The experiments for synthesis of h-BN were carried out under N_2 atmosphere using borax and urea as reactants.The production and evolution process of h-BN and the main byproduct were studied.Samples were analyzed by TG-DSC,XRD and SEM.The results indicate that the synthesis reaction of h-BN is finished at about 700℃and the crystallinity of h-BN improves with the temperature increasing.The production of NaBO_2 by-product is the main reason for the low yield of h-BN.However,the NaBO_2 by-product can improve t...
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