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In situ boron, or phosphorous doped silicon nanoparticles were synthesised by pyrolysis of monosilane-diborane and monosilane-phosphane mixtures in free-space reactors. The studies were performed under atmospheric pressure in a laboratory reactor and a pilot plant for examination of scale-up effects. In the laboratory scale experiments, 1 vol % monosilane diluted in helium was used. The synthesis...
Silicon nanopowders were prepared by hot-wire chemical vapour deposition (CVD) from monosilane. Wire materials including Hf, Nb, Ta, Mo, W, Rh, Re, Ir, Pd, and Pt were tested. The filament temperature was varied in the range of 400–2000 ℃ and pressures between 1.0–1.5 bar. Products were characterised by bulk elemental analysis and a laser granulometer. The powders were investigated by TG-DSC-MS under...
Amorphous silicon nitrides were prepared by gas phase ammonolysis of tetrachlorosilane followed by thermal treatment in nitrogen or ammonia atmosphere. After deposition of platinum on the materials the obtained catalysts proved to be catalytically active and selective for propane dehydrogenation. Incorporation of boron, carbon and titanium in the supports influences significantly the catalytic properties...
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