Layer-structured BCxN compounds produced from mixed melt of C and BN

Melting method for synthesizing BCxN compounds has been improved, where the starting material is a mixture containing C and BN and wholly melted without reacting the container wall. Product is composed of two phases of BCxN compounds. Their structures are cleared to be of the hBN-type and of the graphite-type, respectively. Variation of lattice parameters of the both phases and their formation ratio are investigated in relation to the composition of the starting mixture. Existence of ordered arrangement of B, C and N atoms is suggested, too. A structure model is given for the phase of the hBN-type.