Verfahren. Die hergestellten Polymere dienen als Ausgangsstoffe für die Herstellung nicht- oxidischer Keramiken im ternären oder quatemären System X/Y/N bzw. X/Y/N/C. Derartige Werkstoffe zeichnen sich durch hohe thermische, mechanische und chemische Beständigkeit aus, wobei X und Y beliebige Kombinationen u.a. der Elemente Si, B, P, Al, Ti, V, Zr, Ta darstellen.
摘要翻译:本发明涉及一种用于连续制备陶瓷先驱体聚合物的方法。 该方法包括的聚合物的合成,从反应混合物中并在一个单一的集成的处理调整交联和流变学特性的程度的热调节它们的分离。 制备作为起始材料的三元或四元系X / Y / N或X / Y / N / C.制备非氧化物陶瓷的聚合物 这样的材料的特征在于高的热,机械和耐化学性,其中X和Y是任意的组合包括 表示元素Si,B,P,铝,钛,钒,锆,钽。
摘要:
The invention provides novel inorganic boranophosphate salts that can be used as fertilizers, in detergent formulations, as additive in melts for the glass industry, in boron neutron-capture therapy of cancer, and as synthetic building blocks in the synthesis of boranonucleotides of various lengths.
摘要:
The present disclosure relates to sheath-core bicomponent fibers, wherein the sheath comprises a first thermoplastic polymer and the core comprises a second thermoplastic polymer and hexagonal boron nitride. The first thermoplastic polymer and the second thermoplastic polymer may be the same or different.The present disclosure further relates to a method of manufacturing such a sheath-core bicomponent fiber, as well as yarns or textiles comprising such sheath-core bicomponent fibers.