Abstract
Nanocrystalline boron carbide (B4C) was synthesized via a solvothermal reduction of carbon tetrachloride using metallic lithium as reductant in the presence of amorphous boron powder at 600°C in an autoclave. The X‐ray diffraction pattern of the product powder was indexed to the hexagonal B4C phase, with lattice constants a=5.606 and c=12.089 Å. The sample was also characterized by Raman spectrum, X‐ray photoelectron spectroscopy and inductively coupled plasma atomic emission spectrometry. Transmission electron microscopy revealed that the B4C nanocrystallites were slightly agglomerated, with a particle size of approximately 15–40 nm in diameter.
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