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AssigneesUniversite Pierre Et Marie Curie (Paris 6), Centre National de la Recherche Scientifique (CNRS), Univ Paris Xii-Nord Villetaneuse
InventorsYann Le Godec, Vladimir A. Mukhanov, Vladimir L. Solozhenko, Petr S. Sokolov, Dominique Vrel
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The present invention relates to a process for the preparation of a boron phosphide, more specifically BP and/or B12P2, comprising the mechanochemical reaction of boron phosphate (BPO4) with at least one alkaline earth metal (EA). In particular, the process of the invention allows for the selective preparation of either BP or B12P2 with more than 95% purity, through the reduction of boron phosphate (BPO4) with at least one alkaline earth metal (EA) according to reaction (1) for BP and according to reaction (2) for B12P2: BPO4+4 EA→BP+4 EA(O) (1) 2BPO4+5 (EA)B2+3 EA→B12P2+8 EA(O) (2). The present invention further relates to boron phosphide powders, in particular BP or B12P2 powders, of nanometric or micrometric size.
A process for the preparation of a boron phosphide, wherein the process is a mechanochemical reaction of a powder of boron phosphate (BPO4) mixed with a powder of at least one alkaline earth metal (EA) by a mechanical device providing mechanical energy which allows to initiate and carry out the mechanochemical reaction between the powder of boron phosphate (BPO4) and the powder of at least one alkaline earth metal (EA), for directly obtaining said boron phosphide without any external thermal heating, said boron phosphide being BP and/or B12P2, and the mechanochemical reaction is carried out in a mill.
Dependencies are inferred from the claim text.