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Although a variety of methodologies/techniques have been used to prepare h-BN powders with different sizes and purities, only a few methods are reported to synthesize r-BN. In this work, highly crystalline r-BN with a purity of 94wt% was successfully synthesized in sodium chloride molten salt using Na2B4O7 and Mg powders as starting materials at 1000°C in nitrogen atmosphere. The sodium (Na) produced...
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